Hi Doug,
Was the calibration of the epics LDCCT variable OK? I was under the
impression that Dan had been calibrating it periodically in hardware, so
it should still be accurate.
--thanks, Chris
Electronic Log Book wrote:
>Operator: hasell
>
>Easy shift - hall open.
>
>Karen, Dan, and I recalibrated the DCCT scaler against a calibrated charge source. See run 15198. Also performed the fit. Results are in ELOG. Interesting thing to note is that the voltage to frequency converter is only good to just over 250 mA so unless we want to make a big change we should stay below 250 mA for data acquisition.
>
>Michael and Karen replaced the laser on the flasher system. So that is working again for runs 15206 and following.
>
>Aki has recalibrated the unpol system so it is now available for both H and D.
>
>Nozzle was regenerated and Genya started ABS again.
>
>Bill and Taylan measured the circular polarisation of the laser just before it entered the ring and found that it is getting worse with time. Mostlikely the reason is dirty optics. Still the effect is small enough that we won't do anything about it.
>
>Other that we took cosmic data.
>
>Started locking up the south hall at 16:30.
>
>Runs 15200-15201 15203-15209 are cosmic
>
>
>
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