Re: Alpha and Beta particle Spec
Geo,
I¡¯m looking for the
numbers ¨C what was the flow rate and how long was it running when you took that
picture?
Until you get another filter
I would not load that one up as it¡¯ll take over 8 hrs to calm down due to the
Bi-212
I can only assume the
calculations will adjust for this but this unit is set up to monitor relatively
steady state Rn-222 as set up by the factory. How to switch it over to a user defined
and calibrated ROI type is a question we need answered by the factory. Remember
this is not a lab alpha spectrometer it¡¯s a CAM. There are procedures for source
calibrating ROI¡¯s in the manual. I would not change any ROI¡¯s right now that
would be asking for trouble without more guidance.
Dud
?
?
Yes it has to run for a
good long time to get your stable reading, when first started pumping it reads
very low, orders of magnitude.
NICK- ask this question of
your contact - what OTHER isotopes can it be calibrated to? Today I tried changing
the Regions of interested or shutting them off, but it wouldn't seem to let
that happen. I suspect we can block the Uranium generated radon from alarming
and just have the Thorium radon set it off?
I think I'll let it smell
Thoron gas for a while and watch the spectrum.
toggle quoted message
Show quoted text
----- Original Message
-----
From: Dude <dfemer@...>
To: [email protected]
Sent: Mon, 30 May 2022 15:48:04 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
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Geo,
Yes 1.8 pCi/l you just
have to multiply the screen reading by 1000 to get Liters.
How long was that run when
you took the picture, 53 min or so? and what was the flow rate ?0.87 l/m?
?That low radon count must be from a limestone bedrock or you opened a
window.
Dud
?
?
?
doesn't that work out to
1.8pCi/L?
That's about right for
here, I think. Normal background Gamma is low here in particular because behind
the house is no ground, just air.
----- Original Message
-----
From: Dude <dfemer@...>
To: [email protected]
Sent: Mon, 30 May 2022 13:32:55 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
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Geo,
You may have to
recalibrate the touch screen . Mine was very hard to get the monitor tab to
come up. There is a procedure in the manual that will allow you to fix the
touch
screen positions. I found using a soft pointed touch screen pen worked better
than fingers on that top bar.. Be careful not to scratch the screen with a hard
pointy pen.
?
How long was that run when
you took the picture 53 min or so? and what was the flow rate ?0.87 l/m?
?That
low radon count must be from a limestone bedrock or you opened a window.
Dud
?
?
It took more time to
figure out you can't punch those buttons easily with FF (Fat Fingers) Tried
some tools and found something that worked AOK. Following your instructions was
easy (sort of, regular easy, like training a cat easy, not easy-peasy).
Results are in line with
the other instruments now. Those have been taken in other rooms though, but
very close.
Will set them all up in
same place and see for real.
|
Re: Alpha and Beta particle Spec
Yes it has to run for a good long time to get your stable reading, when first started pumping it reads very low, orders of magnitude.
NICK- ask this question of your contact - what OTHER isotopes can it be calibrated to? Today I tried changing the Regions of interested or shutting them off, but it wouldn't seem to let that happen. I suspect we can block the Uranium generated radon from alarming and just have the Thorium radon set it off?
I think I'll let it smell Thoron gas for a while and watch the spectrum.
Geo
----- Original Message ----- From: Dude <dfemer@...> To: [email protected]Sent: Mon, 30 May 2022 15:48:04 -0400 (EDT) Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta particle Spec
Geo, Yes 1.8 pCi/l you just
have to multiply the screen reading by 1000 to get Liters. How long was that run when
you took the picture, 53 min or so? and what was the flow rate ?0.87 l/m?
?That low radon count must be from a limestone bedrock or you opened a
window. Dud ? ? ? doesn't that work out to
1.8pCi/L? That's about right for
here, I think. Normal background Gamma is low here in particular because behind
the house is no ground, just air. ----- Original Message
-----
From: Dude <dfemer@...>
To: [email protected]
Sent: Mon, 30 May 2022 13:32:55 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
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Geo, You may have to
recalibrate the touch screen . Mine was very hard to get the monitor tab to
come up. There is a procedure in the manual that will allow you to fix the
touch
screen positions. I found using a soft pointed touch screen pen worked better
than fingers on that top bar.. Be careful not to scratch the screen with a hard
pointy pen. ? How long was that run when
you took the picture 53 min or so? and what was the flow rate ?0.87 l/m?
?That
low radon count must be from a limestone bedrock or you opened a window. Dud ? ? It took more time to
figure out you can't punch those buttons easily with FF (Fat Fingers) Tried
some tools and found something that worked AOK. Following your instructions was
easy (sort of, regular easy, like training a cat easy, not easy-peasy). Results are in line with
the other instruments now. Those have been taken in other rooms though, but
very close. Will set them all up in
same place and see for real.
|
Re: Alpha and Beta particle Spec
Geo,
Yes 1.8 pCi/l you just
have to multiply the screen reading by 1000 to get Liters.
How long was that run when
you took the picture, 53 min or so? and what was the flow rate ?0.87 l/m?
?That low radon count must be from a limestone bedrock or you opened a
window.
Dud
?
?
?
doesn't that work out to
1.8pCi/L?
That's about right for
here, I think. Normal background Gamma is low here in particular because behind
the house is no ground, just air.
toggle quoted message
Show quoted text
----- Original Message
-----
From: Dude <dfemer@...>
To: [email protected]
Sent: Mon, 30 May 2022 13:32:55 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
margin: 0.0in;
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/*]]>*/
Geo,
You may have to
recalibrate the touch screen . Mine was very hard to get the monitor tab to
come up. There is a procedure in the manual that will allow you to fix the
touch
screen positions. I found using a soft pointed touch screen pen worked better
than fingers on that top bar.. Be careful not to scratch the screen with a hard
pointy pen.
?
How long was that run when
you took the picture 53 min or so? and what was the flow rate ?0.87 l/m?
?That
low radon count must be from a limestone bedrock or you opened a window.
Dud
?
?
It took more time to
figure out you can't punch those buttons easily with FF (Fat Fingers) Tried
some tools and found something that worked AOK. Following your instructions was
easy (sort of, regular easy, like training a cat easy, not easy-peasy).
Results are in line with
the other instruments now. Those have been taken in other rooms though, but
very close.
