Difference between revisions of "Wednesday, March 18, 2020, 2:00 pm EDT"
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* Compton edge decreasing [https://hallaweb.jlab.org/dvcslog/compton/605] | * Compton edge decreasing [https://hallaweb.jlab.org/dvcslog/compton/605] | ||
* Steering vs. spectrum [https://logbooks.jlab.org/entry/3803995] | * Steering vs. spectrum [https://logbooks.jlab.org/entry/3803995] | ||
| − | * Spectrum fitting for collimator offset: Target dependence? Drifting gain + low | + | * Spectrum fitting for collimator offset: Target dependence? Drifting gain + low amplitude backgrounds? |
* LED run | * LED run | ||
| Line 39: | Line 39: | ||
==Minutes== | ==Minutes== | ||
| + | |||
| + | Mark D, Dave G, Adam Z, Kent P, Brian Q, JCC, Cip G, Amali P | ||
| + | |||
| + | # Photon Detector | ||
| + | #* Table scan: Epics logger stopped writing to the CODA file so the scan is very difficult to recover. Should be redone after procedures are made more robust. | ||
| + | #* Planned systematic study of angles of the electron beam will be done ASAP after the Moller today. | ||
| + | #* Possible new additional background from calcium that was not observed earlier. Amali investigating. | ||
| + | #* Tube gain is decreasing but still completely functional. Increasing the voltage to recover the gain might affect the linearity. | ||
| + | #* Pulser trigger doesn't work when there is beam. Need someone to verify the trigger logic in the hall. Opportunistic access. | ||
| + | # Laser | ||
| + | #* Systematic checks wen't well. Other systematic tests are the "second solution" of the same sign or to change the sign. [https://hallaweb.jlab.org/dvcslog/compton/575 elog 575] | ||
| + | # Electron Detector | ||
| + | #* QWADs in EEL126 for channel adjustment. | ||
| + | #* Possible access to reinstate old system. | ||
Latest revision as of 15:08, 18 March 2020
Back to Main Compton Page >> Compton Meetings
*********BLUEJEANS CALL-IN INSTRUCTIONS********* ---------------------------------------------------- 1. Dial Toll-Free Number: 1-888-240-2560 (U.S. & Canada) 2. International participants dial: Toll Number: 1-408-740-7256 3. Enter meeting ID:140287970 Desktop sharing: https://bluejeans.com/140287970
Contents
Agenda
Meeting room = None. Remote only.
General
- Keep taking data!
Electron detector
- QWAD preparation progress
- Analysis updates
Laser
- Laser polarization systematic tests: Preliminary results from HWP=73 and 56 deg. [1], [2]
- Other options for "reasonable" values of RRPD: [3]
Photon Detector
- Compton edge decreasing [4]
- Steering vs. spectrum [5]
- Spectrum fitting for collimator offset: Target dependence? Drifting gain + low amplitude backgrounds?
- LED run
Analysis
- Online analysis results
- Polarization vs. time
Minutes
Mark D, Dave G, Adam Z, Kent P, Brian Q, JCC, Cip G, Amali P
- Photon Detector
- Table scan: Epics logger stopped writing to the CODA file so the scan is very difficult to recover. Should be redone after procedures are made more robust.
- Planned systematic study of angles of the electron beam will be done ASAP after the Moller today.
- Possible new additional background from calcium that was not observed earlier. Amali investigating.
- Tube gain is decreasing but still completely functional. Increasing the voltage to recover the gain might affect the linearity.
- Pulser trigger doesn't work when there is beam. Need someone to verify the trigger logic in the hall. Opportunistic access.
- Laser
- Systematic checks wen't well. Other systematic tests are the "second solution" of the same sign or to change the sign. elog 575
- Electron Detector
- QWADs in EEL126 for channel adjustment.
- Possible access to reinstate old system.
