Difference between revisions of "JEF meeting, May 3, 2024"
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*9:30 am EST (JLab time) remote only | *9:30 am EST (JLab time) remote only | ||
* [https://halldweb.jlab.org/wiki-private/index.php/JEF_Weekly_Meeting#Connection_information Connection information] | * [https://halldweb.jlab.org/wiki-private/index.php/JEF_Weekly_Meeting#Connection_information Connection information] | ||
− | |||
*'''Preparation of parts for ECAL''' -- Sasha | *'''Preparation of parts for ECAL''' -- Sasha | ||
+ | ** - signal cables - done | ||
+ | ** - signal patch panel [https://halldweb.jlab.org/detectors/fcal2/installation/meetings/10_13_2023/signal_patch_panel.jpg ] - done | ||
+ | ** - HV short cables: received, checked, labeled (last week) | ||
+ | ** - HV long cable, 18 ready (out of 36) | ||
+ | ** - HV distribution boards: in preparation | ||
+ | ** - LV cables: waiting for about 160 cables (will need to test, label, and bundle) | ||
+ | ** - LV distribution boards [https://halldweb.jlab.org/detectors/fcal2/cables/lv_distribution/lv_dist_board.jpg ]. Have to populate with connectors, and design a box around the PCB | ||
+ | ** - Chris S. is working on the prototype of the LED board. Currently 5 blue LEDs, consider to add red LEDs as well | ||
* '''Ongoing projects''' | * '''Ongoing projects''' | ||
+ | ** - Bundling short cables (groups of 7, 7, and 6 cables): signal (done), HV (done), LV (36 layers done, waiting for cables) [https://halldweb.jlab.org/detectors/fcal2/installation/meetings/04_26_2024] | ||
+ | ** - [https://halldweb.jlab.org/detectors/fcal2/installation/meetings/05_03_2024/[[]] Update from Laveen] | ||
+ | * '''[[Testing of PMT dividers]]''' -- Sasha / Vlad / George / Mindy | ||
+ | ** - Testing procedure [https://halldweb.jlab.org/detectors/fcal2/dividers/divider_test_guide.pptx] | ||
+ | ** - Mindy has finished with preparing all sockets (~1650) ! | ||
+ | ** - All dividers have been fabricated and tested by George [https://halldweb.jlab.org/wiki/index.php/Final_test_of_dividers] | ||
+ | *** decided to remove regulators on about 40 dividers | ||
+ | ** - Adding ECAL and updating FCAL translation table in the TT.DB (have to finish during this week) | ||
* '''Installation of the FCAL2 detector & integration to GlueX''' -- Sasha / Vlad / Hakob / Laveen | * '''Installation of the FCAL2 detector & integration to GlueX''' -- Sasha / Vlad / Hakob / Laveen | ||
+ | ** <span style="color: red"> Installation of the LMS has been completed </span> [https://logbooks.jlab.org/entry/4282307] | ||
+ | ** Installation and testing cables and dividers [https://logbooks.jlab.org/entry/4293662][https://logbooks.jlab.org/entry/4295312] | ||
+ | ** All crates are connected to the network switch Ethernet switch [https://logbooks.jlab.org/entry/4295336] | ||
+ | ** Preparing for testing installed dividers | ||
+ | ** [https://halldweb.jlab.org/wiki/index.php/FCAL_Installation Detector installation page] | ||
+ | *** (links from the previous meetings [https://logbooks.jlab.org/book/halld][https://halldweb.jlab.org/detectors/fcal2/installation/photos/install_fcal/students_detector1.jpg][https://halldweb.jlab.org/detectors/fcal2/installation/photos/install_fcal/students_detector.jpg]) | ||
+ | ** '''Preparation for beam tests with the PS''' | ||
+ | *** measure shower beam profile | ||
+ | *** shower reconstruction between PbWO4 and LG | ||
** '''Other hardware projects''' | ** '''Other hardware projects''' | ||
+ | *** --prototype of the ECAL veto counter | ||
+ | *** --study shower profile using PS (also transition region between lead tungstate and LG modules (?) ) | ||
+ | *'''FCAL2 poster for open house?''' | ||
+ | ** JEF/ECAL/FCAL poster | ||
*'''Analysis/Simulation''' | *'''Analysis/Simulation''' | ||
** [https://halldweb.jlab.org/wiki/images/9/93/Glue-jefxd-igal-jaegle-03052024.pdf eta to ggpi0's update] -- ig | ** [https://halldweb.jlab.org/wiki/images/9/93/Glue-jefxd-igal-jaegle-03052024.pdf eta to ggpi0's update] -- ig | ||
+ | |||
+ | =Minutes= | ||
+ | Attendees: Igal, Liping, Olga, Laveen, Bill, Sasha, Vlad, Stjepan, Zisis, Jane, Jon, S.T. | ||
+ | * Laveen reported that 50 more LV cables have been labelled and tested, still need 110 | ||
+ | ** 6 layers of PMT dividers have been installed and tested | ||
+ | *** Dark room made dark using tedlar and plates | ||