Will set them all up in
same place and see for real.
|
Pictures of inside the IMPEX ALPHA head.
4 screws and the "nose cone" top part of the sensor housing separates. It has the sensor in it, hardwired with 6 wire umbilical cord. Sensor faces down towards the filter, and the lever mechanism that allows filters to be changed rotates the screened filter back downward to accommodate that. When the lever is rotated back to park/locked location, the filter back module cams up, pressing the filter home, blocking external light and air paths, while a switch on the lever alerts the control box there was a filter change. The popup dialog box must be ticked "was the filter replaced Y/N" to continue. Aside from that action there are no other mechanisms present in the slot. Below the back screen in the larger part of the sensor housing everything there has to do with airflow, much of the plumbing has to do with the Hot-Wire Anemometer air mass sensor, similar to what we have in the Eberline 6A head. Three of the 6 wires from the sensor go to those mini coaxial plugs in the main connector, the other 3 to regular signal pins. Most probably those first 3 are sensor signals, while the other 3 are power to the sensor and presumably a preamp/line driver in the "nose cone". No magic here, just updated versions of 1980 tech. The magic is in the control box computer, and that's what the patent covers. Geo 
|
Re: Alpha and Beta particle Spec
nick
A mini split ductless heat pump is great. i have a 18,000Btu unit on the west side of my house.i chose a reliable jp brand: Daikin. just in case you werent familiar, there are units that support multiple interior air handlers. keep the freon line length short to maximize efficiency.?
p
|
Re: Alpha and Beta particle Spec
Wha's your Rn reading Nick?
Under your lime stone is probably petroleum, bringing radium up from below?
House AC in trouble here too, just age., I zone heated the main house last winter and saved 1/2 on propane use. A/C next.
Basement level always just right all year. In warm weather like now, a floor fan at bottom of the steps bring up the cool air.
Runs 62-64F in coldest winter, no heating at all.
Pictures of inside of head follows.
Geo.
----- Original Message ----- From: Nick Andrews <nickjandrews@...> To: [email protected]Sent: Mon, 30 May 2022 13:45:18 -0400 (EDT) Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta particle Spec
I live on solid (fractured) limestone here in TX Hill country.? ?Well,? we do have 2-4 inches of soil,? mostly.? In my shed,? even with the sources I've mentioned being stored in there, I expect low Radon because I have a 4" fan up near the peak running exhaust continuously.? I am going to try shutting that off to see if my portable ac unit works a little better.?
The house ac is old and starting to crap out.? ?We've replaced both indoor and outdoor unit fan motors.? Looking at getting two mini split systems to have a unit in each bedroom,? kitchen,? living room,? and the shed.? ?Having two systems will be better for redundancy,? and going from this old Trane 10 SEER unit to these new ones that can be up to 23 SEER should make a difference in electric use too.? And being able to control each room and shut off unused ones even more.?
On Mon, May 30, 2022, 12:33 PM Dude < dfemer@...> wrote: Geo, You may have to
recalibrate the touch screen . Mine was very hard to get the monitor tab to
come up. There is a procedure in the manual that will allow you to fix the touch
screen positions. I found using a soft pointed touch screen pen worked better
than fingers on that top bar.. Be careful not to scratch the screen with a hard
pointy pen. ? How long was that run when
you took the picture 53 min or so? and what was the flow rate ?0.87 l/m?? That
low radon count must be from a limestone bedrock or you opened a window. Dud ? ? It took more time to
figure out you can't punch those buttons easily with FF (Fat Fingers) Tried
some tools and found something that worked AOK. Following your instructions was
easy (sort of, regular easy, like training a cat easy, not easy-peasy). Results are in line with
the other instruments now. Those have been taken in other rooms though, but
very close. Will set them all up in
same place and see for real.
|
Re: Alpha and Beta particle Spec
doesn't that work out to 1.8pCi/L?
1.8 pCi/L
That's about right for here, I think. Normal background Gamma is low here in particular because behind the house is no ground, just air.
Geo
----- Original Message ----- From: Dude <dfemer@...> To: [email protected]Sent: Mon, 30 May 2022 13:32:55 -0400 (EDT) Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta particle Spec
Geo, You may have to
recalibrate the touch screen . Mine was very hard to get the monitor tab to
come up. There is a procedure in the manual that will allow you to fix the touch
screen positions. I found using a soft pointed touch screen pen worked better
than fingers on that top bar.. Be careful not to scratch the screen with a hard
pointy pen. ? How long was that run when
you took the picture 53 min or so? and what was the flow rate ?0.87 l/m? ?That
low radon count must be from a limestone bedrock or you opened a window. Dud ? ? It took more time to
figure out you can't punch those buttons easily with FF (Fat Fingers) Tried
some tools and found something that worked AOK. Following your instructions was
easy (sort of, regular easy, like training a cat easy, not easy-peasy). Results are in line with
the other instruments now. Those have been taken in other rooms though, but
very close. Will set them all up in
same place and see for real.
|
Re: Alpha and Beta particle Spec
I live on solid (fractured) limestone here in TX Hill country.? ?Well,? we do have 2-4 inches of soil,? mostly.? In my shed,? even with the sources I've mentioned being stored in there, I expect low Radon because I have a 4" fan up near the peak running exhaust continuously.? I am going to try shutting that off to see if my portable ac unit works a little better.?
The house ac is old and starting to crap out.? ?We've replaced both indoor and outdoor unit fan motors.? Looking at getting two mini split systems to have a unit in each bedroom,? kitchen,? living room,? and the shed.? ?Having two systems will be better for redundancy,? and going from this old Trane 10 SEER unit to these new ones that can be up to 23 SEER should make a difference in electric use too.? And being able to control each room and shut off unused ones even more.?
On Mon, May 30, 2022, 12:33 PM Dude < dfemer@...> wrote:
Geo,
You may have to
recalibrate the touch screen . Mine was very hard to get the monitor tab to
come up. There is a procedure in the manual that will allow you to fix the touch
screen positions. I found using a soft pointed touch screen pen worked better
than fingers on that top bar.. Be careful not to scratch the screen with a hard
pointy pen.
?
How long was that run when
you took the picture 53 min or so? and what was the flow rate ?0.87 l/m?? That
low radon count must be from a limestone bedrock or you opened a window.
Dud
?
?
