Difference between revisions of "Meeting 2022 02 02"
From Hall A Wiki
(→Discussion on personnel for supporting GEMs in upcoming SBS experiments (all)) |
(→Discussion on personnel for supporting GEMs in upcoming SBS experiments (all)) |
||
| (2 intermediate revisions by one other user not shown) | |||
| Line 10: | Line 10: | ||
*From Hampton, Manju and Saru will getting involved now and primarily focused on GEN-RP GEMs. Thir will also remained involved. | *From Hampton, Manju and Saru will getting involved now and primarily focused on GEN-RP GEMs. Thir will also remained involved. | ||
*Zeke will still be involved during GEN and GEN-RP. | *Zeke will still be involved during GEN and GEN-RP. | ||
| − | *Holly | + | *Holly will be present for all! |
*Currently it seems for near future activities and commissioning of GEN-RP GEMs in the Hall experience folks like Anu, Sean, John, Zeke will be involved to provide teaching and transition for new people from both UVa and Hampton. | *Currently it seems for near future activities and commissioning of GEN-RP GEMs in the Hall experience folks like Anu, Sean, John, Zeke will be involved to provide teaching and transition for new people from both UVa and Hampton. | ||
*New Hampton and UVa people have access to JLab, which is good. | *New Hampton and UVa people have access to JLab, which is good. | ||
*There are discussions of constructing 4 new layers at UVa, so workforce will have to be considered for that as well. | *There are discussions of constructing 4 new layers at UVa, so workforce will have to be considered for that as well. | ||
| − | *Currently it is not clear what will run after | + | *Currently it is not clear what will run after GEn run period. Either SIDIS or GEP. Workforce should be reconsidered as that approaches. |
=== Update on BB GEMs(Sean, Ezekiel, Holly, Anu) === | === Update on BB GEMs(Sean, Ezekiel, Holly, Anu) === | ||
| − | * Analysis of negative pulse study (https://logbooks.jlab.org/entry/3979464) still underway | + | * This morning the BBCal threshold was increased to about 500 mV. Currently the excess currents on LD2 at a beam current of about 4.5-5 uAmp are reasonable and stable. |
| − | * Negative pulse analysis ideas | + | *Anu and Sean recently replaced an entire new backplane and APVs for the 3rd UV layer and this returns that active area so there are no missing APVs. |
| − | ** The occupancy of the negative signals | + | *Currently there are no extra 3 and 4 slot backplanes. So production of more spares needs to be considered |
| − | ** Timing distribution of the negative signals | + | *Analysis of negative pulse study (https://logbooks.jlab.org/entry/3979464) still underway |
| − | ** Fraction of negative signals to positive signals | + | *Negative pulse analysis ideas |
| − | ** Fraction of negative signals to positive signals on the same event | + | **The occupancy of the negative signals |
| − | ** Fraction of negative signals to positive signals on the same event in the same APV | + | **Timing distribution of the negative signals |
| − | ** Fraction of negative signals to positive signals on the same event in the same MPD | + | **Fraction of negative signals to positive signals |
| − | ** Use tracking to see if negative signals correlate to | + | **Fraction of negative signals to positive signals on the same event |
| − | ** Check if hits turned a negative signal into a positive one | + | **Fraction of negative signals to positive signals on the same event in the same APV |
| + | **Fraction of negative signals to positive signals on the same event in the same MPD | ||
| + | **Use tracking to see if negative signals correlate to track position | ||
| + | **Check if the hits turned a negative signal into a positive one | ||
=== Update on UVa GEM layers for GEn-RP (Anu, John, Thir) === | === Update on UVa GEM layers for GEn-RP (Anu, John, Thir) === | ||
Latest revision as of 13:50, 2 February 2022
GMn GEM commissioning Meetings: WEDNESDAY 10:30am - 11:30am
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
Discussion on personnel for supporting GEMs in upcoming SBS experiments (all)
- From UVa, Anu and Sean will still be involved till Fall 2022 or early 2023. John B. will be involved through GEN-RP. 2 new students from Nilanga's group will be getting involved near beginning of the summer.
- From Hampton, Manju and Saru will getting involved now and primarily focused on GEN-RP GEMs. Thir will also remained involved.
- Zeke will still be involved during GEN and GEN-RP.
- Holly will be present for all!
- Currently it seems for near future activities and commissioning of GEN-RP GEMs in the Hall experience folks like Anu, Sean, John, Zeke will be involved to provide teaching and transition for new people from both UVa and Hampton.
- New Hampton and UVa people have access to JLab, which is good.
- There are discussions of constructing 4 new layers at UVa, so workforce will have to be considered for that as well.
- Currently it is not clear what will run after GEn run period. Either SIDIS or GEP. Workforce should be reconsidered as that approaches.
Update on BB GEMs(Sean, Ezekiel, Holly, Anu)
- This morning the BBCal threshold was increased to about 500 mV. Currently the excess currents on LD2 at a beam current of about 4.5-5 uAmp are reasonable and stable.
- Anu and Sean recently replaced an entire new backplane and APVs for the 3rd UV layer and this returns that active area so there are no missing APVs.
- Currently there are no extra 3 and 4 slot backplanes. So production of more spares needs to be considered
- Analysis of negative pulse study (https://logbooks.jlab.org/entry/3979464) still underway
- Negative pulse analysis ideas
- The occupancy of the negative signals
- Timing distribution of the negative signals
- Fraction of negative signals to positive signals
- Fraction of negative signals to positive signals on the same event
- Fraction of negative signals to positive signals on the same event in the same APV
- Fraction of negative signals to positive signals on the same event in the same MPD
- Use tracking to see if negative signals correlate to track position
- Check if the hits turned a negative signal into a positive one
Update on UVa GEM layers for GEn-RP (Anu, John, Thir)
- APV inventory
- Updates on GEn-RP analyzer/replay
