Search found 437 matches

by Tyler Christensen
Mon Feb 11, 2013 7:55 pm
Forum: Vacuum Technology (& FAQs)
Topic: cons and pros/ my vacuum system
Replies: 6
Views: 2502

Re: cons and pros/ my vacuum system

<t>I had my fusor running on digital controls for a short time (with the exception of current since I didn't get around to digitizing my HV supply). I gave the program a voltage and it controlled the valves to maintain a pressure that could sustain that voltage at the HV current of user control. <br...
by Tyler Christensen
Mon Feb 11, 2013 7:47 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Worlds smallest Fusor.
Replies: 17
Views: 6308

Re: Worlds smallest Fusor.

<t>Looks nice. What instrument did you use to determine that there is no x-ray leakage at 50kv? Even 1/8" thick stainless usually starts leaking x-rays at 50kv, I find it unlikely that much thinner wall hardware used in 1.33 fittings wouldn't have pretty substantial leakage at that voltage.<br/> <br...
by Tyler Christensen
Tue Feb 05, 2013 2:51 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Silver inner grid
Replies: 12
Views: 3810

Re: Silver inner grid

The conductivity of the grid is irrelevant so long as it is some conductive metal. It's carrying milliamps, so V=IR will show that the drop is negligible compared to the HV potential.
by Tyler Christensen
Tue Feb 05, 2013 1:37 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Silver inner grid
Replies: 12
Views: 3810

Re: Silver inner grid

It has a low melting temperature. Wouldn't be able to sustain anywhere close to the wattage that a Tungsten grid could without melting.
by Tyler Christensen
Sun Jan 27, 2013 8:44 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Double walled vacuum chamber
Replies: 4
Views: 2083

Re: Double walled vacuum chamber

<t>In principle I don't see any issues with this. In practicality, I see quite a few issues:<br/> <br/> <br/> 1. You can't get Aluminum or mild steel flanges of this size or type, so you'd have to custom fabricate them. This would cost a lot or require access to some pretty big machine tools to make...
by Tyler Christensen
Sat Jan 26, 2013 4:38 am
Forum: Fusor Construction & Operation (& FAQs)
Topic: Nupro Shut-off + Metering valve?
Replies: 5
Views: 1995

Re: Nupro Shut-off + Metering valve?

<t>0.019 cv is a bit rough for a fusor, although you might be able to play with it to get just the right setting. It'll be effectively not at all open, and if you even touch it it'll be too far open from there. I have a 10-turn 0.004 cv full scale valve and it's almost as described, with maybe a 20 ...
by Tyler Christensen
Thu Jan 03, 2013 4:43 pm
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Renting time at the nuclear reactor?
Replies: 8
Views: 4125

Re: Renting time at the nuclear reactor?

<t>Depending on what flux you're really requiring, you might have better luck getting it in front of an accelerator than a reactor, especially assuming this is a personal project unaffiliated with a professional lab. In my experience, fission reactors tend to be under multiple layers of intense secu...
by Tyler Christensen
Wed Dec 19, 2012 4:02 pm
Forum: Images du Jour
Topic: Archived - My first (almost) perfect star!
Replies: 14
Views: 5736

Re: My first (almost) perfect star!

<t>Basically, you run into a wall at a given pressure where more voltage requires much more than linearly more current. <br/> <br/> There should be lots of discussions to search for on the forum regarding the relationship of voltage, pressure, and current, which are all related and all affect each o...
by Tyler Christensen
Wed Dec 19, 2012 3:52 pm
Forum: Images du Jour
Topic: Archived - My first (almost) perfect star!
Replies: 14
Views: 5736

Re: My first (almost) perfect star!

<t>More voltage isn't really possible due to the non-linear VI relationships in a plasma device. It'll draw many orders of magnitude more current if you were to turn up the voltage by an order of magnitude (surely more than your chamber or supply could ever support). There isn't really any way to ge...
by Tyler Christensen
Thu Dec 13, 2012 11:32 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Is there a device that chang the frequency of an AC current ?
Replies: 13
Views: 4708

Re: Is there a device that chang the frequency of an AC current ?

You can easily solve DC biasing the core by putting a capacitor in series with the primary. Depending on whether or not you want to build a resonant converter, the capacitor will have different values.