It took more time to
figure out you can't punch those buttons easily with FF (Fat Fingers) Tried
some tools and found something that worked AOK. Following your instructions was
easy (sort of, regular easy, like training a cat easy, not easy-peasy).
Results are in line with
the other instruments now. Those have been taken in other rooms though, but
very close.
Will set them all up in
same place and see for real.
|
Re: Alpha and Beta particle Spec
Geo,
You may have to
recalibrate the touch screen . Mine was very hard to get the monitor tab to
come up. There is a procedure in the manual that will allow you to fix the touch
screen positions. I found using a soft pointed touch screen pen worked better
than fingers on that top bar.. Be careful not to scratch the screen with a hard
pointy pen.
?
How long was that run when
you took the picture 53 min or so? and what was the flow rate ?0.87 l/m? ?That
low radon count must be from a limestone bedrock or you opened a window.
Dud
?
?
It took more time to
figure out you can't punch those buttons easily with FF (Fat Fingers) Tried
some tools and found something that worked AOK. Following your instructions was
easy (sort of, regular easy, like training a cat easy, not easy-peasy).
Results are in line with
the other instruments now. Those have been taken in other rooms though, but
very close.
Will set them all up in
same place and see for real.
|
Re: Alpha and Beta particle Spec
It took more time to figure out you can't punch those buttons easily with FF (Fat Fingers) Tried some tools and found something that worked AOK. Following your instructions was easy (sort of, regular easy, like training a cat easy, not easy-peasy).
Results are in line with the other instruments now. Those have been taken in other rooms though, but very close.
Will set them all up in same place and see for real.
Geo
|
Re: Vacuum pump for sampling
You hear that sound?? ?That's God laughing while we make plans...
Okay,? just got back from watching Top Gun: Maverick.? As a child of the Cold War, it was awesome.? Sorry, but seeing an F-14 fly still gives me a well,? you know...
"doh!"
That's what I say 20 times? a day,? Today it was looking when the shed project needed a piece of sheet metal sheared, and I could see the shear in the garage, but would have had to move the welder, band saw, tables saw and two cabinets to make a path to it! GGGrrrrrrrr.....
Wound up cutting the metal with a hand snips,? DOH!
But when the metal building is finished, this week we think, all will be better, every tool will have a permanent home.
Geo
----- Original Message ----- From: Nick Andrews < nickjandrews@...> To: [email protected]Sent: Sun, 29 May 2022 15:43:28 -0400 (EDT) Subject: Re: Alpha and Beta particle nuclear decay studies. Vacuum pump for sampling
I have multiple suitable transformers,? somewhere.? ?Not set up yet here though.?
And yes,? a number of flow gauges,? somewhere...doh!
WHAT? You have all that stuff and no stout 110/220 test transformer with metering??
for shame.
----- Original Message ----- From: Nick Andrews < nickjandrews@...> To: [email protected]Sent: Sun, 29 May 2022 13:10:23 -0400 (EDT) Subject: Alpha and Beta particle nuclear decay studies. Vacuum pump for sampling
Okay so I did bring my little Gast pump to Texas.? ?That's the good news.? ?The bad news is that the motor is 240vac.? And I haven't added the additional 240 outlets I need to for range,? tube furnace,? welder,? etc. next to the door where it's convenient.?
It's a Gast 0211-V87 pump.? So before I can even test it I need to either do some wiring or temp splice a dryer cord onto it to plug into my compressor outlet tucked way back in the corner behind the South Bend vertical mill.?
|
Re: Alpha and Beta particle Spec
Sweet.? ?Let me know about the contact I sent you.? I did tell him we have people with decades of experience playing with these units. I might've mentioned some facilities but no names.?
On Sun, May 29, 2022, 2:33 PM Dude < dfemer@...> wrote:
Nick / Geo
Record your original
settings before changing things.
Then open the ?Monitor tab
then Instrument options. Check only Bypass Filter Log on and calibrate in cpm
In the displayed column I¡¯ve
moved these to display
Temp
Press
?Flow
Alpha chronic
Alpha acute
Radon chronic
Radon Acute
Po-214 chronic
Po-214 acute
Po-212 chronic
Po-212 acute
Po-218 acute
P-218 chronic
When running I have the
Top display show Po-218 acute and the bottom display Radon acute.? You¡¯ll need
t multiply the pCi/ml x 1000 to get pCi/l.? The EPA action level is 4 pCi/l at
which point they think you¡¯ll die or go broke fixing it
?
On the Channel tab:
Set display units pCi (
should already be there
I¡¯m using Long as 140 and
short as 60 sec. it was 240 and 120 but I¡¯m looking for quick response.
Isotope window should be Radon
Chronic ¨C you can¡¯t change it.
Change the half life from
E-18 to 186 sec which is the Po-218 half life that the radon will be calc¡¯ed
from.
Check Archive data, Show
differential, and show activity. That will get rid of the Radon pCih/l
displayed and put radon activity pCi in its place on the screen.
Equilibrium factor is how
much Po-218 has platted out on the walls. I have generally used 0.3 but they
are using the industry standard of 0.5. leave it 0.5
?
The other tabs ( Po-212
chronic etc. ) I haven¡¯t played with yet? but the half lives and time may have
to be adjusted there as well and I¡¯ll fool with that later.
?
If you go to the View tab
and check Raw data Channel it will display raw cps. I leave that unchecked
unless I¡¯m doing a manual radon calc and need those numbers
When shutting down under
the File tab use the Shut Down option.
OK lets report those radon
room numbers. A this point don¡¯t sniff any sources as you only have one filter
to play with and you¡¯ll be surprised to see what¡¯s left showing on the Spectra the
next morning and just from room air.
Dud
?
?
?
?
Methinks we better record all those "as found" option
settings for posterity, in case we need to reset after experimental changes.
----- Original Message -----
From: Nick Andrews <nickjandrews@...>
To: [email protected]
Sent: Sat, 28 May 2022 23:15:49 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
I saw a lot of options in the menus!?
On Sat, May 28, 2022, 7:41 PM Dude <dfemer@...> wrote:
Call any time 702-521-8577.
Dud
?
?
?
Dud, when the Memorial Day
holiday is over I hope to get you on the phone to walk me through the command
change step to get the e-17 thing resolved, you know programming is not my
thing!
----- Original Message
-----
From: Dude <dfemer@...>
To: [email protected]
Sent: Sat, 28 May 2022 18:47:55 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
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Yup
?
