Difference between revisions of "JEF meeting, April 10, 2020"
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* Status of the crystal production (SICCAS) | * Status of the crystal production (SICCAS) | ||
* [https://halldweb.jlab.org/wiki/index.php/Module_Design Preparation for module fabrication] | * [https://halldweb.jlab.org/wiki/index.php/Module_Design Preparation for module fabrication] | ||
− | * COMCAL tests, TAC running, etc. | + | * [https://logbooks.jlab.org/book/hdfcal2 COMCAL tests, TAC running, etc.] -- Sasha |
* Preparations for PAC meeting (jeopardy) | * Preparations for PAC meeting (jeopardy) | ||
**[https://halldweb.jlab.org/DocDB/0044/004420/001/JEF-update.pdf] JEF update presentation (Liping) | **[https://halldweb.jlab.org/DocDB/0044/004420/001/JEF-update.pdf] JEF update presentation (Liping) | ||
+ | |||
+ | =Minutes= | ||
+ | Attendees: Arshak,Varun,Sasha,Zisis,Liping,Igal,Tim B.,Jon Z., Phil, Susan, Jane, S.T. | ||
+ | * Two shipments of SICCAS crystals have arrived at the lab | ||
+ | ** We've been asked to sign the invoice, but would prefer to inspect the crystals first | ||
+ | ** Sasha estimates need 2 weeks to check out crystals when lab reopens (no idea yet when this will happen) | ||
+ | * Progress has been made on new contract Shanghai ceramic institute | ||
+ | ** Crystal price reduced | ||
+ | ** Money for Wuhan for QA | ||
+ | * Received all PMTS (first set of 500) | ||
+ | ** Need to check dimensions of last 150, can trade with Hall C collaborators if too large in diameter | ||
+ | * Status of other outstanding items (brass pieces, light guides) not completely clear | ||
+ | * Sasha linked logbook entries for CCAL from Spring 2020 run | ||
+ | ** Replaced 28 bases in CCAL near the beam line with versions with 3x and 6x amplification | ||
+ | *** Modified bases: better linearity | ||
+ | ** Installed into beam, took data with GlueX during last couple of days of run | ||
+ | *** Also did some running with CCAL in trigger | ||
+ | *** Did not contribute significantly to dead time | ||
+ | ** Monitoring LED produces too weak signals, need to increase light intensity | ||
+ | ** For next PrimEx run, need to redo electronics for COMCAL with new bases during summer: potential work for students. | ||
+ | * Summer work: Liping will have 2 students, Phil will have 1: emphasized need to get paperwork started even if date of lab reopening is not clear | ||
+ | ** Phil's institution has instituted travel restrictions that would require special dispensation to overcome | ||
+ | ** Eugene agreed to provide some monetary compensation for students | ||
+ | * PAC jeopardy | ||
+ | ** Lab management + JLab board of directors negotiating date of PAC (could be delayed by a month or two) and when jeopardy for Hall D will be considered (could be delayed by 6 months or a year) -- no word from management yet (comment by Su: not a negotiation, JLUO board communicated input from the halls.) | ||
+ | ** It looks like we will be ready to go even if the PAC is not delayed. It's not clear we need to do any additional simulations, but a sensitivity study for the dark scalar is probably warranted. | ||
+ | ** Sasha brought up the idea that we should consider a backup plan if GlueX phase II might not pass the jeopardy process. Right now the JEF project is tied to GlueX w/DIRC. GlueX has another 200 days approved w/o DIRC; it's not clear that this is necessarily separate from GlueX w/DIRC as far as the management is concerned. | ||
+ | ** If we do end up running JEF by itself, Igal mentioned considering possibility of running with Pb target | ||
+ | * Liping gave an update summarizing the JEF project | ||
+ | ** Highlighted additional channels that we could study, including channels with lepton pairs | ||
+ | ** Sasha: due to reduce S/B would need to run slightly longer than the 100 days we assumed for the first proposal to get the same B-boson reach, etc. -- if could run for large fraction of 200 days for GlueX w/o DIRC, would be ideal | ||
+ | ** Susan provided clarifications regarding eta statistics for WASA-at-COSY (comment by Su:) | ||
+ | *** reaction p+d->3He eta, 10e7 etas (reaction suitable for analysis decay eta->pi0gg) | ||
+ | *** reaction p+p->pp eta, 5*10e8 etas (main trigger on 'charged decays') |
Latest revision as of 03:52, 11 April 2020
Meeting time and location= 9:00 am EST (JLab time) Bluejeans only
Connection instructions
We are using BlueJeans Video/Audio conferencing. Our meeting ID number is 992533564. Click "Expand" for more details.
