Search found 2073 matches

by Steven Sesselmann
Wed Feb 14, 2018 7:25 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Natural Uranium Spectroscopy.
Replies: 3
Views: 154

Re: Natural Uranium Spectroscopy.

Ben, Just adding to Richards answer, you can find the common U238 x-rays etc and other isotopes of Uranium here. http://nucleardata.nuclear.lu.se/toi/nuclide.asp?iZA=920238 http://nucleardata.nuclear.lu.se/toi/ A couple of low intensity gamma rays , which are mostly drowned out by other gamma and x-...
by Steven Sesselmann
Sun Feb 11, 2018 10:36 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: classic example of bad neutron metrology
Replies: 1
Views: 103

Re: classic example of bad neutron metrology

Richard,

Apart from the questionable metrology, I would be concerned about how the bubble detector behaves at low atmospheric pressure/temperature. The idea of using a bubble detector is fine, but it would have to be enclosed inside a chamber at constant 1 ATM pressure and temperature.

Steven
by Steven Sesselmann
Thu Feb 08, 2018 2:51 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron activation with 10 mCi Po + Be
Replies: 7
Views: 984

Re: Neutron activation with 10 mCi Po + Be

To increase your neutron production you might consider placing the static eliminators, beryllium target, and sample in a small HDPE vacuum chamber. Very nice looking job, I was wondering when someone would do this, it makes a lot of sense to give those alpha particles a fighting chance to hit their...
by Steven Sesselmann
Fri Dec 29, 2017 10:23 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: FICS II Planning and construction
Replies: 64
Views: 14473

Re: FICS II Planning and construction

The noise level on your system is rather high, appears on the order of most your signals, and while that is understandable for a poorly shield detector it is surprising for a vacuum reading or voltage value. Current measurements just should not exhibit noise of that level at all since you are measu...
by Steven Sesselmann
Fri Dec 29, 2017 7:40 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: FICS II Planning and construction
Replies: 64
Views: 14473

Re: FICS II Planning and construction

I did another three runs today, and collected the data in the usual manner. Not entirely sure what the data is telling me as there is still some variances between runs. The first run was on a cold start and immediately output a lot of neutrons, then slowly tapered off, the third run was more steady....
by Steven Sesselmann
Wed Dec 27, 2017 10:31 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: FICS II Planning and construction
Replies: 64
Views: 14473

Re: FICS II Planning and construction

Dennis, I am not in any way suggesting that this version of FICS is or will be or will be producing useful energy, it is just a proof of concept. In reality the reactor is consuming around 125 watt of power (2.5 mA at 50 kV), most of which seems to be deposited as heat in the zener diodes. The actua...
by Steven Sesselmann
Tue Dec 26, 2017 9:48 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: FICS II Planning and construction
Replies: 64
Views: 14473

Re: FICS II Planning and construction

Steve, a short term spike may be real or could be an artifact; interesting but one needs to properly explain the spike through experimental methods and more critically, consistently reproduce that effect. Dennis, I have been in this game for long enough, and I agree it needs more investigating, but...
by Steven Sesselmann
Tue Dec 26, 2017 12:33 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: FICS II Planning and construction
Replies: 64
Views: 14473

Re: FICS II Planning and construction

Hi guys, After letting the zener diode cool down, I gave it another short run and I observed an interesting event I thought I would share.. Look at what happens to the neutrons and the current at 136 seconds into the run. Could this be Fusion Induced Charge Separation ? Steven 171226-neutron-event.P...
by Steven Sesselmann
Mon Dec 25, 2017 11:55 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: FICS II Planning and construction
Replies: 64
Views: 14473

Re: FICS II Planning and construction

Dennis and Richard, Thanks for feedback, after all these years I have toughened up to Richards cynical outlook :) I don't agree with Richards evaluation of the zener current, because it is useful electrical power and instead of bleeding it to ground through a resistor I could if I really wanted to, ...
by Steven Sesselmann
Mon Dec 25, 2017 8:09 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: FICS II Planning and construction
Replies: 64
Views: 14473

Re: FICS II Planning and construction

CHRISTMAS GREETINGS First of all a Merry Christmas to all you crazy fusioneers out there, who like me find the festive season to be the perfect time for an antisocial introvert escape into the world of experimental science :) LONG STRING OF FAILURES For those of you who are new to the forum I have ...