?
?
By the way, doesn't the
red MUTE light coming on tell you it's in alarm mode already?
----- Original Message
-----
From: Nick Andrews <nickjandrews@...>
To: [email protected]
Sent: Sat, 28 May 2022 16:56:26 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
I'm thinking I don't need
the possible fragile LED stack on top,? so a possibility for me is to
either just disconnect it and cap the hole or even install red and green LEDs
in the front cover like Geo's mod on the LENi conversions.?
It looks like the little
Gast pump might've been left in NM after all.? ?I have a Thomas
compressor,? like an airbrush type, that seems to output a goodly amount
of air.? I could set it in a plastic tote with the source and have it push
air into the SmartCAM,? or rig up a different box with the source in it
hooked to the monitor with a hose to pull air through it rather than
push.? But I think pushing air through would be better so it could cool
itself more effectively.?
I simply unplugged the
Sonalert! Also the LED stack.
----- Original Message
-----
From: Nick Andrews <nickjandrews@...>
To: [email protected]
Sent: Sat, 28 May 2022 02:12:19 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
I bet just a piece of tape
over it will go a long way.? Maybe a piece of thin cardboard.?
?I was lightly holding a thumb on it and that killed most of the
noise.?
I need to pull that little
Gast I have off the trailer,? see of it works,? then if it will pull
enough volume...
On Sat, May 28, 2022, 1:08
AM Dude <dfemer@...>
wrote:
Nick,
The Gast pump is back up
after cooling down so now I put a fan on it. I¡¯ve used the Clear Latch
Conditions
often enough to mute it, but it¡¯s very ?loud getting close to it to open
the
Monitor tab.
?It actually works better
now and I had to use the valve to keep the flow below the Hi alarm
Dud.
?
?
Run a fan across the pump...
If you turn the security key,? you can Mute the alarm with
the
lower right button on screen.?
?
On Fri, May 27, 2022, 5:11 PM Dude <dfemer@...>
wrote:
Well, after 6+ hrs of running and taking 20 min data between the
RAD7 and the ?Impex CAM, the GAST pump died (yes it was hot and was maxed
out at 32L/m). I can attest to the fact the CAM LOW FAIL alarm is LOUD and hard
to mute without getting into the command mode which requires getting even
closer to the Sonalert. We¡¯re going to need a bigger pump ?What do they
recommend I wonder, my guess is a HiVol.
I think I¡¯ll go have a Dixie cup full of a fine Boxed Merlot and
grieve on the last Gasp of my poor $20 Gast pump.
Dud
?
From: dfemer [mailto:dfemer@...]
Sent: Friday, May 27, 2022 1:59 PM
To: '[email protected]'
Subject: RE: Alpha and Beta
particle
nuclear decay studies. need some pointers to background info on this topic
?
Everything is supposedly in the manual, however we live by our
wits alone.
Dud
?
?
THANKS Dud, great to know. Once I get it lined out, I'll start
comparing to the Femtotech.
how on earth did you figure that, was it in the manual?
----- Original Message -----
From: Dude <dfemer@...>
To: [email protected]
Sent: Fri, 27 May 2022 14:36:57 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers
to background info on this topic
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Geo/Nick
To convert the wacko ?E-17
radon reading go to command mode with the Key get to the Radon tab and change
the 1e-16 to 186 which is the Po218 half life.. Bring up the Radon Acute
default
page to read Po 218 acute and Radon Acute. It will be in pCi/ml multiply by
1000 to get pCi/l.? I need to use Radon raw and Po raw but I still need to
figure
out how to do that.
I¡¯m running the RAD 7and
the SmartCAM together and the CAM showing 3.5 pCi/l ?while The RAD 7 is
averaging
4.0 pCi/l ?+- 2.1. Doing a manual calculation it always comes up low by a
factor 3 or so. That ma be due to not having all their corrections in there and
using acute cps
Dud
?
?
"
Geo,
What kind of solid samples
are going to run? One needs to be very careful not to crap up the detector.
Most alpha samples are via liquid chem electro-deposited on steel disk, swipe
and air sample filters. Don¡¯t put a loose sample in there.
Dud"
?
A few different
electroplated discs on the IMPEX,
?
But other units, anything
I can lay my hands on
?
Been collecting and
waiting for this phase for a long time. All new to me.?
?
Geo
----- Original Message
-----
From: Dude <dfemer@...>
To: [email protected]
Sent: Fri, 27 May 2022 13:16:02 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers
to background info on this topic
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Peter,
The Smart Cam and usual
Radon sampling run around 32 L/min (1 cft/min).
Geo,
What kind of solid samples
are going to run? One needs to be very careful not to crap up the detector.
Most alpha samples are via liquid chem electro-deposited on steel disk, swipe
and air sample filters. Don¡¯t put a loose sample in there.
Dud
?
?
P, are you interested in
Alpha in air? That's fine, my intention was to do Alpha solid samples with my
6A head.
----- Original Message
-----
From: peter via
<epkoncept=[email protected]>
To: [email protected]
Sent: Thu, 26 May 2022 23:54:53 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers
to background info on this topic
Need some advice.
What sort of airflow does the Eberline 6A expect ?
Or more useful is what sort of airflow should I use ? I don't know how make use
of the airflow control circuit in the 6A so I thought I might plumb the air
directly from a pump.
I have an old SKC air sampler pump. It sucks, but I can also get it to pump. It
goes up to 5l/min
4l/m @ 20" of back pressure.
P
|
Re: Vacuum pump for sampling
I¡¯ve become adept at climbing
over things for long distances. It¡¯s getting it back that¡¯s the hard part.
Dud
?
?
That's what I say 20 times? a
day,? Today it was looking when the shed project needed a piece of sheet
metal sheared, and I could see the shear in the garage, but would have had to
move the welder, band saw, tables saw and two cabinets to make a path to it!
GGGrrrrrrrr.....
Wound up cutting the metal with a hand
snips,? DOH!
But when the metal building is finished,
this week we think, all will be better, every tool will have a permanent home.
toggle quoted message
Show quoted text
----- Original Message
-----
From: Nick Andrews <nickjandrews@...>
To: [email protected]
Sent: Sun, 29 May 2022 15:43:28 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Vacuum pump for
sampling
I have multiple suitable
transformers,? somewhere.? ?Not set up yet here though.?
