User name nerses
Log entry time 21:03:23 on March 9,2006
Entry number 166012
This entry is a followup to: 166004
keyword=DC leakage current for Carbon and He3 targetsI have checked 2 runs with carbon target.
Run DC1 DC2 DC3 Current Target
2812-2813 4 4 4 5 He3
2816-2817 9 7 4 2 Carbon Foils
It seems that rates on 1st chamber increased from 4MHz (He-3 target) to 9MHz and for 2nd chamber from 4 to 7MHz. And because leakage current is bigger, effeciency is droped and amplifier module structures could be seen on the hitmap plots.
Bogdan said that production will be done with 10 mkA, so we should
prepare for operation at level of 8-9 MHz in every DC.
There is need ASAP to have table of set voltage levels for HV source.
FIGURE 1
FIGURE 2
