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Re: Geo's filter material trial


 

On a plane to Lexington (well,? Atlanta first) and flying back Wednesday.? When I pulled the card out after posting,? I realized I'd instants the filter material smooth side up...? Will run again the other way after I get back.? ?Hoping I can take Friday off as planned to get ready for the long drive.? ?If that works out,? I should be able to run some more that day too.

It's been close to 100 in the shop lately,? and the stainless cabinet seems to be very hot to the touch.? ?I'll do a temp check,? maybe take thermal images...

I also plan to pull the CF card out of #2 and copy the contents to laptop before changing settings.? ?It was set on eastern time and was off by about half an hour.?

While wiring that one,? I noticed the data line going from the RJ45 on the bottom runs to a connector on the bottom of the circuit board on the right side,? about a third of the way down.? ?There's also an unused RJ45 on top of the circuit board under the black plastic shield which is not visible normally.?

On filter cards,? I need to find a better way to punch them for cleaner 1" holes.? I do have a cool little punch set of i can find it that might be better than the gasket punch or might just need a better backup using that one.? Haven't tried the arbor press yet either,? just popping it with a rubber mallet.

Here it is.? ?Bummer only goes to 3/4"...



Not sure if would work better anyway in paper.? Though my machining skills are strictly amateur metal butcher class,? maybe I could make something similar for 1".

On Mon, Jun 27, 2022, 11:51 AM Dude <dfemer@...> wrote:

Nick,

A rather strange spectra. The Po-214 at 7.6 Mev has a strange shape and the beta down somewhere around 1.8 is distorting the curve fit. I wonder if that has an effect on the Rn calc and where is the Beta coming from? These tails don¡¯t look right. How dirty was this filter?. Re run this again with the proper filter same time same closed conditions. I suspect it¡¯s possible that Geo filter material is for airborne particulates and gamma and may not be suitable for alpha work.

Dud

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From: [email protected] [mailto:[email protected]] On Behalf Of Nick Andrews
Sent: Sunday, June 26, 2022 6:49 PM
To: [email protected]
Subject: Alpha and Beta particle nuclear decay studies. Geo's filter material trial

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