And yes,? a number of
flow gauges,? somewhere...doh!
WHAT? You have all that
stuff and no stout 110/220 test transformer with metering??
----- Original Message
-----
From: Nick Andrews <nickjandrews@...>
To: [email protected]
Sent: Sun, 29 May 2022 13:10:23 -0400 (EDT)
Subject: Alpha and Beta particle nuclear decay studies. Vacuum pump for
sampling
Okay so I did bring my
little Gast pump to Texas.? ?That's the good news.? ?The
bad news is that the motor is 240vac.? And I haven't added the additional
240 outlets I need to for range,? tube furnace,? welder,? etc.
next to the door where it's convenient.?
It's a Gast 0211-V87 pump.?
So before I can even test it I need to either do some wiring or temp splice a
dryer cord onto it to plug into my compressor outlet tucked way back in the
corner behind the South Bend vertical mill.?
|
Re: Vacuum pump for sampling
What normally goes in those glass bottles Nick?
Geo
----- Original Message ----- From: Nick Andrews <nickjandrews@...> To: [email protected]Sent: Sun, 29 May 2022 15:47:33 -0400 (EDT) Subject: Re: Alpha and Beta particle nuclear decay studies. Vacuum pump for sampling
Good points,? and I was wondering about that because I don't want to be breathing oil mist either.? Will check for oil on output but for sure install a catch filter if there isn't one in the bottle on the outlet.?
All of my pumps are oil (except the turbo) types.? My experience with diaphragm types is that they fail...? Aquariums mostly.?
On Sun, May 29, 2022, 1:50 PM Dude < dfemer@...> wrote: Nick I have a oil type
pump on my vacuum oven and it uses scrubbers on the exhaust as there is quite a
haze without it. Do you get an oil haze out of the exhaust port?? All that is going
back in so use an exhaust filter.? An inlet filter will prevent oil back-streaming
from the pump to the evacuated chamber which is why these are used on alpha spec
systems. I would be wary of using ?that pump for that purpose. Get a diaphragm type
pump there are plenty on Ebay around $100. I also realize that we¡¯re not
dealing with a closed vacuum system but why take chances. At the very least
disconnect the vac line when finished as diffusion rules. Dud ? ? Well I shoved the cord wires in an extension cord and it actually seems
to run okay on 120vac.? Sounds pretty good,? not too loud.?
?If I completely plug the inlet hoses it slows down enough to kick in the
starter again though.? This model should be rated at 1.1-1.3cfm. I think I'll install a proper 120 plug on the cord and hook it up to
the SmartCAM and see what airflow it reports.? ? On Sun, May 29, 2022, 12:10 PM Nick Andrews via <nickjandrews=[email protected]> wrote: Okay so I did bring my little Gast pump to Texas.? ?That's
the good news.? ?The bad news is that the motor is 240vac.? And
I haven't added the additional 240 outlets I need to for range,? tube furnace,?
welder,? etc. next to the door where it's convenient.? It's a Gast 0211-V87 pump.? So before I can even test it I need to
either do some wiring or temp splice a dryer cord onto it to plug into my
compressor outlet tucked way back in the corner behind the South Bend vertical
mill.?
|
Re: Vacuum pump for sampling
"doh!"
That's what I say 20 times? a day,? Today it was looking when the shed project needed a piece of sheet metal sheared, and I could see the shear in the garage, but would have had to move the welder, band saw, tables saw and two cabinets to make a path to it! GGGrrrrrrrr.....
Wound up cutting the metal with a hand snips,? DOH!
But when the metal building is finished, this week we think, all will be better, every tool will have a permanent home.
Geo
----- Original Message ----- From: Nick Andrews <nickjandrews@...> To: [email protected]Sent: Sun, 29 May 2022 15:43:28 -0400 (EDT) Subject: Re: Alpha and Beta particle nuclear decay studies. Vacuum pump for sampling
I have multiple suitable transformers,? somewhere.? ?Not set up yet here though.?
And yes,? a number of flow gauges,? somewhere...doh!
WHAT? You have all that stuff and no stout 110/220 test transformer with metering??
for shame.
----- Original Message ----- From: Nick Andrews < nickjandrews@...> To: [email protected]Sent: Sun, 29 May 2022 13:10:23 -0400 (EDT) Subject: Alpha and Beta particle nuclear decay studies. Vacuum pump for sampling
Okay so I did bring my little Gast pump to Texas.? ?That's the good news.? ?The bad news is that the motor is 240vac.? And I haven't added the additional 240 outlets I need to for range,? tube furnace,? welder,? etc. next to the door where it's convenient.?
It's a Gast 0211-V87 pump.? So before I can even test it I need to either do some wiring or temp splice a dryer cord onto it to plug into my compressor outlet tucked way back in the corner behind the South Bend vertical mill.?
|
Re: Alpha and Beta particle Spec
Thanks Dudley, that's a tremendous boost. I'll give that a try tomorrow, and maybe try making a paper card filter holder clone to get up to near 2" filter in there. That should help the air pumps from overheating too.
With all of us having recorded the factory settings (probably they are very nearly the same), we can test changes freely and start over if we make a boo-boo.
Please, anyone who makes a change, log it here on this Group.?
By the way, my digital camera is a really old model, but it still can take a clear screenshot off the IMPEX, with no flash and hand-held. So recording the factory setting isn't hard at all.
