Search found 344 matches

by tligon
Fri Aug 05, 2011 9:44 pm
Forum: Fusion --- Past, Present, and Future
Topic: Arrested for reactor building - What type?
Replies: 5
Views: 3474

Re: Arrested for reactor building - What type?

<t>And my understanding is that he was boiling the brew in sulfuric acid. I have no doubt there was no significant nuclear reaction going on, just a boiling acid accident.<br/> <br/> The brew seems to have contained an alpha emitter (americium) and beryllium, so I suppose there were a few neutrons p...
by tligon
Tue May 10, 2011 6:37 pm
Forum: Books & References
Topic: Science Fair Season book review
Replies: 0
Views: 2659

Science Fair Season book review

<r>I'm probably posting this in the wrong spot, so if someone with admin rights wants to move it, be my guest.<br/> <br/> Last night I was browsing a recent edition of Science News, and found I had an indirect contribution. <br/> <br/> The book reviews included a review of a new book called "Science...
by tligon
Tue Dec 07, 2010 2:00 am
Forum: Vacuum Technology (& FAQs)
Topic: Can a house hold copper pipe hold a vacuum?
Replies: 8
Views: 3820

Re: Can a house hold copper pipe hold a vacuum?

<t>Sure it will! <br/> <br/> Pulling a vacuum on copper is the best possible test of your "sweating" skills. Any tiny leak in the solder will show you your lack of skill. I have not tried lead-free solder with a vacuum yet, but silver soldering is used in vacuum work and ought to be slightly better ...
by tligon
Tue Aug 24, 2010 3:14 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Good earth ground
Replies: 13
Views: 4725

Re: Good earth ground

<t>A good thought, that. My drain field is already in but I know where it is.<br/> <br/> The codes where mine is say it is three feet underground. My system uses four parallel 100 ft trenches, 10 ft apart, each 3' wide, and with a perforated pipe down the middle. That should be a pretty easy target ...
by tligon
Mon Aug 23, 2010 4:02 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Good earth ground
Replies: 13
Views: 4725

Re: Good earth ground

<t>That "bounce" problem is interesting. We used to have two buildings, a concrete "blockhouse" and a metal building. One day the metal building was hit by lightning. The entire structure evidently "bounced" at least several thousand volts. There was no electrical damage in that building.<br/> <br/>...
by tligon
Mon Aug 23, 2010 3:56 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Good earth ground
Replies: 13
Views: 4725

Re: Good earth ground

<t>The last time I looked at an electric code it was actually calling for two ten foot ground rods, some specified distance apart. There is a minimum spec for the ground conductor to the rods which is worth looking up. Probably 6 AWG at present.<br/> <br/> Be aware that the requirements for a buildi...
by tligon
Mon Aug 09, 2010 6:13 pm
Forum: Vacuum Technology (& FAQs)
Topic: cheap alternative oil mist filter
Replies: 14
Views: 4455

Re: cheap alternative oil mist filter

<t>My pump experienced a temporary refusal to pump this weekend. I've seen it before and always figured it was such a lockup, but attributed it to pump oil rather than condensation. Whichever it was, cracking a QF fitting to let air in for about 5 seconds cleared it up. If a pump experiences a hydro...
by tligon
Thu Aug 05, 2010 1:08 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: With a Bigger Hammer...
Replies: 22
Views: 4853

Re: With a Bigger Hammer...

<t>Dave, <br/> <br/> Having electrons and ions at different kinetic energies is the whole point in the Polywell. <br/> <br/> Let's say the target is to have boron converging in the center at 500 keV. A boron nucleus has a charge of +5 if fully stripped of electrons, so you can achieve this energy wi...
by tligon
Thu Aug 05, 2010 12:55 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: With a Bigger Hammer...
Replies: 22
Views: 4853

Re: With a Bigger Hammer...

<t>My understanding is that even the pros are more likely to talk about burning DT than actually do it. The usual approach at government fusion labs is to run tests with DD, then calculate what would result from DT.<br/> <br/> It makes one wonder if real DT powerplants could ever be viable. If the f...
by tligon
Wed Aug 04, 2010 11:30 pm
Forum: Vacuum Technology (& FAQs)
Topic: This pump look good?
Replies: 4
Views: 1696

Re: This pump look good?

<t>You might get 63 kV out of a doctored NST, but if it is only a 15 kV 30 mA unit it still will be seriously underpowered. There would be so little current behind it I don't see how it would work well.<br/> <br/> My 15 kV 60 mA unit, modestly overdriven on the primary, can theoretically put out 13 ...