Page History

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5.15pm
Placed FEB L1t on cold plate next to the SVT box and connected P1 power cable. Without detector attached the FEB powers up fine with expected currents. When connecting the L1t detectors we see again a 3A current on DIG as before. We also tried connecting L1-3 spare half-modules with the same result. We then swapped out P1 with P5 and powered the FEB as if it was L1b. This was successful. Thus the problem points to some problem in the L1t power cable. Tomorrow we need to ohm out that path to see if we can find a problem.

6:30 p.m.
L1t, L6t and L6b modules have been tested with the single-FEB setup. All OK.

Equipment

Interlock board

see Group C interlock board for instructions on monitoring and controls.

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