Search found 58 matches

by Greg Courville
Tue Apr 26, 2016 1:25 pm
Forum: Images du Jour
Topic: Fusion Claim- Kuba and Noah
Replies: 17
Views: 7094

Re: Fusion Claim- Kuba and Noah

Congrats! Nice to see that you made it.

That pump must have been hungry! I don't think I ever managed to move the cylinder gauge more than an hair in several hours of D2 operation...
by Greg Courville
Tue Mar 01, 2016 8:06 am
Forum: Images du Jour
Topic: Chamber wall rainbows
Replies: 10
Views: 3959

Re: Chamber wall rainbows

Greg or more likely deposits of tungsten and general contaminants that are thin enough to interfere with differing wavelengths of light hence the rainbow hues. Thin-film interference was my first thought as well. However, it struck me that the colors are out of order (yellow to violet to blue). XXX...
by Greg Courville
Tue Mar 01, 2016 1:14 am
Forum: Images du Jour
Topic: Chamber wall rainbows
Replies: 10
Views: 3959

Chamber wall rainbows

Last night I unbolted a couple of flanges on my chamber and a glint of color caught my eye. I shone a flashlight inside and saw this: fusor_depo_colors.jpg Quite a neat rainbow effect going on. I'm going to take a wild stab and speculate that we're looking at a range of oxide species formed by tungs...
by Greg Courville
Mon Feb 15, 2016 8:47 pm
Forum: Images du Jour
Topic: Greg Courville Neutron Club entry Feb 2016
Replies: 9
Views: 5468

Re: Greg Courville Neutron Club entry Feb 2016

The only place I saw a kV value is a chart in your screen capture (yay for cygwin!) which appears to settle down around -16 kV. HV is in the third subplot from the top (the one with the color-coded time windows drawn over it). If that's really RMS, with the minus sign added, then the amplitude exce...
by Greg Courville
Sun Feb 14, 2016 9:28 pm
Forum: Images du Jour
Topic: Greg Courville Neutron Club entry Feb 2016
Replies: 9
Views: 5468

Re: Greg Courville Neutron Club entry Feb 2016

Here's some more about those detector pulses. One thing that stands out is that garbage pulses get a lot worse at higher power levels. Most of them had a fairly distinctive shape to them and many were associated with an audible crackle or similar event. **Event disposition summary** Region 0: 4 garb...
by Greg Courville
Sun Feb 14, 2016 9:23 pm
Forum: Images du Jour
Topic: Greg Courville Neutron Club entry Feb 2016
Replies: 9
Views: 5468

Re: Greg Courville Neutron Club entry Feb 2016

Thanks, Rich! I was surprised by the zip tie failures as well, but these were novelty-grade neon-colored zip ties from the hardware store, not mil-spec, so I wouldn't be surprised if the makeup was something other than pure high-quality nylon resin. I read up a little on correction curves for therma...
by Greg Courville
Sun Feb 14, 2016 4:26 am
Forum: Images du Jour
Topic: Old turbopumps
Replies: 0
Views: 850

Old turbopumps

Presented without further comment.
inrush.png
by Greg Courville
Sun Feb 14, 2016 3:03 am
Forum: Images du Jour
Topic: Greg Courville Neutron Club entry Feb 2016
Replies: 9
Views: 5468

Greg Courville Neutron Club entry Feb 2016

Hello all, After an awfully long time away, here is a fusion report. I started building a fusor some time in 2006 and didn't end up getting around to trying for fusion before running off to university (and subsequently taking a job in a research lab). I left behind a machine that was more-or-less fu...
by Greg Courville
Sat Jan 30, 2016 9:05 pm
Forum: Images du Jour
Topic: Deuterium run March 2015
Replies: 4
Views: 1442

Re: Deuterium run March 2015

Hi Richard, I agree, it's not a very compelling dataset. I can re-bin the count plot (counts were recorded as individual timestamped events), but I'm still missing a real solid control to demonstrate genuine neutron production. The fact that I didn't have the presence of mind to just stick with D2 a...
by Greg Courville
Fri Jan 29, 2016 9:12 pm
Forum: Images du Jour
Topic: Deuterium run March 2015
Replies: 4
Views: 1442

Re: Deuterium run March 2015

Thanks for the kind words, Richard. A couple weeks from now I hope to have some time to go over everything that was recorded and give it a proper critical analysis. For the moment, all I have is a somewhat suggestive plot, which I have attached. A full report will hopefully follow, but here are a fe...