Search found 37 matches

by gamempire
Tue Oct 13, 2009 2:34 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Chamber design?.....
Replies: 10
Views: 5748

Re: Chamber design?.....

<r>Hi Ash,<br/> <br/> You mentioned that you'd be using your chamber for other things, which definitely helps justifying the time and/or cost in getting a nice vacuum chamber. As my fusion project has started to come to a close for the time being as I'm now in grad school, I've been starting to work...
by gamempire
Wed Feb 25, 2009 10:22 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: A dead BF3 Tube? :(
Replies: 6
Views: 2501

Re: A dead BF3 Tube? :(

<t>Not worried about calibration just yet. I just need a working detector. Heck if you did get it working, just a comparison graph of cpm between one of your detectors and mine versus distance away would be helpful. Some of the EE professors here at GWU have collaborators at NIST who said they'd gla...
by gamempire
Wed Feb 25, 2009 9:47 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Vacuum Chamber Purchase/Size
Replies: 14
Views: 4765

Re: Vacuum Chamber Purchase/Size

<r>Tyler,<br/> <br/> Please see this thread, where an active discussion is ongoing about laser cut grids: <URL url="http://www.fusor.net/board/viewtopic.php?f=6&t=2914#p17937"><LINK_TEXT text="viewtopic.php?f=6&t=2914#p17937">http://www.fusor.net/board/viewtopic.php?f=6&t=2914#p17937</LI...
by gamempire
Wed Feb 25, 2009 9:40 pm
Forum: Images du Jour
Topic: Archived - promised demo-fusor pictures
Replies: 10
Views: 5552

Re: promised demo-fusor pictures

<t>Adrian,<br/> <br/> Those sparks you were seeing were probably arcs from rough edges or such on the wire (probably created from repeated heating and cooling from where you removed it from). After a few hours of operation, you'll stop seeing the sparks. <br/> <br/> A good place to buy the stainless...
by gamempire
Wed Feb 25, 2009 9:34 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: A dead BF3 Tube? :(
Replies: 6
Views: 2501

Re: A dead BF3 Tube? :(

<t>Thanks for the reply Richard. I'll be sure to let everyone know how it goes. <br/> <br/> I have to ask, what would be the best gamma source I can buy for testing do you think? United Nuclear has several options. I assume Cobalt60 would be the best choice because of it being a strong neutron sourc...
by gamempire
Wed Feb 25, 2009 9:26 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Lithium vapor injected into fusor with deuterium fusion initiation.
Replies: 27
Views: 6077

Re: Lithium vapor injected into fusor with deuterium fusion initiation.

<t>Dave,<br/> <br/> As my mind has been completely elsewhere the last couple weeks, I completely forgot to mention the sputtering issues. I thank you for doing so. Tungsten would definitely cause some severe sputtering issues. The only way we'll find better material for the electrodes is by experime...
by gamempire
Wed Feb 25, 2009 7:12 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Lithium vapor injected into fusor with deuterium fusion initiation.
Replies: 27
Views: 6077

Re: Lithium vapor injected into fusor with deuterium fusion initiation.

<t>For the grid in the picture, I used 316 stainless, .055" thick. I cut 3 rings with notches in them. I've attached a drawing I did for inclusion in a report. <br/> <br/> The only way I've managed to make an electrical connection is welding a piece of SS rod (1/8" works) to one of the joins on the ...
by gamempire
Wed Feb 25, 2009 2:11 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: A dead BF3 Tube? :(
Replies: 6
Views: 2501

Re: A dead BF3 Tube? :(

<t>Thanks for the reply Carl.<br/> <br/> I did increase the voltage (up from 1500 to around 1700, tube spec is from 1500 to 1800), and decreased the threshold (it should be around 3mv). However, I wasn't able to do it while next to the neutron source, because of NRL's policy on radiation exposure to...