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Agenda
- Status of the crystal production (SICCAS)
- Preparation for module fabrication
- COMCAL tests, TAC running, etc. -- Sasha
- Preparations for PAC meeting (jeopardy)
- [1] JEF update presentation (Liping)
Minutes
Attendees: Arshak,Varun,Sasha,Zisis,Liping,Igal,Tim B.,Jon Z., Phil, Susan, Jane, S.T.
- Two shipments of SICCAS crystals have arrived at the lab
- We've been asked to sign the invoice, but would prefer to inspect the crystals first
- Sasha estimates need 2 weeks to check out crystals when lab reopens (no idea yet when this will happen)
- Progress has been made on new contract Shanghai ceramic institute
- Crystal price reduced
- Money for Wuhan for QA
- Received all PMTS (first set of 500)
- Need to check dimensions of last 150, can trade with Hall C collaborators if too large in diameter
- Status of other outstanding items (brass pieces, light guides) not completely clear
- Sasha linked logbook entries for CCAL from Spring 2020 run
- Replaced 28 bases in CCAL near the beam line with versions with 3x and 6x amplification
- Modified bases: better linearity
- Installed into beam, took data with GlueX during last couple of days of run
- Also did some running with CCAL in trigger
- Did not contribute significantly to dead time
- Monitoring LED produces too weak signals, need to increase light intensity
- For next PrimEx run, need to redo electronics for COMCAL with new bases during summer: potential work for students.
- Replaced 28 bases in CCAL near the beam line with versions with 3x and 6x amplification
- Summer work: Liping will have 2 students, Phil will have 1: emphasized need to get paperwork started even if date of lab reopening is not clear
- Phil's institution has instituted travel restrictions that would require special dispensation to overcome
- Eugene agreed to provide some monetary compensation for students
- PAC jeopardy
- Lab management + JLab board of directors negotiating date of PAC (could be delayed by a month or two) and when jeopardy for Hall D will be considered (could be delayed by 6 months or a year) -- no word from management yet (comment by Su: not a negotiation, JLUO board communicated input from the halls.)
- It looks like we will be ready to go even if the PAC is not delayed. It's not clear we need to do any additional simulations, but a sensitivity study for the dark scalar is probably warranted.
- Sasha brought up the idea that we should consider a backup plan if GlueX phase II might not pass the jeopardy process. Right now the JEF project is tied to GlueX w/DIRC. GlueX has another 200 days approved w/o DIRC; it's not clear that this is necessarily separate from GlueX w/DIRC as far as the management is concerned.
- If we do end up running JEF by itself, Igal mentioned considering possibility of running with Pb target
- Liping gave an update summarizing the JEF project
- Highlighted additional channels that we could study, including channels with lepton pairs
- Sasha: due to reduce S/B would need to run slightly longer than the 100 days we assumed for the first proposal to get the same B-boson reach, etc. -- if could run for large fraction of 200 days for GlueX w/o DIRC, would be ideal
- Susan provided clarifications regarding eta statistics for WASA-at-COSY (comment by Su:)
- reaction p+d->3He eta, 10e7 etas (reaction suitable for analysis decay eta->pi0gg)
- reaction p+p->pp eta, 5*10e8 etas (main trigger on 'charged decays')