Talk-Polywell.org

I was thinking of using liquid nitrogen but decided that was too many complications getting in the way of doing the experiment. Without a good filter system I probably couldn't keep the water pure enough. Oil is used in large transformers. I have some used vacuum oil that I can filter the particulat...

peltier junctions don't solve the problem of thermal contact with the coil. The junctions that I have seen are flat surfaced so there would be a much smaller contact area than wrapping the coil with water pipe tubing. I am leaning towards encapsulation with a design that I should be able to build us...

Can you describe the application? Maybe there is a configuration of permanent magnets that can do the job for you, as it is a fairly small volume you're trying to permeate. Maybe as next step. Right now I have wire, iron, hymu transformer core metal, some power supplies, and vacuum systems. I don't...

Just curious-- How much power must this dissipate, and what stagnation temperature must it tolerate ?? Can you co-wind some coolant tubing with the coil ? Could you manage with foil or laminates to transfer heat to the mountings ?? Can you break the windings into sections, and remove heat at their ...

The Texas summer heat has driven me out of the garage so I am spending more time working on design instead of on infrastructure which means that I am at a computer and have time to post messages at least until it cools down. The copper water coils are running out of the vacuum chamber to a chiller. ...

One of my current designs requires standard open center magnet coil cylinders inside the vacuum chamber. About 5 cm long, 1cm dia open center, 1 cm coil thickness. It is a standard solenoid. I was going to remove the heat by wrapping a 3/8 copper water tube around it. This would work well if convect...

You can easily build your own these days. Check out the Alegro A13xx series of hall sensors. I've used them to map fields fairly well. Building another device is a side track that I am trying to avoid. I had looked at Analog Devices AD22151 which is a similar sensor but was going to go that route o...

Cool. How hard a vacuum are they good for? The experiments they were being used in went down to 10-8. I tend to think that other parts of the vacuum system would fail first. Mostly depends on how good the metal seal is. Might take a little bit of experimenting. But at $2.50 for a feed through I am ...

The cheapest certifiable gaussmeter ($380) that I have been able to find is at
http://www.trifield.com/gauss_meter.htm

I had been looking at an auction of several high end gaussmeters (without probes) where the probes themselves are an order of magnitude more expensive than the above.

My main goal for simulation is to be able to watch individual electrons move through various non uniform magnetic and electric fields.

I downloaded the linux version last night, but it looks like it is 1.24.2. Probably not worth dinking with. Do you know what the data format is supposed to look like? Maybe I can generate files in the correct format and other people can get it to work with the viewer. The first link in my post shou...

Excellent, thanks! I've just been looking at ways to build a vacuum chamber with my spare scrap, and figured spark plugs would be perfect for feedthrus. I didn't realize that spark plugs could be used as feedthroughs until I came across a reference to the practice in "Vacuum Equipment and Technique...

Spark plugs are supposed to be good for 30 to 35KV. Their nominal rating is around 15KV with the spark gap in place so that makes sense. You might also want to get a plug that is available in resistive/nonresistive styles as many of the fusor folks are using a ballast resistor of around 400K ohms. ...

Long time no see! Sounds like you're seriously building something! I haven't had anything to report. The current test set-up is the simplest possible thing I could think of for investigating extending electron entrapment time. However it still requires a lot of stuff some of which I haven't figured...

I just spent some time tracking down the smallest cheapest spark plug that I could find for a vacuum chamber feed through. The smallest cheapest one I could find is a Denso U20M-U sold by www.sparkplugs.com. 10mm dia at the threads. The cost was $2.24 each with shipping and handling of $10. I bought...