Fusor Forums

I'm not convinced it's your counter. 2 to 4 mA at 25 to 30 kV is not necessarily a lot of fusion in a small cross fusor. My cross fusor started popping neutrons out at around 8 to 10 mA and above 30. The results were variable too with one day neutrons and next none. Have you tried different gas flow...

Andrew Seltzman comes to mind for me. His work included innovative grid cooling and ion sources. He also has long history of contribution to the forum.

Nice work Mark! When I read that you used big blocks of parafin, I was reminded of a historic treasure I recently visited in Munich. At the Deutsches Museum, they exhibit Otto Hahn's lab desk complete with version of Meitner's experiment that first measured fission, complete with a big block of wax....

Thanks Frank. I figured he was looking at either proton recoil or xrays/gammas because I dont see a moderator.

Ian, trace it out from his chamber to the vacuum valve. Looks like a turbo to me.

I'm interested in what he's trying to detect with the pmt.

Jim K

When I was breaking in my fusor, I gradually over successive runs would raise my voltage in steps with current relatively steady. I rode the Paschen curve by a combination of throttling closed the d injection and/or cracking my vacuum valve open a little more. I experienced good control on multiple ...

Jon, I wouldn't be surprised if it was, but I don't know if the titanium I used was an alloy or not. I bought a small sheet of it at a past HEAS. I think from T.R. Leary.

I'm away from my lab for a while now to check, but I think the sheet had some numbers and/or letters etched on it.



Jim K

I'm not bought into titanium grids. I think they liberate gas too much for my liking.

I had some time this evening to tinker with my DP5 board. I put a dab of solder between the pads at R28. I connected it by usb to my Windows 10 laptop which auto detected and loaded the correct drivers. I installed the DppMCA software which connected to the DP5 without issue. When I get more time, I...

There is no doubt that CCDs and CMOS show interaction events for gamma and higher energy xrays. Some of the interactions cause pixel sparkle and sometimes permanent damage. In my years of work at a nuke plant I've seen plenty of toasted cameras, mostly ccd, toasted by gammas. My readings are far fro...