Fusor Forums

Easier said than done Dennis.

Richard, I'm sorry to hear about the fruits and lack there of, if your efforts. My numbers are bad now, but they started out fairly good. My original numbers were higher on my pnc than they were when I held it against your Fusor IV doing a million per second. I was originally bolstered and remain so...

My neutron numbers have been dropping steadily over the last several runs. Today I took a series of measurements at various voltages from 30 to 40 kV with constant current. After I was done I went back to my starting voltage and repeated the measurement. The difference was huge. At -30 kV, 5 mA, and...

Luke, So far there hasn't been much difference with the installation on Windows 10. I am not done yet but my issues are mostly hardware.

I sit my pnc on top of one of my beam end blanks. At 40 kV and 10 mA I get about 750 cpm. The same BF3 tube measured 400 cpm held against your fusor IV doing a million n/sec. I'm sure my total neutrons are less, but the effective neutron flux I can get close to seems higher. I think Jon R said that ...

I have been putting together an MCA system using Jay's write up as Scott mentioned. So far, I have a Windows 10 laptop now talking to a 556A AIM. I have a little more work to do before I'm getting spectra through the system, but with Jay's write up, I have come way further than I did first trying to...

With my cross, the xrays are where you might imagine, the view port and feedthrough. At higher voltages, the cross tubes become transparent. The conflat fittings have some bulk them so that helps except out the beam target ends. I have now wrapped the cross tubes with a double layer of lead for a to...

Richard, Congrats on the new fusor. One nice thing about using air to glow clean is the ability to start your work at lower voltages without having to use a massive chamber pressure to light the plasma. To get 7 kV to light with d you would be pushing over 50 microns in that cross. I have to go high...

Richard,
Have you thought about shielding? The crosses can really scream at 40 kV. Of course, my viewpoint is the worst, but I had to shield the cross itself.

I'm curious about your choice of copper for the grid. You're not worried about melting it?

Jim K

Richard, you might try annealing the radiation browning. Years ago I had a beer glass that I browned in a big cobalt source. One day, it accidentally was put in the dish washer instead if the usual hand was. The heat dry in the washer eliminated a good bit of the brown. Perhaps your view port could ...