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Re: Joe Gayo's lab tour

Posted: Sat Jul 27, 2019 2:39 am
by Joe Gayo
Getting Serious ... added a turbo and RGA
IMG_2249.jpg
IMG_2250.jpg

Re: Joe Gayo's lab tour

Posted: Sat Jul 27, 2019 11:45 pm
by Joe Gayo
Initial Pump Down versus Base Pressure After Multiple Heating Cycles
Pressure (Torr).png
Before and After Run
Pressure (Torr) (1).png

Re: Joe Gayo's lab tour

Posted: Sat Jul 27, 2019 11:52 pm
by Scott Moroch
Are you sure your units are right? I have never heard of anyone reaching 1E-10 with a turbo. Best I have seen is E-8. Perhaps someone with more experience can weigh in.

What are the time units? Minutes? Days?

Nice work though!

Scott

Re: Joe Gayo's lab tour

Posted: Sun Jul 28, 2019 12:16 am
by Joe Gayo
The x-axis is AMU ... these are all single scans that take about 1 minute

Re: Joe Gayo's lab tour

Posted: Sun Jul 28, 2019 12:45 am
by Scott Moroch
Ah, I see. I apologize, I misunderstood. Thought time was the x-axis . Nice plots.

Scott

Re: Joe Gayo's lab tour

Posted: Sun Jul 28, 2019 6:08 am
by Richard Hull
SRS! Top drawer stuff. I picked up a brand new, in-box SRS 0-3kv digital controlled PMT, Proportional tube power supply. List price $1900 at a hamfest for $250. Best supply I have ever seen. I powers my 5" Bicron NaI:Tl gamma spec tube into my canberra gamma spec. with it.

I have always lusted after an SRS RGA but lacked the $3000 to own a new one. But...who an I kidding... I would have to completely redo my system to hit 10e-6 torr.

Great system Joe ...

Richard Hull

Re: Joe Gayo's lab tour

Posted: Sun Jul 28, 2019 9:18 am
by ian_krase
I actually wonder what the cheapest RGA out there is. It looks like many are available for a couple thousand...

Re: Joe Gayo's lab tour

Posted: Sun Jul 28, 2019 4:35 pm
by Joe Gayo
After a high power run, interesting peaks at 5 and 6 amu
Peaks5-11.png

Re: Joe Gayo's lab tour

Posted: Mon Jul 29, 2019 12:27 am
by Joe Gayo
More interesting data ... any guesses for amu 21 (DTO ?)
D2 Plasma Run - 90kV 15mA - 2.8mPa - 3.03E7 n_sec.png

Re: Joe Gayo's lab tour

Posted: Mon Jul 29, 2019 2:34 am
by Dan Knapp
D2OH+