|
spectrum Techniques UCS-20 MCA for sale.
This is the Universal Computer Spectrometer (MCA) that I used for all my sodium iodide (NaI(Tl)), and proportional based MCA, Gamma Spec and XRF, and MCS work with since the beginning of GammaSpectrometry Group It runs the same USX program (free) as does the UCS-30 but requires a 32 bit computer to work. Tesed, $600 + Shipping GEOelectronics@...
|
|
still confused myself about measurement errors
4
Hi: Please excuse my lack of knowledge. I am new to alpha spectrometry. Not having a selection of alpha check sources I was wondering if varying the distance between a detector and a check source would change the measured energy ? I made the assumption that the alpha particle would loose energy through interactions with air during its travel to the detector. Another assumption I had was that interactions would broaden the measured FWHM of the measured peak? BTW I have an Eberline Alpha 6A-opt1, which I believe has a Quantrad 500-PNC-BNC-Alum 1" sensor, but I can't find its specifications. I stumbled across and article: https://mirionprodstorage.blob.core.windows.net/prod-20220822/cms4_mirion/files/pdf/application-notes/c39168_alpha_pips_detectors_app_note_2.pdf?1557944633 and inside figure 6 caught my eye. It seems that due to the detector construction of a PIPS, the closer the detector is to a source, the wider the fwhm gets. Would that also apply to the detector in the Alpha 6A-opt1? p
|
|
X-Ray Lab data to download.
New "X-Ray Hobby" and "XRL" (X-Ray Lab) sections added to the online archive of Home Lab for free download. at https://www.qsl.net/k0ff/Home%20Lab/ Feel free to download any or all sections of the HOME LAB archive, or anything else on the K0FF site. Geo
|
|
FOCUS: Alpha/Beta Counting (no spectrometry, just counting)
2
Relevant to [email protected] Group and also [email protected] FOCUS: Alpha/Beta Counting (no spectrometry, just counting)
|
|
There are a couple of us that have these and they are great for Radon. It can also do Pu and U which may be useful in the future. There are some intricacies in setting it up to readout in pCi/l but we can send that info when you get it hooked up. Join the alpha spec group.io Dud KK7IF From: [email protected] [mailto:[email protected]] On Behalf Of Serhiy Sent: Friday, October 14, 2022 1:32 PM To: [email protected] Subject: [GeigerCounterEnthusiastsGroup] Lab Impex Systems SmartCAM Alpha Beta in Air Monitor I bought this thing and now looking for a manual, any help would be appreciated.
|
|
Smart Cam Equilibrium factor calcs
4
Here¡¯s a good paper on calculating equilibrium factors using a smart Cam amongst other techniques. However does anyone know how to get the smart Cam to report Po 218 and Po 214 in pCi/ml or DAC? All I can get is CPS. Dud
|
|
JIGSAW PUZZLE PROJECT MODULES presently available
The Show2Me Counter boards with updates installed, minus the daughter CPU module are ready in limited quantities. The V02 HVG/L (High Voltage Generator) with actual Ludlum supplied OEM transformers are ready, only 25 available The PRE-3 stuffed boards are ready, as are the bare PCB for the bold. We're putting together Experimenter Kits starting today, any member who was part of the JIGSAW project can ask for these as well as any member who has an experiment box in the works. Advanced members who were not in the original design group may join at any time and contribute knowledge to the rest of us. PLEASE BE AWARE: These are never to be used in a commercial product or sold alone, they may be gifted to another amateur scientist if you are finished with them, they may be freely used as demonstration hardware in videos and print, but please credit GEOelectronics. They are a gift from GEOelectronics, to be used as non-profit educational and personal Physics experiment/ research tools. Any use of a module or instrument provided by GEOelectronics should be credited as such. The JIGSAW PUZZLE PROJECT is a series of modules we built, they stack together to for any number of rad-detection related tasks, GM tube, Scintillator, even Proportional tube, The main module is a 400 to 2500V DC HV