Search found 1508 matches

by Dennis P Brown
Thu Nov 19, 2020 11:40 am
Forum: Images du Jour
Topic: First turbo pumpdown - smooth sailing!
Replies: 19
Views: 630

Re: First turbo pumpdown - smooth sailing!

Most ceretainly add a good fan; while 60 C is an acceptable 'bake out' temp for a turbo its is too high for typical operation. A fan will also extend the useful life of the turbo. Waiting to reach 0.1 milli-torr to turn on the turbo isn't necessary. I routinely start mine anywhere from 50 to 100 mil...
by Dennis P Brown
Fri Nov 13, 2020 4:13 pm
Forum: Vacuum Technology (& FAQs)
Topic: Bell and whistles diffusion pump based vacuum system.
Replies: 18
Views: 1683

Re: Bell and whistles diffusion pump based vacuum system.

Proffesional wiring work; pictures appear very circa 1950's! Especially that type of wiring in your earlier color pic of a panel. The black and white pic's really adds to that sense. Today seems like through back Friday on posts.
by Dennis P Brown
Fri Nov 13, 2020 4:04 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Grounding - neutral wire or grounding pin
Replies: 7
Views: 1043

Re: Grounding - neutral wire or grounding pin

Agree with Rich - with lethal systems - following code is always the first and absoultly best choice. Other methods may or may not be valid. His last point in his list is vital and would be of great concern if one does use a water pipe (of course, as I mentioned, the metal pipe used MUST be filled w...
by Dennis P Brown
Fri Nov 13, 2020 4:01 pm
Forum: Images du Jour
Topic: Signal recovery/analysis system
Replies: 4
Views: 729

Re: Signal recovery/analysis system

Very professional system (circa 1970's) especially with that analog plotter - love it. Takes me back to my lab days. Having all systems/controls/readouts in one location is very useful for fusor control I've found. But triming the power, vacuum and gas inlet is tricky for an operating fusor if there...
by Dennis P Brown
Thu Nov 12, 2020 3:04 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Quantum world views - It's what make fusion happen
Replies: 11
Views: 3671

Re: Quantum world views - It's what make fusion happen

Your most welcome. And you are correct: the weak force is related to the electrostatic - at high energies, those two forces become one and the same. At lower energies, they differ as does water vapor does to water - same thing (electrostatic) but diferent phase (range of action.) So while the weak f...
by Dennis P Brown
Thu Nov 12, 2020 1:43 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Quantum world views - It's what make fusion happen
Replies: 11
Views: 3671

Re: Quantum world views - It's what make fusion happen

An interesting issue for neutrons (free) is decay time. Apparently there is a possible differnce depending on the method used . This may just be an error or might mean new physics.

Can read more at: https://www.energy.gov/science/articles ... n-lifetime
by Dennis P Brown
Thu Nov 12, 2020 1:20 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Grounding - neutral wire or grounding pin
Replies: 7
Views: 1043

Re: Grounding - neutral wire or grounding pin

I have a well and ground to the metal pipe near the pump; this connects me to the water table - of course, one needs a well. This method can still be done for a municipal water system. Just add a section of copper pipe to your water pipe (pressurized side) in the house. This shouldn't be a very diff...
by Dennis P Brown
Wed Nov 11, 2020 6:42 pm
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Neutron generator graphite moderation
Replies: 2
Views: 785

Re: Neutron generator graphite moderation

Again, impressive work. However, a fusor would provide vastly more neutrons. Still, I'm sure it was a fun learning experience and if it was the 1950's, no doubt others would try it, too ;) .
by Dennis P Brown
Mon Nov 09, 2020 12:37 pm
Forum: Interesting Links
Topic: One big battery
Replies: 7
Views: 937

Re: One big battery

As for pump and hydro - that is about location, location, location and most places that just does not exist. As for battery storage, I agree - a possibly toxic mess waiting (not anywhere as bad as uranium fission, of course.) Which brings me to another though related topic. A Nasa engineer has desig...
by Dennis P Brown
Mon Nov 09, 2020 12:19 pm
Forum: Fusor and/or General Fusion Theory (& FAQs)
Topic: Quantum world views - It's what make fusion happen
Replies: 11
Views: 3671

Re: Quantum world views - It's what make fusion happen

My daugther did special work on the 'lattice' models related to quarks in the nucleus. I can tell you, that isn't physics or mathematics for anyone who isn't very advanced in those subjects - field theroy knowledge is essential. That said, the liquid drop is 1940's but still very useful for certain ...