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User name paschke
Log entry time 21:08:07 on September13,2009
Entry number 289407
keyword=helicity pulled from Counting House. Only in injector now!
Unplugged many helicity signals. Most I could identify. The only two helicity signals still connected in the counting house go to the Compton polarimeter and the Moller polarimeter. I'm considering unplugging the moller polarimeter as well, and leaving that for a simple reconfiguration step before running the moller measurements.
A summary:
- helicity had been used for the synch monitor. This is now using MPS.
- helicity had been patched down to the RIGHT arm under the label "QRT". Weird... maybe that was mistracked.
- helicity had been going somewhere on the left on a patch labeled "IPC time 2".
- helicity had been plugged to the counting house scaler. that was removed.
- I moved the purple/tan ECL twisted pair cable, which had been putting helicity into the parity counting house crate's flexio board. I left it alone in the flexio board, but moved it to the pairsynch module. IF helicity is required in the counting house again, this is quite easy: simply move the purple cable (now labeled) with the same polarity back to the helicity distribution module.
Now helicity is only going to the Hall A Compton and Moller. This was done during run #12282. Run #12283 should have a stable helicity distribution scheme.