Geo
----- Original Message ----- From: Dude <dfemer@...> To: [email protected]Sent: Sun, 29 May 2022 15:33:06 -0400 (EDT) Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta particle Spec
Nick / Geo Record your original
settings before changing things. Then open the ?Monitor tab
then Instrument options. Check only Bypass Filter Log on and calibrate in cpm In the displayed column I¡¯ve
moved these to display Temp Press ?Flow Alpha chronic Alpha acute Radon chronic Radon Acute Po-214 chronic Po-214 acute Po-212 chronic Po-212 acute Po-218 acute P-218 chronic When running I have the
Top display show Po-218 acute and the bottom display Radon acute. ?You¡¯ll need
t multiply the pCi/ml x 1000 to get pCi/l. ?The EPA action level is 4 pCi/l at
which point they think you¡¯ll die or go broke fixing it ? On the Channel tab: Set display units pCi (
should already be there I¡¯m using Long as 140 and
short as 60 sec. it was 240 and 120 but I¡¯m looking for quick response. Isotope window should be Radon
Chronic ¨C you can¡¯t change it. Change the half life from
E-18 to 186 sec which is the Po-218 half life that the radon will be calc¡¯ed
from. Check Archive data, Show
differential, and show activity. That will get rid of the Radon pCih/l
displayed and put radon activity pCi in its place on the screen. Equilibrium factor is how
much Po-218 has platted out on the walls. I have generally used 0.3 but they
are using the industry standard of 0.5. leave it 0.5 ? The other tabs ( Po-212
chronic etc. ) I haven¡¯t played with yet? but the half lives and time may have
to be adjusted there as well and I¡¯ll fool with that later. ? If you go to the View tab
and check Raw data Channel it will display raw cps. I leave that unchecked
unless I¡¯m doing a manual radon calc and need those numbers When shutting down under
the File tab use the Shut Down option. OK lets report those radon
room numbers. A this point don¡¯t sniff any sources as you only have one filter
to play with and you¡¯ll be surprised to see what¡¯s left showing on the Spectra the
next morning and just from room air. Dud ? ? ? ? Methinks we better record all those "as found" option
settings for posterity, in case we need to reset after experimental changes. ----- Original Message -----
From: Nick Andrews <nickjandrews@...>
To: [email protected]
Sent: Sat, 28 May 2022 23:15:49 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec I saw a lot of options in the menus!? On Sat, May 28, 2022, 7:41 PM Dude <dfemer@...> wrote: Call any time 702-521-8577. Dud ? ? ? Dud, when the Memorial Day
holiday is over I hope to get you on the phone to walk me through the command
change step to get the e-17 thing resolved, you know programming is not my
thing! ----- Original Message
-----
From: Dude <dfemer@...>
To: [email protected]
Sent: Sat, 28 May 2022 18:47:55 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
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Yup ? ? ? By the way, doesn't the
red MUTE light coming on tell you it's in alarm mode already? ----- Original Message
-----
From: Nick Andrews <nickjandrews@...>
To: [email protected]
Sent: Sat, 28 May 2022 16:56:26 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec I'm thinking I don't need
the possible fragile LED stack on top,? so a possibility for me is to
either just disconnect it and cap the hole or even install red and green LEDs
in the front cover like Geo's mod on the LENi conversions.? It looks like the little
Gast pump might've been left in NM after all.? ?I have a Thomas
compressor,? like an airbrush type, that seems to output a goodly amount
of air.? I could set it in a plastic tote with the source and have it push
air into the SmartCAM,? or rig up a different box with the source in it
hooked to the monitor with a hose to pull air through it rather than
push.? But I think pushing air through would be better so it could cool
itself more effectively.? I simply unplugged the
Sonalert! Also the LED stack. ----- Original Message
-----
From: Nick Andrews <nickjandrews@...>
To: [email protected]
Sent: Sat, 28 May 2022 02:12:19 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec I bet just a piece of tape
over it will go a long way.? Maybe a piece of thin cardboard.?
?I was lightly holding a thumb on it and that killed most of the
noise.? I need to pull that little
Gast I have off the trailer,? see of it works,? then if it will pull
enough volume... On Sat, May 28, 2022, 1:08
AM Dude <dfemer@...>
wrote: Nick, The Gast pump is back up
after cooling down so now I put a fan on it. I¡¯ve used the Clear Latch
Conditions
often enough to mute it, but it¡¯s very ?loud getting close to it to open
the
Monitor tab. ?It actually works better
now and I had to use the valve to keep the flow below the Hi alarm Dud. ? ? Run a fan across the pump... If you turn the security key,? you can Mute the alarm with
the
lower right button on screen.? ? On Fri, May 27, 2022, 5:11 PM Dude <dfemer@...>
wrote: Well, after 6+ hrs of running and taking 20 min data between the
RAD7 and the ?Impex CAM, the GAST pump died (yes it was hot and was maxed
out at 32L/m). I can attest to the fact the CAM LOW FAIL alarm is LOUD and hard
to mute without getting into the command mode which requires getting even
closer to the Sonalert. We¡¯re going to need a bigger pump ?What do they
recommend I wonder, my guess is a HiVol. I think I¡¯ll go have a Dixie cup full of a fine Boxed Merlot and
grieve on the last Gasp of my poor $20 Gast pump. Dud ? From: dfemer [mailto:dfemer@...]
Sent: Friday, May 27, 2022 1:59 PM
To: '[email protected]'
Subject: RE: Alpha and Beta
particle
nuclear decay studies. need some pointers to background info on this topic ? Everything is supposedly in the manual, however we live by our
wits alone. Dud ? ? THANKS Dud, great to know. Once I get it lined out, I'll start
comparing to the Femtotech. how on earth did you figure that, was it in the manual? ----- Original Message -----
From: Dude <dfemer@...>
To: [email protected]
Sent: Fri, 27 May 2022 14:36:57 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers
to background info on this topic
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Geo/Nick To convert the wacko ?E-17
radon reading go to command mode with the Key get to the Radon tab and change
the 1e-16 to 186 which is the Po218 half life.. Bring up the Radon Acute
default
page to read Po 218 acute and Radon Acute. It will be in pCi/ml multiply by
1000 to get pCi/l.? I need to use Radon raw and Po raw but I still need to
figure
out how to do that. I¡¯m running the RAD 7and
the SmartCAM together and the CAM showing 3.5 pCi/l ?while The RAD 7 is
averaging
4.0 pCi/l ?+- 2.1. Doing a manual calculation it always comes up low by a
factor 3 or so. That ma be due to not having all their corrections in there and
using acute cps Dud ? ? " Geo, What kind of solid samples
are going to run? One needs to be very careful not to crap up the detector.
Most alpha samples are via liquid chem electro-deposited on steel disk, swipe
and air sample filters. Don¡¯t put a loose sample in there. Dud" ? A few different
electroplated discs on the IMPEX, ? But other units, anything
I can lay my hands on ? Been collecting and
waiting for this phase for a long time. All new to me.? ? Geo ----- Original Message
-----
From: Dude <dfemer@...>
To: [email protected]
Sent: Fri, 27 May 2022 13:16:02 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers
to background info on this topic
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Peter, The Smart Cam and usual
Radon sampling run around 32 L/min (1 cft/min). Geo, What kind of solid samples
are going to run? One needs to be very careful not to crap up the detector.
