Difference between revisions of "JEF meeting, September 3, 2021"
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* Module fabrication | * Module fabrication | ||
* COMCAL tests, TAC running, etc. | * COMCAL tests, TAC running, etc. | ||
− | + | :: -[https://logbooks.jlab.org/entry/3898882 Testing CCAL] -- Sasha | |
* Data analysis | * Data analysis | ||
#[https://halldweb.jlab.org/DocDB/0052/005239/004/glue-jefxd-igal-jaegle-03092021.pdf \eta \to \gamma\gamma\pi^0] | #[https://halldweb.jlab.org/DocDB/0052/005239/004/glue-jefxd-igal-jaegle-03092021.pdf \eta \to \gamma\gamma\pi^0] | ||
* Simulations | * Simulations | ||
+ | |||
+ | =Minutes= | ||
+ | Attendees: Igal,Varun,Phil,Jane,Liping,Sasha,Arshak,Jon,Zisis,Bill,Olga,Susan,Tim B.,S.T. | ||
+ | * No news from SICCAS: still waiting for results of test crystals with new powder | ||
+ | * Module fabrication (on hold for now, but components are available) | ||
+ | ** Received brass flanges | ||
+ | ** Received samples of 50 micron thick brass straps, doing stress tests: strength double old 25 micron thick strips | ||
+ | * Sasha put CCAL in trigger, tested using LED | ||
+ | * CCAL dividers draw higher current than before: head dissipation in principle could be issue, but chiller seems to handle this well enough (could be tuned) | ||
+ | * Igal gave an update on his continuing π0γγ signal+background analysis | ||
+ | ** Need to suppress large peaking background due to η→2γ | ||
+ | *** If due to conversions, suggestion was that perhaps TOF veto might help? | ||
+ | ** Working with Chase to use BDT in TMVA package to try to separate signal from background | ||
+ | ** Double π0 cut (+/-6σ removes 50% of signal) | ||
+ | *** Working on simulation using amptools | ||
+ | ** Cross section estimate 25% lower than Jon's | ||
+ | *** Estimate 50% of Laget prediction | ||
+ | *** If holds, ~3x higher flux required to get 50M tagged η's in 100 days |
Latest revision as of 10:55, 9 September 2021
Meeting time and location= 9:30 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.
- Make sure you have created a BlueJeans account via your JLab CUE account using this link:
- http://jlab.bluejeans.com (You should only need to do this once)
- If connecting via Web Browser: click this link (no passcode is needed):
- If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
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- or, List of International Numbers
- If connecting via Polycom unit:
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- Enter meeting ID above
Agenda
- SICCAS crystals
- Module fabrication
- COMCAL tests, TAC running, etc.
- -Testing CCAL -- Sasha
- Data analysis
- Simulations
Minutes
Attendees: Igal,Varun,Phil,Jane,Liping,Sasha,Arshak,Jon,Zisis,Bill,Olga,Susan,Tim B.,S.T.
- No news from SICCAS: still waiting for results of test crystals with new powder
- Module fabrication (on hold for now, but components are available)
- Received brass flanges
- Received samples of 50 micron thick brass straps, doing stress tests: strength double old 25 micron thick strips
- Sasha put CCAL in trigger, tested using LED
- CCAL dividers draw higher current than before: head dissipation in principle could be issue, but chiller seems to handle this well enough (could be tuned)
- Igal gave an update on his continuing π0γγ signal+background analysis
- Need to suppress large peaking background due to η→2γ
- If due to conversions, suggestion was that perhaps TOF veto might help?
- Working with Chase to use BDT in TMVA package to try to separate signal from background
- Double π0 cut (+/-6σ removes 50% of signal)
- Working on simulation using amptools
- Cross section estimate 25% lower than Jon's
- Estimate 50% of Laget prediction
- If holds, ~3x higher flux required to get 50M tagged η's in 100 days
- Need to suppress large peaking background due to η→2γ