Difference between revisions of "Meeting 2021 10 27"

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(Created page with "<span style="font-size:larger">'''GMn GEM commissioning Meetings: WEDNESDAY 10:00am - 11:00am'''</span> Link to all previous meetings: [https://hallaweb.jlab.org/wiki/index.p...")
 
(Update on BB GEMs(Sean, Ezekiel, Holly, Anu))
 
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Link to all previous meetings: [https://hallaweb.jlab.org/wiki/index.php/GMn_GEM_Commissioning_Meeting GMn GEM Commissioning Meeting]
 
Link to all previous meetings: [https://hallaweb.jlab.org/wiki/index.php/GMn_GEM_Commissioning_Meeting GMn GEM Commissioning Meeting]
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Please use sbs_gems mailing list for plots/communications and HALOG entries relevant to GEMs!
 
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===  Update on BB GEMs(Sean, Ezekiel, Holly) ===
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===  Update on BB GEMs(Sean, Ezekiel, Holly, Anu) ===
  
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* [https://hallaweb.jlab.org/wiki/images/c/c4/BB_GEMs_10_27_21.pdf GEM Alignmnet] - Sean
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* UV replacement layer is in INFN test lab on nitrogen. HV has been tested. Unclear when we will install (depends on Jessie for support). Resistor replaced [[Media:Resistor_replaced.png | photo]]
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* Current BB/SBS experiment status: [https://logbooks.jlab.org/entry/3932961 https://logbooks.jlab.org/entry/3932961]
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* Resistor changed out on UV layer 0 [https://logbooks.jlab.org/entry/3930452 https://logbooks.jlab.org/entry/3930452]
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* 10uA on deuterium in last SBS kinematics (highest currents/occupancies so far): [https://logbooks.jlab.org/entry/3931870 https://logbooks.jlab.org/entry/3931870]
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* BB GEMs currently back on nitrogen while Hall A work is ongoing [https://logbooks.jlab.org/entry/3932943 https://logbooks.jlab.org/entry/3932943]
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* GEM HV supplies disconnected yesterday for Hall A work [https://logbooks.jlab.org/entry/3932945 https://logbooks.jlab.org/entry/3932945]
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* BB GEM gas switches ok now. Still plan to calibrate the mixing unit in the future with Jack, but probably lower priority than the Hall A issues.
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* INFN trip limits [https://logbooks.jlab.org/entry/3931889 https://logbooks.jlab.org/entry/3931889]
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* Currents and set voltages in the EPICS archiver as of Monday [https://logbooks.jlab.org/entry/3932174 https://logbooks.jlab.org/entry/3932174]. This was always reported as a snapshot in the HALOG with the BB EPICS start of run entries.
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* Replay plots post to logbook automagically. Example here: [https://logbooks.jlab.org/entry/3932008 https://logbooks.jlab.org/entry/3932008]
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* MPD 23 (INFN J2 bottom APV backplane) misbehaves with beam and crashes CODA after some number of events. Consistent problem since beam. Not a problem with cosmics.
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* J0 commmon mode drifts sometimes and seems correlated with the LV cable not being held securely (vertically) in connector. Weight of cable over time pulls it down some.
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* GEM Current Study with beam at SBS-1 and SBS-4 configurations- [https://hallaweb.jlab.org/wiki/images/7/71/1_Pass_Config_with_LH2.pdf SBS-1 LH2] [https://hallaweb.jlab.org/wiki/images/3/34/2_Pass_Config_with_LH2.pdf SBS-4 LH2] [https://hallaweb.jlab.org/wiki/images/4/4d/2_Pass_SBS-4_Config_with_LD2.pdf SBS-4 LD2]
  
 
=== Update on UVa GEM layers for GEn-RP (Anu, John, Thir) ===
 
=== Update on UVa GEM layers for GEn-RP (Anu, John, Thir) ===
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=== Update on INFN GEM layers for GEn-RP (Ezekiel) ===
 
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=== Update on the Tracking efficiency / resolution (Andrew) ===
 
=== Update on the Tracking efficiency / resolution (Andrew) ===
 
 
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=== Update on the High rate DAQ development (Ben, Bryan, Alex, Holly) ===
 
=== Update on the High rate DAQ development (Ben, Bryan, Alex, Holly) ===
 
 
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Latest revision as of 10:30, 27 October 2021

GMn GEM commissioning Meetings: WEDNESDAY 10:00am - 11:00am

Link to all previous meetings: GMn GEM Commissioning Meeting

Please use sbs_gems mailing list for plots/communications and HALOG entries relevant to GEMs!


Update on BB GEMs(Sean, Ezekiel, Holly, Anu)

Update on UVa GEM layers for GEn-RP (Anu, John, Thir)

Update on INFN GEM layers for GEn-RP (Ezekiel)

Update on the Tracking efficiency / resolution (Andrew)

Update on the High rate DAQ development (Ben, Bryan, Alex, Holly)