Fusion test run- without fusion.... (weired light effects..)
Posted: Sat Nov 22, 2008 4:43 pm
Oh... waiting for Deuterium...
Today I did a test run at what I guess are fusion like conditions. I cranked up to a voltage of 40kV at a a current of 7mA (300W Halogen Xfmr as primary ballast plus big water resistor on HV side). Vacuum pressure was approx. 3x 10e-3 mbar- then my scintillator went chirping away- I do not know if for xrays or for catching noise but I decided to quit there.
I still did not connect my HC cable directly because I do not want to soak it in oil so far- so I also had a lot of ozone and spray...
Pressure can be regulated really nicely with the needle valve I have but I guess I have quite a big gasflow. The oil insulated feedthrough works great- in fact I think everything works quite good- we ll see if the Neutrons also think so
For monitoring the plasma I used my new Philips SPC620NC web cam- seems to be not too bad because you can even see a very faint glow but seeing grid is red hot is kind of hard.... I had a really nice star but at that point I did not know how to capture images The images I got later have some sort of glow from the ebeams hitting the glass. (btw. I shielded the view port with 3mm lead behind the cam)
I attached pictures of the complete setup and also a crappy one of the glass- glow.
On the setup picture you can see that I wrapped some plastic foil around the feedthrough- just be safe in case of oil leaks. On the left on the green box is one of my scintillator probes. The lead shielding in front of the camera is clearly visible. Left side of picture is my variac, in the background the HV tank. Right side HV monitoring, in the front the needle valve. Under the table: Turbo pump, Fore pump, right side: water heat exchanger for cooling the Turbo. Ah- and the small black thing on the cable in front is a little remote/ safety switch that controls a BIG relays that switches both contacts of the mains for the HV xfmr when you let the switch go- ground always keeps connected! (Kind of "dead man safety")
The whitish stripes on the other picture are from the particles hitting the glass.
Have a nice weekend
Roman
Today I did a test run at what I guess are fusion like conditions. I cranked up to a voltage of 40kV at a a current of 7mA (300W Halogen Xfmr as primary ballast plus big water resistor on HV side). Vacuum pressure was approx. 3x 10e-3 mbar- then my scintillator went chirping away- I do not know if for xrays or for catching noise but I decided to quit there.
I still did not connect my HC cable directly because I do not want to soak it in oil so far- so I also had a lot of ozone and spray...
Pressure can be regulated really nicely with the needle valve I have but I guess I have quite a big gasflow. The oil insulated feedthrough works great- in fact I think everything works quite good- we ll see if the Neutrons also think so
For monitoring the plasma I used my new Philips SPC620NC web cam- seems to be not too bad because you can even see a very faint glow but seeing grid is red hot is kind of hard.... I had a really nice star but at that point I did not know how to capture images The images I got later have some sort of glow from the ebeams hitting the glass. (btw. I shielded the view port with 3mm lead behind the cam)
I attached pictures of the complete setup and also a crappy one of the glass- glow.
On the setup picture you can see that I wrapped some plastic foil around the feedthrough- just be safe in case of oil leaks. On the left on the green box is one of my scintillator probes. The lead shielding in front of the camera is clearly visible. Left side of picture is my variac, in the background the HV tank. Right side HV monitoring, in the front the needle valve. Under the table: Turbo pump, Fore pump, right side: water heat exchanger for cooling the Turbo. Ah- and the small black thing on the cable in front is a little remote/ safety switch that controls a BIG relays that switches both contacts of the mains for the HV xfmr when you let the switch go- ground always keeps connected! (Kind of "dead man safety")
The whitish stripes on the other picture are from the particles hitting the glass.
Have a nice weekend
Roman