Most alpha samples are via liquid chem electro-deposited on steel disk, swipe
and air sample filters. Don¡¯t put a loose sample in there. Dud ? ? P, are you interested in
Alpha in air? That's fine, my intention was to do Alpha solid samples with my
6A head. ----- Original Message
-----
From: peter via
<epkoncept=[email protected]>
To: [email protected]
Sent: Thu, 26 May 2022 23:54:53 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers
to background info on this topic Need some advice.
What sort of airflow does the Eberline 6A expect ?
Or more useful is what sort of airflow should I use ? I don't know how make use
of the airflow control circuit in the 6A so I thought I might plumb the air
directly from a pump.
I have an old SKC air sampler pump. It sucks, but I can also get it to pump. It
goes up to 5l/min
4l/m @ 20" of back pressure.
P
|
Re: Vacuum pump for sampling
Good points,? and I was wondering about that because I don't want to be breathing oil mist either.? Will check for oil on output but for sure install a catch filter if there isn't one in the bottle on the outlet.?
All of my pumps are oil (except the turbo) types.? My experience with diaphragm types is that they fail...? Aquariums mostly.?
On Sun, May 29, 2022, 1:50 PM Dude < dfemer@...> wrote:
Nick I have a oil type
pump on my vacuum oven and it uses scrubbers on the exhaust as there is quite a
haze without it. Do you get an oil haze out of the exhaust port?? All that is going
back in so use an exhaust filter.? An inlet filter will prevent oil back-streaming
from the pump to the evacuated chamber which is why these are used on alpha spec
systems. I would be wary of using ?that pump for that purpose. Get a diaphragm type
pump there are plenty on Ebay around $100. I also realize that we¡¯re not
dealing with a closed vacuum system but why take chances. At the very least
disconnect the vac line when finished as diffusion rules.
Dud
?
?
Well I shoved the cord wires in an extension cord and it actually seems
to run okay on 120vac.? Sounds pretty good,? not too loud.?
?If I completely plug the inlet hoses it slows down enough to kick in the
starter again though.?
This model should be rated at 1.1-1.3cfm.
I think I'll install a proper 120 plug on the cord and hook it up to
the SmartCAM and see what airflow it reports.?
?
On Sun, May 29, 2022, 12:10 PM Nick Andrews via <nickjandrews=[email protected]> wrote:
Okay so I did bring my little Gast pump to Texas.? ?That's
the good news.? ?The bad news is that the motor is 240vac.? And
I haven't added the additional 240 outlets I need to for range,? tube furnace,?
welder,? etc. next to the door where it's convenient.?
It's a Gast 0211-V87 pump.? So before I can even test it I need to
either do some wiring or temp splice a dryer cord onto it to plug into my
compressor outlet tucked way back in the corner behind the South Bend vertical
mill.?
|
Re: Vacuum pump for sampling
I have multiple suitable transformers,? somewhere.? ?Not set up yet here though.?
And yes,? a number of flow gauges,? somewhere...doh!
WHAT? You have all that stuff and no stout 110/220 test transformer with metering??
for shame.
----- Original Message ----- From: Nick Andrews < nickjandrews@...> To: [email protected]Sent: Sun, 29 May 2022 13:10:23 -0400 (EDT) Subject: Alpha and Beta particle nuclear decay studies. Vacuum pump for sampling
Okay so I did bring my little Gast pump to Texas.? ?That's the good news.? ?The bad news is that the motor is 240vac.? And I haven't added the additional 240 outlets I need to for range,? tube furnace,? welder,? etc. next to the door where it's convenient.?
It's a Gast 0211-V87 pump.? So before I can even test it I need to either do some wiring or temp splice a dryer cord onto it to plug into my compressor outlet tucked way back in the corner behind the South Bend vertical mill.?
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Re: Alpha and Beta particle Spec
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"We're up and running! "
WHEW! All is forgiven.
Geo ----- Original Message ----- From: Nick Andrews < nickjandrews@...> To: [email protected]Sent: Sun, 29 May 2022 14:18:06 -0400 (EDT) Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta particle Spec
We're up and running!?
Methinks we better record all those "as found" option settings for posterity, in case we need to reset after experimental changes.
Geo
----- Original Message -----
|
Re: Alpha and Beta particle Spec
Nick / Geo
Record your original
settings before changing things.
Then open the ?Monitor tab
then Instrument options. Check only Bypass Filter Log on and calibrate in cpm
In the displayed column I¡¯ve
moved these to display
Temp
Press
?Flow
Alpha chronic
Alpha acute
Radon chronic
Radon Acute
Po-214 chronic
Po-214 acute
Po-212 chronic
Po-212 acute
Po-218 acute
P-218 chronic
When running I have the
Top display show Po-218 acute and the bottom display Radon acute. ?You¡¯ll need
t multiply the pCi/ml x 1000 to get pCi/l. ?The EPA action level is 4 pCi/l at
which point they think you¡¯ll die or go broke fixing it
?
On the Channel tab:
Set display units pCi (
should already be there
I¡¯m using Long as 140 and
short as 60 sec. it was 240 and 120 but I¡¯m looking for quick response.
Isotope window should be Radon
Chronic ¨C you can¡¯t change it.
Change the half life from
E-18 to 186 sec which is the Po-218 half life that the radon will be calc¡¯ed
from.
Check Archive data, Show
differential, and show activity. That will get rid of the Radon pCih/l
displayed and put radon activity pCi in its place on the screen.
Equilibrium factor is how
much Po-218 has platted out on the walls. I have generally used 0.3 but they
are using the industry standard of 0.5. leave it 0.5
?
The other tabs ( Po-212
chronic etc. ) I haven¡¯t played with yet? but the half lives and time may have
to be adjusted there as well and I¡¯ll fool with that later.
?
If you go to the View tab
and check Raw data Channel it will display raw cps. I leave that unchecked
unless I¡¯m doing a manual radon calc and need those numbers
When shutting down under
the File tab use the Shut Down option.
OK lets report those radon
room numbers. A this point don¡¯t sniff any sources as you only have one filter
to play with and you¡¯ll be surprised to see what¡¯s left showing on the Spectra the
next morning and just from room air.
Dud
?
?
?
?
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On Sun, May 29, 2022, 5:06 AM Geo Dowell <GEOelectronics@...>
wrote:
Methinks we better record all those "as found" option
settings for posterity, in case we need to reset after experimental changes.
