RC Meeting and Runplan, Wednesday, Sept 27
From HallCWiki
- Status
- Established reasonable spot size yesterday afternoon. https://logbooks.jlab.org/entry/3598149 , https://logbooks.jlab.org/entry/3598152
- Got good carbon hole. Need to move beam by 3mm in vertical. https://logbooks.jlab.org/entry/3598210
- Check HMS/SHMS and ELREAL in trigger.
- Setup the detector time windows
- HMS Cerenkov looks good. https://logbooks.jlab.org/entry/3598357
- SHMS Aerogel calibrated https://logbooks.jlab.org/entry/3598334
- Dave Meekins put in new encoder positions. https://logbooks.jlab.org/entry/3598541 . Rebooted target IOC. Check C-hole. New positions x = -1mm, y=0mm
- Ion chamber calibration completed for LH2. Already done for 6% C.
- Went to ep elastics at Q2 = 10 to get see coincidence trigger on scope. Could not see with initial kinmatics.
- Did PID check out of the HMS at two different central momentum.
- Around 3am when changing to setup for the optics studies, problems with HMS Q1 and Q3.
- Decided to do the BPM/HARP calibration, unfortunately RC forgot to turn off the raster.
- Around 6am access to work on HMS Q1 and Q3.
- Q1 now working https://logbooks.jlab.org/entry/3599058
- Q3 working with plateau at 475A so cannot cycle as high as desired https://logbooks.jlab.org/entry/3599073
- Plans
- Optics studies with the HMS and SHMS. Need 65uA. Pushing MCC to give 65uA since needed for experiment.
- Started around 11pm. Need about 4.5 hours at 70 uA.
- next Lumi scan or LH2 elastics?
- Optics studies with the HMS and SHMS. Need 65uA. Pushing MCC to give 65uA since needed for experiment.