Search found 236 matches

by richnormand
Mon Apr 15, 2013 10:12 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: DuMont 6292 PMT voltage divider
Replies: 5
Views: 2916

Re: DuMont 6292 PMT voltage divider

Thanks for the help Carl.
Now posted in the "files" section.
by richnormand
Mon Apr 15, 2013 10:08 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: DuMont 6292 PMT voltage divider
Replies: 5
Views: 2916

Re: DuMont 6292 PMT voltage divider

<t>Hi Arni,<br/> <br/> sorry for the slight delay as I had to do a bit of digging for this!<br/> <br/> The pdf has the DuMont scanned short form spec sheet from the era.<br/> Note that is has 39 tubes including your 6292. <br/> The K type were experimental and subject to change.<br/> <br/> At the en...
by richnormand
Fri Feb 22, 2013 7:33 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Board Mounted LiI(Eu) scintillators - repost in neutron detection
Replies: 26
Views: 21959

Re: Board Mounted LiI(Eu) scintillators - repost in neutron detection

Thanks for the input Richard.

Just ordered a small spool of tin indium solder from flea-bay.
Does it need something special for flux?

I'll post the result on my second (several pin missing altogether) unit when I try it.
by richnormand
Thu Feb 21, 2013 11:56 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Board Mounted LiI(Eu) scintillators - repost in neutron detection
Replies: 26
Views: 21959

Re: Board Mounted LiI(Eu) scintillators - repost in neutron detection

<t>I have used these two products (or similar formulations) over the years. <br/> <br/> The silver epoxy was used in building diode and RF sputter targets. It works well, can withstand some temperature, has decent thermal conductivity, but you need a rough and very very very clean surface to get goo...
by richnormand
Thu Feb 21, 2013 7:25 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Board Mounted LiI(Eu) scintillators - repost in neutron detection
Replies: 26
Views: 21959

Re: Board Mounted LiI(Eu) scintillators - repost in neutron detection

<t><<Can anyone tell us if the "all pins intact" grade devices are in condition to plug into a socket, or to solder onto a board? >><br/> <br/> As promised here is a photo of my unit. All pins accounted for, as you can see. Looks in good shape.<br/> Well packed and fast shipping.<br/> <br/> One cave...
by richnormand
Thu Feb 14, 2013 9:04 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Board Mounted LiI(Eu) scintillators - repost in neutron detection
Replies: 26
Views: 21959

Re: Board Mounted LiI(Eu) scintillators - repost in neutron detection

<t>""""Can anyone tell us if the "all pins intact" grade devices are in condition to plug into a socket, or to solder onto a board""""<br/> <br/> <br/> Got one of those "all pins intact" on the way. Will let you know once it shows up and see if the extra $$s were worth the trouble. By now it looks l...
by richnormand
Sat Feb 02, 2013 12:16 am
Forum: Vacuum Technology (& FAQs)
Topic: DC-HVDC Converters for Sustaining Ion Pumps
Replies: 5
Views: 2364

Re: DC-HVDC Converters for Sustaining Ion Pumps

<t>Hi Robert,<br/> <br/> Your PS may be OK, provided you are at a sufficiently low pressure when you start I think.<br/> I run an old Varian triode (negative supply) ion pump 911-5030 20l/s off a NIM bin Bertan 4000V supply. Since the PS is only 5mA max I have to pump it to mid 10^-5 Torr prior to s...
by richnormand
Mon Dec 31, 2012 5:12 am
Forum: Vacuum Technology (& FAQs)
Topic: D8A pump rebuild advice
Replies: 4
Views: 2394

Re: D8A pump rebuild advice

<t>That is the manual I found. <br/> Eventually I got hold of a hard copy with much better pictures.<br/> <br/> Aligning things was not an issue since the critical components are located by pressed in pushpins and the unit is well machined.<br/> <br/> I have found about 25 pictures taken during my r...
by richnormand
Sun Dec 30, 2012 11:07 pm
Forum: Vacuum Technology (& FAQs)
Topic: D8A pump rebuild advice
Replies: 4
Views: 2394

Re: D8A pump rebuild advice

<t>I have rebuilt a D16A years ago and will be happy to be of help. Took several pics at the time too. The D8A is very similar. Major rebuild kit from Dunaway was right on the button. Also get enough oil for two full loads.<br/> <br/> I'll look in my stuff but I remember getting a full service manua...