Difference between revisions of "Meeting 2021 10 27"
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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! | ||
---- | ---- | ||
| − | === Update on BB GEMs(Sean, Ezekiel, Holly) === | + | === Update on BB GEMs(Sean, Ezekiel, Holly, Anu) === |
* [https://hallaweb.jlab.org/wiki/images/c/c4/BB_GEMs_10_27_21.pdf GEM Alignmnet] - Sean | * [https://hallaweb.jlab.org/wiki/images/c/c4/BB_GEMs_10_27_21.pdf GEM Alignmnet] - Sean | ||
| + | * 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]] | ||
| + | * Current BB/SBS experiment status: [https://logbooks.jlab.org/entry/3932961 https://logbooks.jlab.org/entry/3932961] | ||
| + | * Resistor changed out on UV layer 0 [https://logbooks.jlab.org/entry/3930452 https://logbooks.jlab.org/entry/3930452] | ||
| + | * 10uA on deuterium in last SBS kinematics (highest currents/occupancies so far): [https://logbooks.jlab.org/entry/3931870 https://logbooks.jlab.org/entry/3931870] | ||
| + | * BB GEMs currently back on nitrogen while Hall A work is ongoing [https://logbooks.jlab.org/entry/3932943 https://logbooks.jlab.org/entry/3932943] | ||
| + | * GEM HV supplies disconnected yesterday for Hall A work [https://logbooks.jlab.org/entry/3932945 https://logbooks.jlab.org/entry/3932945] | ||
| + | * 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. | ||
| + | * INFN trip limits [https://logbooks.jlab.org/entry/3931889 https://logbooks.jlab.org/entry/3931889] | ||
| + | * 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. | ||
| + | * Replay plots post to logbook automagically. Example here: [https://logbooks.jlab.org/entry/3932008 https://logbooks.jlab.org/entry/3932008] | ||
| + | * 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. | ||
| + | * 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. | ||
| + | * 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) === | ||
| + | * | ||
| − | + | === Update on INFN GEM layers for GEn-RP (Ezekiel) === | |
* | * | ||
=== Update on the Tracking efficiency / resolution (Andrew) === | === Update on the Tracking efficiency / resolution (Andrew) === | ||
| − | |||
* | * | ||
=== 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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* | * | ||
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| − | |||
Latest revision as of 11:30, 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!
Contents
Update on BB GEMs(Sean, Ezekiel, Holly, Anu)
- GEM Alignmnet - Sean
- 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 photo
- Current BB/SBS experiment status: https://logbooks.jlab.org/entry/3932961
- Resistor changed out on UV layer 0 https://logbooks.jlab.org/entry/3930452
- 10uA on deuterium in last SBS kinematics (highest currents/occupancies so far): https://logbooks.jlab.org/entry/3931870
- BB GEMs currently back on nitrogen while Hall A work is ongoing https://logbooks.jlab.org/entry/3932943
- GEM HV supplies disconnected yesterday for Hall A work https://logbooks.jlab.org/entry/3932945
- 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.
- INFN trip limits https://logbooks.jlab.org/entry/3931889
- Currents and set voltages in the EPICS archiver as of Monday https://logbooks.jlab.org/entry/3932174. This was always reported as a snapshot in the HALOG with the BB EPICS start of run entries.
- Replay plots post to logbook automagically. Example here: https://logbooks.jlab.org/entry/3932008
- 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.
- 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.
- GEM Current Study with beam at SBS-1 and SBS-4 configurations- SBS-1 LH2 SBS-4 LH2 SBS-4 LD2
