Fusor Forums

Thanks for all the compliments! There is a fan blowing directly onto the chamber which helps by a few degrees, but it's far from enough. It cools stuff down between runs more than anything. I've started thinking about water cooling as well, perhaps some 1/8" copper or aluminum tubing around the arms...

And some plasma pictures:

I've been working steadily on my fusor for the past several months and have a few noteworthy updates to share. DAQ / Control System I made a new control box that has hardwired connections for voltage, current, and MFC deuterium flow. The signals are passed through 100ft of 15-core, stranded, shielde...

I've made some modifications on the vacuum side of the feedthrough to eliminate arcing. The ceramic disc on the original version, intended to shield the quartz from the plasma, quickly sputtered over with graphite and became conductive. It arced across the surface and to the chamber wall, restrictin...

I can still vouch for the glass feedthrough design. I've tested it up to 60kV both with and without plasma, and my only limitation is x-ray shielding and corona on my ballast resistor. Never had any arcs or breakdowns. There have been some modifications on the plasma end, but these I'll describe in ...

As I mentioned in the original post, the metal component is a standard 2.75" conflat to 0.75" or 1" quick-disconnect adapter. An o-ring seals the outside of the alumina or glass tube to the fitting and is compressed with the nut on the fitting. These are all Ebay finds or from other surplus websites...

Ion/electron beams did this to my viewport:


I'd hate to see that happen to a bell jar under vacuum.

We just get many one-timers who do no more than add to the membership count. Not trying to scare you off and certainly keep the enthusiasm. Welcome to the forums!

"Construction / Technical Do not post simple questions here . Use the New User Chat area" is the header of this section of the forums. You haven't written an introductory post in the appropriate section and need to correct this. All your questions have been answered numerous times in the forums and ...

Thanks for the compliments. Hopefully the design will get someone out of a rut. I absolutely agree that motivation is the key here. My journey from this (late 2013, early 2014): 2014-01-24.jpg to achieving fusion (summer 2019) was quite a rocky experience. Failures included: - Noise pickup by the ne...