Search found 237 matches

by richnormand
Mon Apr 15, 2013 10:23 pm
Forum: Files
Topic: DuMont specs for 39 types of PMT
Replies: 0
Views: 1217

DuMont specs for 39 types of PMT

DuMont specs for 39 types of PMT and a DuMont dynode chain for selected
type.
by richnormand
Mon Apr 15, 2013 10:12 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: DuMont 6292 PMT voltage divider
Replies: 5
Views: 2526

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: 2526

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: 20127

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: 20127

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: 20127

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: 20127

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: 2015

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: 1999

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...