Search found 51 matches

by Brian_Gage
Mon May 28, 2012 12:05 am
Forum: Vacuum Technology (& FAQs)
Topic: KF flange polishing
Replies: 15
Views: 6795

Re: KF flange polishing

Here's hoping this isn't drifting too far off the subject, but I'm a rockhound and your polishing description was reminiscent of the stages for polishing rock slices or cabs. Very interesting. Congradulations.
Regards, Brian
by Brian_Gage
Thu May 24, 2012 1:38 am
Forum: Vacuum Technology (& FAQs)
Topic: Diff pump
Replies: 23
Views: 6395

Re: Diff pump

This question has been answered numerous times. Plastic or glass cannot or should not be used for anything more than a demo plasma chamber.
Also, as mentioned, as fusors go, plastic anywhere will either not withstand the heat or simply contaminate the process.
by Brian_Gage
Thu Apr 26, 2012 8:26 am
Forum: Fusion --- Past, Present, and Future
Topic: More fusion hype?
Replies: 15
Views: 7296

Re: More fusion hype?

Has anybody ever totaled up how many billions, or is it trillions have been spent world-wide on the "hot fusion" pipe-dream?
What would all those scientists do and say if some amateur fusor inovation produced a net energy gain?
Brian
by Brian_Gage
Wed Feb 15, 2012 2:00 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron Capture/Beta Decay Detection?
Replies: 25
Views: 7405

Re: Neutron Capture/Beta Decay Detection?

<t>Greetings Andrew and welcome to the forum.<br/> <br/> Your question puzzles me. My understanding is that detection of neutrons is only possible by neutron capture. Perhaps you might provide some amplification as to what you mean? Were you thinking of some method of neutron confinement?<br/> <br/>...
by Brian_Gage
Tue Feb 14, 2012 7:12 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Simple GM probe construction, end-window tube
Replies: 12
Views: 4437

Re: Simple GM probe construction, end-window tube

<t>Well, I hadn't considered nickel plating. A friend suggested a fellow who does chrome for motorcycle and engine parts. I'll have to check on prices and availability. Next project wit detectors will involve a 2.5" diameter tube and the Phillips PMT I purchased from Richard. I'm hoping to have more...
by Brian_Gage
Tue Feb 14, 2012 4:40 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Simple GM probe construction, end-window tube
Replies: 12
Views: 4437

Re: Simple GM probe construction, end-window tube

<t>Hi Guys,<br/> Thanks for all the feedback. I think the voltage issue with BNC's has pretty much been resolved.<br/> <br/> Any comments about the probe case? Not too fancy. Joseph, who builds harps for a hobby, mentioned using stainless steel, then surprised me with copper. Painting doesn't appeal...
by Brian_Gage
Tue Feb 14, 2012 3:44 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Simple GM probe construction, end-window tube
Replies: 12
Views: 4437

Re: Simple GM probe construction, end-window tube

<t>Hi John,<br/> Thanks for the heads up.<br/> No, I didn't know that about the BNC connectors. I'll check with another club member who is the electronics buff. He's helping me put together the HV package, cable and connector. We will make certain we have the right connector for the 750 volts this p...
by Brian_Gage
Tue Feb 14, 2012 1:28 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Simple GM probe construction, end-window tube
Replies: 12
Views: 4437

Simple GM probe construction, end-window tube

<t>I recently purchased a 6" long by 3/4" brushed steel, end-window GM tube from Richard Hull. A local amateur club member helped me construct a probe housing after I gave him a general outline of what I desired. A few days later, he presented me with a capped length of 1" diameter copper pipe housi...
by Brian_Gage
Tue Feb 14, 2012 12:54 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: F.I.C.S. Construction
Replies: 50
Views: 14805

Re: F.I.C.S. Construction - First Plasma

<t>Okay, great descriptions. I can visualize the coffee perkalator analogy, though this stack of glass and aluminum disks sound more like a stovepipe. Is the tungsten sphere cathode on the top of this stack? And, is there something more above this? As in, which end, top or bottom is the vacuum conne...
by Brian_Gage
Mon Feb 13, 2012 3:00 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: F.I.C.S. Construction
Replies: 50
Views: 14805

Re: F.I.C.S. Construction - First Plasma

<t>Thanks Steven,<br/> Your description not only makes sense, it is quite graphic.<br/> Is there any problem during operation of gassing from the latex glue? Or, does this central flight tube hole contain an isolating glass drift tube?<br/> Is this stack of CD-sized disks contained inside a fusor cy...