Search found 2329 matches

by Carl Willis
Mon Jan 20, 2014 5:19 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Propane tank
Replies: 8
Views: 3106

Re: Propane tank

$500 is doable for a chamber...be sure to read the archives. The real problem is "with no support from my parents." Since you are 13 years old, chances are you rely on almost everything from your parents. Your workspace, your funds, your safety, your recreational time, not to mention your basic sust...
by Carl Willis
Sun Jan 19, 2014 11:54 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Propane tank
Replies: 8
Views: 3106

Re: Propane tank

I'm sure the tank is strong enough to support an internal vacuum. In propane use, they are pressurized to ~100 PSI. Atmospheric pressure is only about 15 PSI. There could be other problems that would render a propane tank poorly suited for a fusor vacuum chamber: the mercaptans used to odorize propa...
by Carl Willis
Sun Jan 19, 2014 10:59 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Hydrogen operation
Replies: 5
Views: 2400

Re: Hydrogen operation

Under appropriate conditions, all of the light natural nuclei can react in fusion reactions. But your interest is in doing fusion cheaply and detectably. That limits you to deuterium, the only substance ever used successfully in hobby IEC experiments. Academic and professional research labs sometime...
by Carl Willis
Fri Jan 17, 2014 10:37 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: creating the grid
Replies: 1
Views: 1271

Re: creating the grid

Arya, You would be well-served by browsing archived discussions about successful projects to get a good idea of what materials and techniques have been used to fabricate grids. The recent Make Magazine article doesn't necessarily reflect the known best practices emerging from more than a decade of r...
by Carl Willis
Tue Jan 14, 2014 12:16 am
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Pulsotron-2 new device working
Replies: 30
Views: 14254

Re: Pulsotron-2 new device working

This discussion is more than four years old and is about a project that is even older. It appears that the discussion ended when Javier was asked to engage with more details and data. The only thing new right now is that he wants endorsements so he can put papers on Arxiv. I don't know that anyone h...
by Carl Willis
Sat Jan 04, 2014 6:26 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: absorbed dose etc
Replies: 7
Views: 3084

Re: absorbed dose etc

John, the mean (50%) lethal dose for acute whole-body exposure is around 5 Gy and leads to death within a month or two after exposure via death of the hematopoietic (blood-forming) system. This assumes the radiation can penetrate the body and irradiate the bone marrow. There are other awesome ways t...
by Carl Willis
Mon Dec 30, 2013 7:04 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Another look at plain old scintillaing plastic.
Replies: 10
Views: 4354

Re: Another look at plain old scintillaing plastic.

The downside of the plastic scintillator is its sensitivity to gammas, per Richard's remarks. However, this is not just a case of sensitivity, but selectivity: pulses made by low-LET particles (betas and Compton electrons, chiefly) of a given energy are much larger than those made by high-LET partic...
by Carl Willis
Sat Sep 28, 2013 7:35 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Flyback zvs plus multiplier
Replies: 65
Views: 18093

Re: Flyback zvs plus multiplier

Hi Isaac, This approach generically describes the design principle on which many of the commercial HV supplies operate. In terms of the hobby circuits floating around, the answer is a qualified "yes." The Mazzilli circuit (Royer oscillator variant) can deliver hundreds of watts; the half-bridge driv...
by Carl Willis
Thu Sep 26, 2013 2:21 am
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Anisotropic Neutron Emission - Discussion
Replies: 17
Views: 8594

Re: Anisotropic Neutron Emission - Discussion

I'm glad the apparent confusion in this thread got sorted out. To reiterate / summarize: When it's observed that the neutron field around a fusion apparatus is not symmetric, "anisotropy" (referring to the neutron-producing nuclear reaction) is very low on the list of explanations. According to the ...
by Carl Willis
Fri Sep 20, 2013 9:02 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: NIMs query
Replies: 7
Views: 2890

Re: NIMs query

The NIM standard is old, but NIM remains a very popular and versatile platform that is supported by a wide array of modules in current production (Canberra, Ortec, etc.) A good one-stop reference for learning about nuclear electronics and NIM specifically is Glenn Knoll's "Radiation Detection and Me...