Search found 1324 matches

by Dennis P Brown
Fri Jun 22, 2012 8:52 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Electrolysis of Heavy water - Drying the deuterium gas
Replies: 48
Views: 14549

Re: Electrolysis of Heavy water - Drying the deuterium gas

<t>Commercial purifiers use a palladium foil and both pressure and temperature on one side to drive it across; out comes 99.9995 purity. A pain to make since stainless steel tubing/fittings would be needed but simple compared to some of the things people build here. If I remember correctly, the temp...
by Dennis P Brown
Thu Jun 21, 2012 4:14 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: FAQ - Why no neutrons exit atoms in natural decay processes
Replies: 34
Views: 13933

Re: FAQ - Why no neutrons exit atoms in natural decay processes

Correct me if I am wrong but does not natural uranium (mix of the isotopes) undergo (rarely) spontaneous fission and release neutrons? As such, uranium ore should provide a low level emmision of neutrons. Of course, background cosmic ray effects would be an issue.
by Dennis P Brown
Thu Jun 21, 2012 1:04 am
Forum: Vacuum Technology (& FAQs)
Topic: Diffusion pump grounding
Replies: 2
Views: 1310

Re: Diffusion pump grounding

<t>I know little on fusors (and learned all I do know here) and what is best for grounding components so what I am saying just applies to average systems. <br/> <br/> I have a ground wire connected directly to my diffusion pump. Since my DP has only a two wire plug this was the safest solution. Your...
by Dennis P Brown
Wed Jun 20, 2012 3:32 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Could someone please mentor and assist me to build a fusor (Bay Area)
Replies: 9
Views: 3964

Re: Could someone please mentor and assist me to build a fusor (Bay Area)

<t>You need to understand that building a fusor that uses deuterium gas is a very difficult undertaking - also, without a neutron detector, it is pointless anyway. Deuterium gas is very hard to come by - your first effort should be to study and learn. Building a demo fusor (no deuterium and no fusio...
by Dennis P Brown
Wed Jun 20, 2012 10:03 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Could someone please mentor and assist me to build a fusor (Bay Area)
Replies: 9
Views: 3964

Re: Could someone please mentor and assist me to build a fusor (Bay Area)

<t>Preston,<br/> this is a great place to ask specific questions. Many people here are real experts in many areas (not me.) Carefully search the database here for information on fusors (basic design, required vacuum, power, gas, gauges, operation, etc.) and learn about what a fusor is and what it ta...
by Dennis P Brown
Wed Jun 20, 2012 2:55 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Nuclear Bomb Detector
Replies: 10
Views: 5088

Re: Nuclear Bomb Detector

That does appear all 70's vintage. I see some of the Caps have KV on them - a simple voltage multiplier?
by Dennis P Brown
Wed Jun 20, 2012 1:58 am
Forum: Vacuum Technology (& FAQs)
Topic: TCP040 Turbo Pump
Replies: 0
Views: 1014

TCP040 Turbo Pump

<t>The manual Pfeiffer set me gave me the jumpers for the old control unit and I used a default jumper info from the web site I posted in the other thread for the second, "newer" unit; the "newer" units works nicely - in faulting the old unit either I fixed a lose connection, or when I shorted a jum...
by Dennis P Brown
Tue Jun 19, 2012 12:41 pm
Forum: Files
Topic: Manual for the Pfeiffer TCP040 Controller and Turbo Pump (With jumpers and some repair specs)
Replies: 0
Views: 2371

Manual for the Pfeiffer TCP040 Controller and Turbo Pump (With jumpers and some repair specs)

This is the only manual Pfeiffer has for the TCP040 controller; this one has a 12 connector bus; some have a 20 connector bus and they do not know if this manual applies (I would think not but that is opinon.) This is a fairly big file 2.86 Mb
by Dennis P Brown
Tue Jun 19, 2012 12:38 pm
Forum: Vacuum Technology (& FAQs)
Topic: Manual for the Pfeiffer TCP040 Controller and Turbo Pump (Can't download to forum?)
Replies: 6
Views: 2155

Re: Manual for the Pfeiffer TCP040 Controller and Turbo Pump (Can't download to forum?)

<t>While the two controllers will both drive similar pumps, the TCP 121 has no jumpers at all (aside, you are correct that the cables/connections are the same between the controller and pump but this is not true for the power cable design - the 040 has fewer pins); also, the TCP 040 has numerous jum...
by Dennis P Brown
Tue Jun 19, 2012 9:54 am
Forum: Vacuum Technology (& FAQs)
Topic: Manual for the Pfeiffer TCP040 Controller and Turbo Pump (Can't download to forum?)
Replies: 6
Views: 2155

Manual for the Pfeiffer TCP040 Controller and Turbo Pump (Can't download to forum?)

At last I have obtained a copy of the basic manual - this does not apply to all TCP040 (of course ...) However, will apply for some of the series. This has been downloaded the file forum.