Radiation tests of UF/PNPI CMS ME CSC HV system, Distribution board

Oct 2003

All tests were done under full voltage (4KV input, 3800V output on all channels)

Test log:

Run	Dose	Current	Target	Result
1	100 Rad	10 pA	Around channels 1,2,3	OK
2	5 kRad	50 pA	Around channels 1,2,3	OK
3	5 kRad	100 pA	Around channels 5,6,7	OK
4	5 kRad	100 pA	DAC + ADC+ logic around	OK
5	5 kRad	100 pA	Analog Multiplexor, channel 6 and around	OK
6	5 kRad	100 pA	Digital interface	OK
7	5 kRad	100 pA	Test pulse generator	OK
8	5 kRad	100 pA	LV regulators	OK
9	5 kRad	100 pA	Along the board, in the area of LV regulators (covers all channels in lower part of the board and all digital logic in that part)	OK
10	5 kRad	100 pA	Along the board, in the area of LV regulators (covers all channels in lower part of the board and all digital logic in that part)	OK
11	5 kRad	100 pA	Along the board, in the area of LV regulators (covers all channels in lower part of the board and all digital logic in that part)	OK
12	5 kRad	100 pA	Along the board, in the area of channel 1 (covers all channels in upper part of the board and all digital logic in that part)	OK
13	5 kRad	100 pA	Along the board, in the area of channel 1 (covers all channels in upper part of the board and all digital logic in that part)	OK

Conclusions:

1. No permanent damage of any kind detected.

2. Single event upsets are visible at high rates, but since we don’t have any programmable logic, the system recovers immediately (on the next clock). The software will ignore such upsets.

3. All tests were done with the board and components completely powered and parameters were monitored during and after the test.