Difference between revisions of "F2/XEM Mar 2, 2018 9:00am"

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(Minutes)
 
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Wait for Mark to look at the SHMS optics.
 
Wait for Mark to look at the SHMS optics.
  
*Simona: HMS Cer calibration. [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/92] Still see inefficiency at delta < -6  and bump around 1.5. PMT1 (top) covers negative delta, npe drops at dp < -6 to around 1 (probably the ones below FADC threshold).
+
*Simona: HMS Cer calibration. [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/92] Hard to see single pe peak from scope trace.
We could just put a analysis cut or change (lower) FADC threshold. If we do change the threshold: check data and log run# when change was made.
+
Inefficiency at delta < -6  and bump around 1.5. Could be hardware issue (shifted mirror?).  
  
 +
PMT1 (top) covers negative delta. npe drops to around 1 at dp < -6. Perhaps FADC threshold cut into the single pe peak.
 +
We could just put a analysis cut or change (lower) FADC threshold. If we do change the threshold: check data and log run# when change was made.
  
 
*F2/XEM git repository: forked from hallc_replay [https://github.com/hallc-f2xem/hallc_replay]
 
*F2/XEM git repository: forked from hallc_replay [https://github.com/hallc-f2xem/hallc_replay]

Latest revision as of 18:57, 2 March 2018

Back to DailyMeeting

Minutes

  • Fernando: Looked into the adc time cuts. [1]

check low momentum run and apply calibration param from the run to higher momentum run. Check pr vs sh correlation for different momenta.

  • Abishek: SHMS DC calibration result was shown. [2]

Post residual too. Send the calibration file to Abel. For HMS, still needs to shift drift time manually for some wires. Check fit quality.

  • Abel: Data vs MC comparison. Applied new calorimeter calibration from Fernando, but didn't see much of difference.

Wait for Mark to look at the SHMS optics.

  • Simona: HMS Cer calibration. [3] Hard to see single pe peak from scope trace.

Inefficiency at delta < -6 and bump around 1.5. Could be hardware issue (shifted mirror?).

PMT1 (top) covers negative delta. npe drops to around 1 at dp < -6. Perhaps FADC threshold cut into the single pe peak. We could just put a analysis cut or change (lower) FADC threshold. If we do change the threshold: check data and log run# when change was made.

  • F2/XEM git repository: forked from hallc_replay [4]
  • Run plan: Polarity change after finishing up 33 deg (probably on Sunday).
  • Special task plan: boiling study and BCM calibration.
  • Dave will discuss with Eric for setting up group disk on ifarm.