----- Original Message -----
From: Nick Andrews <nickjandrews@...>
To: [email protected]
Sent: Sat, 28 May 2022 23:15:49 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
I saw a lot of options in the menus!?
On Sat, May 28, 2022, 7:41 PM Dude <dfemer@...> wrote:
Call any time 702-521-8577.
Dud
?
?
?
Dud, when the Memorial Day
holiday is over I hope to get you on the phone to walk me through the command
change step to get the e-17 thing resolved, you know programming is not my
thing!
----- Original Message
-----
From: Dude <dfemer@...>
To: [email protected]
Sent: Sat, 28 May 2022 18:47:55 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
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Yup
?
?
?
By the way, doesn't the
red MUTE light coming on tell you it's in alarm mode already?
----- Original Message
-----
From: Nick Andrews <nickjandrews@...>
To: [email protected]
Sent: Sat, 28 May 2022 16:56:26 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
I'm thinking I don't need
the possible fragile LED stack on top,? so a possibility for me is to
either just disconnect it and cap the hole or even install red and green LEDs
in the front cover like Geo's mod on the LENi conversions.?
It looks like the little
Gast pump might've been left in NM after all.? ?I have a Thomas
compressor,? like an airbrush type, that seems to output a goodly amount
of air.? I could set it in a plastic tote with the source and have it push
air into the SmartCAM,? or rig up a different box with the source in it
hooked to the monitor with a hose to pull air through it rather than
push.? But I think pushing air through would be better so it could cool
itself more effectively.?
I simply unplugged the
Sonalert! Also the LED stack.
----- Original Message
-----
From: Nick Andrews <nickjandrews@...>
To: [email protected]
Sent: Sat, 28 May 2022 02:12:19 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. Alpha and Beta
particle Spec
I bet just a piece of tape
over it will go a long way.? Maybe a piece of thin cardboard.?
?I was lightly holding a thumb on it and that killed most of the
noise.?
I need to pull that little
Gast I have off the trailer,? see of it works,? then if it will pull
enough volume...
On Sat, May 28, 2022, 1:08
AM Dude <dfemer@...>
wrote:
Nick,
The Gast pump is back up
after cooling down so now I put a fan on it. I¡¯ve used the Clear Latch
Conditions
often enough to mute it, but it¡¯s very ?loud getting close to it to open
the
Monitor tab.
?It actually works better
now and I had to use the valve to keep the flow below the Hi alarm
Dud.
?
?
Run a fan across the pump...
If you turn the security key,? you can Mute the alarm with
the
lower right button on screen.?
?
On Fri, May 27, 2022, 5:11 PM Dude <dfemer@...>
wrote:
Well, after 6+ hrs of running and taking 20 min data between the
RAD7 and the ?Impex CAM, the GAST pump died (yes it was hot and was maxed
out at 32L/m). I can attest to the fact the CAM LOW FAIL alarm is LOUD and hard
to mute without getting into the command mode which requires getting even
closer to the Sonalert. We¡¯re going to need a bigger pump ?What do they
recommend I wonder, my guess is a HiVol.
I think I¡¯ll go have a Dixie cup full of a fine Boxed Merlot and
grieve on the last Gasp of my poor $20 Gast pump.
Dud
?
From: dfemer [mailto:dfemer@...]
Sent: Friday, May 27, 2022 1:59 PM
To: '[email protected]'
Subject: RE: Alpha and Beta
particle
nuclear decay studies. need some pointers to background info on this topic
?
Everything is supposedly in the manual, however we live by our
wits alone.
Dud
?
?
THANKS Dud, great to know. Once I get it lined out, I'll start
comparing to the Femtotech.
how on earth did you figure that, was it in the manual?
----- Original Message -----
From: Dude <dfemer@...>
To: [email protected]
Sent: Fri, 27 May 2022 14:36:57 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers
to background info on this topic
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Geo/Nick
To convert the wacko ?E-17
radon reading go to command mode with the Key get to the Radon tab and change
the 1e-16 to 186 which is the Po218 half life.. Bring up the Radon Acute
default
page to read Po 218 acute and Radon Acute. It will be in pCi/ml multiply by
1000 to get pCi/l.? I need to use Radon raw and Po raw but I still need to
figure
out how to do that.
I¡¯m running the RAD 7and
the SmartCAM together and the CAM showing 3.5 pCi/l ?while The RAD 7 is
averaging
4.0 pCi/l ?+- 2.1. Doing a manual calculation it always comes up low by a
factor 3 or so. That ma be due to not having all their corrections in there and
using acute cps
Dud
?
?
"
Geo,
What kind of solid samples
are going to run? One needs to be very careful not to crap up the detector.
Most alpha samples are via liquid chem electro-deposited on steel disk, swipe
and air sample filters. Don¡¯t put a loose sample in there.
Dud"
?
A few different
electroplated discs on the IMPEX,
?
But other units, anything
I can lay my hands on
?
Been collecting and
waiting for this phase for a long time. All new to me.?
?
Geo
----- Original Message
-----
From: Dude <dfemer@...>
To: [email protected]
Sent: Fri, 27 May 2022 13:16:02 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers
to background info on this topic
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Peter,
The Smart Cam and usual
Radon sampling run around 32 L/min (1 cft/min).
Geo,
What kind of solid samples
are going to run? One needs to be very careful not to crap up the detector.
Most alpha samples are via liquid chem electro-deposited on steel disk, swipe
and air sample filters. Don¡¯t put a loose sample in there.
Dud
?
?
P, are you interested in
Alpha in air? That's fine, my intention was to do Alpha solid samples with my
6A head.
----- Original Message
-----
From: peter via
<epkoncept=[email protected]>
To: [email protected]
Sent: Thu, 26 May 2022 23:54:53 -0400 (EDT)
Subject: Re: Alpha and Beta particle nuclear decay studies. need some pointers
to background info on this topic
Need some advice.
What sort of airflow does the Eberline 6A expect ?
Or more useful is what sort of airflow should I use ? I don't know how make use
of the airflow control circuit in the 6A so I thought I might plumb the air
directly from a pump.
I have an old SKC air sampler pump. It sucks, but I can also get it to pump. It
goes up to 5l/min
4l/m @ 20" of back pressure.
P
|
Nick Andrews