Bias supply, the PRE-3 is a set of 3 cascaded preamplifiers on a single pcb, user selectable line up, and contains the master gain control, while the "Show2Me" Counter pcb does the control and readout functions. There are other modules for special functions. Each pcb is a circuit element, they are discussed separately as circuit elements on the JIGSAW chat groups. "Systems Integration" group is the discussion of how to use the various modules into complete device, or to add one or more modules to an existing platform. One member used his PRE-3 to replace the entire damaged-beyond-repair preamplifier in a Ludlum bench scaler! JIGSAW Puzzle Project Links: /g/GEO-HVG/topics /g/GEO-PRE-3/topics /g/GEO-COUNTER/topics (Show2Me) /g/GEO-DCA/topics (Dual Channel Analyzer i.e. two separate Single channel analyzers) /g/GEO-DD/topics (Digital Divider, a stand alone accessory) /g/GEO-PRE-3/topics /g/GEO-SHOW2ME/topics /g/GEO-System-Integration/topics Our other science groups list: NOTE not all groups are presently populated or active. Some are place holders for yet to be published papers and experiments, some are archived posts from our former Yahoo Groups of the same name (back to 2003), and some are WIKIed already because we used up all the free memory spaced and moved on to the Page-2 (and so-on.) version until it gets WIKIed.. /g/Alpha-Beta-Gamma-Society/topics /g/AlphaBetaSpectrometry/topics /g/CDV700CLUB/topics /g/GammaSpectrometry-Archives/topics /g/GammaSpectrometryGroup/topics /g/GeigerCounterEnthusiasts-Archives/topics /g/GeigerCounterEnthusiastsGroup/topics /g/GEOelectronics/topics /g/GEO-Preamplifiers/topics /g/GeorgeDowell-HomeRadLab/topics /g/GeorgeDowell-MicrowaveOpticsLab/topics /g/GeorgeDowell-XRF-NDT-LAB/topics /g/High-Energy-Physics/topics /g/LENi-Geiger-Counter/topics /g/neonixie-l/topics /g/Nucleonics/topics /g/RadonThoronPhysics/topics /g/XRD/topics /g/XRF/topics /g/XRF-Page-2/topics /g/XRF-Page-3/topics /g/XRL/topics Have fun Groups Owner- George Dowell "Geo" Ham Radio> K0FF
|
|
[GeigerCounterEnthusiastsGroup] Anybody here win the EG&G Ortec 4001A Bin Chassis Nice NIM alpha spec for cheap. I hope someone in our circle got it. Geo
I have detectors so don¡¯t let that bother you next time Dud From: [email protected] [mailto:[email protected]] On Behalf Of Alan Jose Sent: Wednesday, July 6, 2022 4:08 PM To: [email protected] Subject: Re: [GeigerCounterEnthusiastsGroup] Anybody here win the EG&G Ortec 4001A Bin Chassis Nice NIM alpha spec for cheap. I hope someone in our circle got it. Geo I was tempted too but I figured the detector probably wasn¡¯t there or maybe bad hence no photo of it. Based on that I No Bid it. AlanJ
|
|
Anybody here win the EG&G Ortec 4001A Bin Chassis
2
Nice NIM alpha spec for cheap. I hope someone in our circle got it. Geo
|
|
Found on eBay :Nice cheap airflow regulator and filter bottle $25 shipped. Clever Eberline design, balanced/bypass regulator allows pump to run at constant speed. Looks like it can control up to 4 CFM. Some data attached, some of it within an instruction manual for a specific air flow detector, but same device used for all. There is a newer version Rap-3 which I am not familiar with. Something like this might be good for our current project and certainly for other such projects. Geo
|
|
Nick/Geo Here¡¯s a run of 4.7 hrs using the cheap Chinese PTFE 47mm filter in an Ultra metal filter holder. Compare the spectra with Nicks run using Geo¡¯s filter paper roll material. The PTFE has a very good peak shape compared to the roll material which has long tails and doesn¡¯t separate the Po218 and Po214 peaks. Note also that peak ratio¡¯s of the 218 and 214 on both are similar. Both show some Po212 at 8.78 and some beta or noise below 2 MeV. I haven¡¯t had any luck so far trying to run the Hi-Q filters as I get a filter error due to pressure differential. I¡¯ll run the Ultra filter next for comparison. Dud
|
|
Some pics at start, after an hour, and then a few hours later. Rough side of filter material facing up this time!
|
|
Exhaust fan has been running, but I kept the door closed except going in and out a few times.
