Search found 143 matches

by Q
Fri Mar 31, 2006 6:30 pm
Forum: Images du Jour
Topic: Archived - It's alive!
Replies: 15
Views: 8939

Re: It's alive!

way to go, adam!
congratulations on first plasma!!

Q
by Q
Thu Mar 30, 2006 12:45 pm
Forum: Vacuum Technology (& FAQs)
Topic: Still alive
Replies: 9
Views: 2858

Re: Still alive

hi adam,
sounds like you've got a good vacuum station to work with.
hopefully it'll work well for you. i hope to see some exciting furion experiments in that chamber!

Q
by Q
Mon Mar 20, 2006 12:16 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: NaI scintillator resolution and rejuvenation
Replies: 25
Views: 6706

Re: NaI scintillator resolution and rejuvenation

<t>thanks richard, <br/> oops, thallium... not titanium. i knew it was one of those "t" elements. to many days with not enough sleep. <br/> anyway, yeah, thallium isn't a substance that i really want to mess with in the current lab setup. but do i understand correctly that one could dope a NaI cryst...
by Q
Sun Mar 19, 2006 10:29 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: NaI scintillator resolution and rejuvenation
Replies: 25
Views: 6706

Re: NaI scintillator resolution and rejuvenation

<t>hmmm, a home grown scintillation crystal!<br/> very interesting! since i'm not at the sprctroscopy stage yet, i may give that a try. <br/> one question that comes to mind though, aren't NaI (and other crystals as well) usually doped with some other metal like titanium? how would one go about doin...
by Q
Wed Mar 15, 2006 3:58 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Mounting Frank's BGO Crystals to a PMT
Replies: 4
Views: 1599

Re: Mounting Frank's BGO Crystals to a PMT

just got mine as well, and yes, thanks frank!
actually i was thinking about trying to use a photodiode to make a super small detector. problem is finding one with the right spectral responce.
but if that doesn't work i have a small 1" pmt that i'll probably use.

Q
by Q
Fri Feb 24, 2006 10:56 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: GAMMA HIGH VOLTAGE
Replies: 22
Views: 6427

Re: GAMMA HIGH VOLTAGE

<t>well, i am not familure with this unit, so i cant say if it will make a good fusor supply. but if it is at a good price, i'd say go ahead and get it. i'm sure there are plenty of other expiriments that you could use that for. (assuming that you are knowlegable about high voltage safety, of course...
by Q
Mon Feb 20, 2006 12:51 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: building a scintillator
Replies: 25
Views: 4484

Re: building a scintillator

<t>thanks anonymous,<br/> i have checked to see if there was anything around that might cause these pulses, so far, i've come up with nothing. the timing isn't exactly 10 seconds apart, but roughly some where between 6 and 15 seconds, sometimes as often as often as 2 in one second, but this is rare....
by Q
Sat Feb 18, 2006 1:15 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: building a scintillator
Replies: 25
Views: 4484

Re: building a scintillator

<t>hmmm, interesting. i had forgotten about cosmic sources... (another "duh" moment)<br/> well, i am at approximately 2000 feet above sea level and the detector is 3 inches square. that might account for it, especially since the much larger pulses seem to be constant wether the check source is prese...
by Q
Sat Feb 18, 2006 6:26 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: building a scintillator
Replies: 25
Views: 4484

Re: building a scintillator

<t>ever have one of those "duh!" moments where you realize you've beaten that dead horse into pulp for no good reason?<br/> well, my hv supply for the scintillator project still puts out some ripple, but you know what? it doesn't matter! the reason i was having problems earlier is because my ripple ...
by Q
Mon Feb 13, 2006 4:45 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: An energy producing Fusor
Replies: 18
Views: 5701

Re: An energy producing Fusor

<t>well, i'm not sure that i remember the discussion correctly, but i beleive that it was determined that the current spikes were caused by thermionic electron 'avalanch'; where the grid gets hot enough to start 'boiling off' electrons which are then accelerated away from the center of the fusor tow...