Friday, November 25, 2005
We closed the Prometheus chamber and filled oil on Wednesday, the oil became stable after one day. So I ran the system this morning, unfortunately the x-ray cathode pulse could not be synchronized with x-ray anode pulse. Keith and Bill suggested I should check the cathode thyratron CX1585, I replaced the thyratron and found the situation became wrose. I had to put the thyratron back. The picture shows the bottom of the Thyratron CX1585 in the x-ray cathode trigger box.This wave forms show (1) the x-ray anode signal without cathode pulse, the railgap were trigger randomly, I don't know what caused the x-ray cathode noise; (2) the cathode pulse without anode signal, the negtive cathode pulse looked well; (3) anode and cathode trigger pulses were applied to the x-ray gun, the cathode signal became worse, the noise followed the anode pulse, and the cathode pulse peak could not move forward to match the anode peak.