|
|
Ran this over 5.5 hours. Shed exhaust fan off, closed up overnight, door closed during the entire run except for going in or out, so minimal air exchange.
|
|
Okay this has been running about 90 minutes. I turned off all the fans last night and the door was closed from about 11pm to 5pm. Factory filter installed. Using Dud's setting parameters. Haven't gotten the second unit wired up yet. By the way, should the hot lead be looped through and around the ferrite ring?
|
|
FOCUS: Air Filters for Radiation Detection
17
Let's use this thread to concentrate the air filter material, research, links and trials If you make a post that's part of another thread, try to condense the filter related items here also when convenient. This will help newcomers' (and forgetful old-timers) a place to catch up on our work, discoveries and idea evolution. Geo
|
|
Lab Impex units
4
Number 2 arrived at the office and was waiting for me this morning! So the seller on ebay came through at a cheaper price off-ebay system. $270+shipping+BS tax, not bad considering CHP Consultants is selling these for $5k. I wonder what the retail price is. We should ask Jeff.
|
|
Pictures of high school and college physics class demonstration vacuum chambers. These are simple enough to make at home, high vacuum is not needed> The gaskets are simple black rubber, the container looks like a soup pot from a steam table. Platforms hold the samples in the right orientation by clamping on those vertical rods.
|
|
This link is a good one to read to get your (our) feet wet: DIY Alpha Spectrometer | PhysicsOpenLab ( https://physicsopenlab.org/2016/10/28/diy-alpha-spectrometry/#:~:text=%20DIY%20Alpha%20Spectrometer%20%201%20Introduction.%20The,amplitude%20and%20therefore%20it%20requires%20an...%20More%20 ) He explains how to use a silicon sensor, how to bias it and what to do with the pulses it gives. The route he chose is a direct one, using the CREMET modules linked in another thread here. The stages are relatively simple compared to say, a Gamma Ray Scintillometer. Silicon diode is reverse-biased with a low DCV, protected from light because after all it is a photodiode, pulses are preamplified by a simple charged coupled amplifier (usually a FET), further modified by a shaping amplifier, then sent to a pulse height analyzer (PHA) of your choice. The above article uses a Theremino MCA, but it could be a single channel analyzer (SCA), a regular commercial Multichannel Analyzer (MCA), or some other system, such as an ordinary oscilloscope to vies the pulses. SCA's come in all shapes and sizes, some are internally preset as to which channel, they will count, while others are adjustable externally with a 10-turn mechanical counter, where each division is a certain number of keV. A few SCA's are set up with the normal WINDOW/THRESHOLD adjustments but include a range switch as well. With an adjustable SCA, you can manually scan the pulse train to note counts in any of the MeV areas being produced by the sample. Peter has already done this last test with the sensor/preamp board from his Alpha-6. A WINDOW/THRESHOLD setting is done like this: THRESHOLD (also called lower-limit-discriminator or LLD) is set to provide the lower end where nothing lower than that is detected WINDOW (also called ULD for upper-level-discriminator) set the upper end where nothing higher than that is counted. This control effectively sets the width of the window above the LLD which anything inside is detected and counter. The WINDOW automatically tracks with the THRESHOLD setting, so moving the latter will change both the upper and lower, keeping the width of the window that same always. It should be obvious that if the LLD dial has 100 divisions, and each division is worth say100keV, then moving it until a peak occurs will give a good idea of the energy of that peak by reading the dial. Truly accurate FWHM measurements are made on Gamma Spec. probes that way in the Home Lab. Today's linked schematic is of the front end of another Eberline CAM, the Alpha-3 Air Monitor. Like the Eberline A-6 CAM, the front end contains the preamp and shaping amp right at the detector, sending those pulses back to an analyzer board elsewhere in the device. There is a great write-up about all these stages and steps in the A-3 CAM manual, also linked below. I'm fortunate to have 2 of these A-3's in the Home Lab, with sensors. Geo
|
|
Yikes! Pu on eBay?
2
Smoke Detector §²§ª§¥1 RID-1 RID1 KI1 Ionizing Chamber Radioisotope RID-6M 194954703552
|
1 - 20 of 43
Image Name
Sat 8:39am
Sat 8:39am