Difference between revisions of "BCAL Readout Segmentation Task group Meeting: June 2, 2011"
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*#* ''Done. Latest number from Stamatis' thesis is 9.5%'' | *#* ''Done. Latest number from Stamatis' thesis is 9.5%'' | ||
*#* ''New number has been committed to calib directory in svn'' | *#* ''New number has been committed to calib directory in svn'' | ||
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| + | *# Decide on proper form of energy correction and recalibrate BCAL [http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=1301 GlueX-doc-1301], [http://www.jlab.org/~semenov/plot-recE_90deg_1000mev.pdf Plot] (Andrei) | ||
*#: | *#: | ||
*# Check on status of SiPM cross-talk/after pulse separation (David) | *# Check on status of SiPM cross-talk/after pulse separation (David) | ||
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*# Update calibDB with most recent values for SiPM and BCAL properties (David) | *# Update calibDB with most recent values for SiPM and BCAL properties (David) | ||
*#* ''Done 5/31/2011.'' | *#* ''Done 5/31/2011.'' | ||
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*#: | *#: | ||
*# Write up and distribute document describing how BCAL threshold is calculated based on event size (David) | *# Write up and distribute document describing how BCAL threshold is calculated based on event size (David) | ||
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*# Check widths of energy distributions using low threshold and compare with expected (??) | *# Check widths of energy distributions using low threshold and compare with expected (??) | ||
*: | *: | ||
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=Minutes= | =Minutes= | ||
Revision as of 20:36, 1 June 2011
Meeting Info
Time:
- 11:30 JLab
- 9:30 Regina
Location:
- CC F326-327
Vid-con:
- ESNet 8542553
Agenda
- Review action items from previous meeting
- Confirm Sampling fraction number for BCAL (Zisis)
- Done. Latest number from Stamatis' thesis is 9.5%
- New number has been committed to calib directory in svn
- Decide on proper form of energy correction and recalibrate BCAL GlueX-doc-1301, Plot (Andrei)
- Check on status of SiPM cross-talk/after pulse separation (David)
- Recent value of 15.7% reported for 1μs pulse
- Spoke with Yi. Earlier measurements indicated ~12% for a 200ns gate.
- Estimate for 100ns gate may be closer to 10% according to Yi's guess.
- Investigate addition to pedestal width due to gain variation of SiPMs in an array (David)
- Yi pointed out that this will affect the signal width, not the pedestal width.
- The measured gain variation between tiles is ~4%. Adding this in quadrature increases single PE signal width from 10% to <11%
- Update calibDB with most recent values for SiPM and BCAL properties (David)
- Done 5/31/2011.
- Write up and distribute document describing how BCAL threshold is calculated based on event size (David)
- Check widths of energy distributions using low threshold and compare with expected (??)
- Confirm Sampling fraction number for BCAL (Zisis)
Minutes
Participants
TBD
