I have added a picture of the first plasma achieved. sorry for poor quality. 800V about 20mA mystory preasure, air atmosphere.
Oliver
here are some pics of my fusor. despite some setbacks i have managed to come up with something reasonable.
The first pic shows (from the top down) the HV feed through, the top of the chamber, the main chamber with 3 CF flanges and 2 other random flanges. To the left of the main chamber there is a valve on top of which the RGA will sit. To the right is a multi-way feed through (mainly just to seal the port at the moment). The flange covered in foil will be the viewport. Under the main chamber there is a baffle then the turbo pump. There are assorted capacitance manometers in the bottom of the pic. The entire UHV assembly features about 50 years worth of flange standards and non-standards
The second pic shown a close up of the atmosphere side of the HV feed through. It was made out of a butterfly valve and a salvaged feed through. To suppress corona and arcing at higher voltages, the hole feed through and cable connection will be immersed in oil. There is already a handy o-ring grove to seal an oil containing cup against.
The 3rd pic is a closeup of the vacuum side of the feed through. Welded with my homemade TIG
if onley the welds on the main chamber had turned out that neat.the 4th pic of of my rather lame foreline/backing pump, a single stage edwards. I worry i will have to purchase superior pump at great expense
all of this was scavenged with the exception of the capacitance guages which (which need repair) and the RGA, at a combined total of £35 ish from ebay:)
i will be making the viewport tomorrow and hopefully doing some vacuum tests before next week
Oliver
