Search found 644 matches

by Andrew Seltzman
Tue Dec 31, 2019 2:53 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Amptek Digital Pulse Processor
Replies: 13
Views: 3829

Re: Amptek Digital Pulse Processor

Yes, supplying +5vdc to the pwr_ext pad on the PC 5 will power up the DP5 as well. I believe you can solder across a resistor to allow usb power, though I think the previously posted manual is for an older version of the board. From p22 on the manual (again I believe this manual might be for an olde...
by Andrew Seltzman
Sun Dec 15, 2019 3:16 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Amptek Digital Pulse Processor
Replies: 13
Views: 3829

Re: Amptek Digital Pulse Processor

Got 3x pulse processors and 1x of the Si-PIN diode. it pretty much works out of the box, make sure you install the winusb drivers or it won't connect via usb. I got a good XRF spectrum of stainless steel with this unit. I was using one of these photoionizer units as an x-ray source (9.5kev peak): ht...
by Andrew Seltzman
Sat Dec 07, 2019 10:57 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Amptek Digital Pulse Processor
Replies: 13
Views: 3829

Re: Amptek Digital Pulse Processor

There are also sellers selling the matching Si-pin diode: https://www.ebay.com/itm/NEW-Si-PIN-Detector-Element-with-PA230-Preamplifier-25mm-2-1mil-Be-Window/123346334252?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649 https://www.ebay.com/itm/NEW-Amptek-Si-PIN-Detector-w-PA230-PreAmp-25mm...
by Andrew Seltzman
Sat Dec 07, 2019 6:39 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Amptek Digital Pulse Processor
Replies: 13
Views: 3829

Re: Amptek Digital Pulse Processor

I bought 2 of the used ones, the seller did not respond to a $250ea offer.
From the Amptek site, it appears the power supply for the pin diode is on the PC5 board which is independent from the DP5 and can be removed entirely (or probably just disconnected).
by Andrew Seltzman
Sat Dec 07, 2019 3:45 pm
Forum: Announcements and Site Administration Topics
Topic: I want to help fix fusor.net!! (join up listing)
Replies: 19
Views: 4985

Re: I want to help fix fusor.net!! (join up listing)

I, Andrew Seltzman, want my editing privileges restored.

If we overwrite a broken attachment with a similar/newer/clearer file, will this confuse a later possibly automated fix?
by Andrew Seltzman
Fri Dec 06, 2019 4:16 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Amptek Digital Pulse Processor
Replies: 13
Views: 3829

Re: Amptek Digital Pulse Processor

Nice find, I'll have to buy some :)
by Andrew Seltzman
Thu Nov 28, 2019 11:31 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Spellman Power Supplies
Replies: 7
Views: 2653

Re: Spellman Power Supplies

See if this seller will sell just the negative output version.
https://www.ebay.com/itm/LNR0311-SPELLM ... SwJhdbkGRi
by Andrew Seltzman
Fri Nov 01, 2019 9:48 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Anode layer ion source. Operation pictures
Replies: 70
Views: 79656

Re: Anode layer ion source. Operation pictures

300C-350C is the typical upper limit for SmCo magnets.

If you were arcing a NST into the source it would either melt the anode ring or overheat the magnet.
by Andrew Seltzman
Sun Oct 27, 2019 12:48 pm
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Anode layer ion source. Operation pictures
Replies: 70
Views: 79656

Re: Anode layer ion source. Operation pictures

The pasternack BNC connectors are hermetically sealed and will hold a vacuum, though not UHV since they use an elastomer o-ring to seal to the base plate; not a real issue in the vacuum ranges that fusors/shuttering/deposition runs at though. If rectified to DC then yes an NST would work, though mak...
by Andrew Seltzman
Mon Oct 14, 2019 4:54 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Non-Corrosive and/or Dielectric Liquid Cooling?
Replies: 16
Views: 5497

Re: Non-Corrosive and/or Dielectric Liquid Cooling?

Teflon and nylon tube are both good, as are viton o-rings. You can get teflon and nylon ferules and fittings from swagelok.