+ | *** Bypassed amplifier | ||
+ | *** Set 1kV HV (close to nominal voltage; expect ~920V when have amplifier installed) | ||
+ | **** Issue with CAEN HV interlock needs to be resolved | ||
+ | *** Use LMS with 7V on LEDs to provide light input, look at signals on oscilloscope | ||
+ | *** Found a few problems: swapped signal cables; one HV cable not able to hold HV, needed to be swapped out | ||
+ | ** Ethernet cables for 7 crates have been installed, connected all crates to switch | ||
+ | * PMT dividers all fabricated and tested | ||
+ | ** Plan to increase number with regulator removed | ||
+ | ** Plan to install and test one layer of PMTs at a time; can do one layer every 1-2 days | ||
+ | ** Need HV control to be implemented in CSS | ||
+ | * Chiller installation underway, need final plumbing, would like to be operational for full testing of insert (okay for now for short-duration testing) | ||
+ | * Igal gave an update on η→π0γγ | ||
+ | ** Went over GAMS results | ||
+ | *** Highest measured BR for η→π0γγ | ||
+ | *** Saw η'→ωγ, ω→π+π-π0 but ω→π0γ not shown | ||
+ | *** Strict cuts to isolate signal | ||
+ | ** Went over A2 results | ||
+ | *** Background due to 2π0 | ||
+ | *** Suppress η→3π0 background with shower effective radius cut | ||
+ | ** η' possible good reference channel | ||
+ | ** Discussed contributions to η→2γ peaking background (shower splitting + conversions (which we can suppress using TOF veto)) | ||
+ | ** Introduce PINN (physics-informed neutal network) | ||
+ | ** Looked at spring 2017 data -- no obvious signal seen |
Latest revision as of 14:08, 6 May 2024
Meeting time and location:
- 9:30 am EST (JLab time) remote only
- Connection information
- Preparation of parts for ECAL -- Sasha
- - signal cables - done
- - signal patch panel [1] - done
- - HV short cables: received, checked, labeled (last week)
- - HV long cable, 18 ready (out of 36)
- - HV distribution boards: in preparation
- - LV cables: waiting for about 160 cables (will need to test, label, and bundle)
- - LV distribution boards [2]. Have to populate with connectors, and design a box around the PCB
- - Chris S. is working on the prototype of the LED board. Currently 5 blue LEDs, consider to add red LEDs as well
- Ongoing projects
- Testing of PMT dividers -- Sasha / Vlad / George / Mindy
- Installation of the FCAL2 detector & integration to GlueX -- Sasha / Vlad / Hakob / Laveen
- Installation of the LMS has been completed [6]
- Installation and testing cables and dividers [7][8]
- All crates are connected to the network switch Ethernet switch [9]
- Preparing for testing installed dividers
- Detector installation page
- Preparation for beam tests with the PS
- measure shower beam profile
- shower reconstruction between PbWO4 and LG
- Other hardware projects
- --prototype of the ECAL veto counter
- --study shower profile using PS (also transition region between lead tungstate and LG modules (?) )
- FCAL2 poster for open house?
- JEF/ECAL/FCAL poster
- Analysis/Simulation
- eta to ggpi0's update -- ig
Minutes
Attendees: Igal, Liping, Olga, Laveen, Bill, Sasha, Vlad, Stjepan, Zisis, Jane, Jon, S.T.
- Laveen reported that 50 more LV cables have been labelled and tested, still need 110
- 6 layers of PMT dividers have been installed and tested
- Dark room made dark using tedlar and plates
- Bypassed amplifier
- Set 1kV HV (close to nominal voltage; expect ~920V when have amplifier installed)
- Issue with CAEN HV interlock needs to be resolved
- Use LMS with 7V on LEDs to provide light input, look at signals on oscilloscope
- Found a few problems: swapped signal cables; one HV cable not able to hold HV, needed to be swapped out
- Ethernet cables for 7 crates have been installed, connected all crates to switch
- 6 layers of PMT dividers have been installed and tested
- PMT dividers all fabricated and tested
- Plan to increase number with regulator removed
- Plan to install and test one layer of PMTs at a time; can do one layer every 1-2 days
- Need HV control to be implemented in CSS
- Chiller installation underway, need final plumbing, would like to be operational for full testing of insert (okay for now for short-duration testing)
- Igal gave an update on η→π0γγ
- Went over GAMS results
- Highest measured BR for η→π0γγ
- Saw η'→ωγ, ω→π+π-π0 but ω→π0γ not shown
- Strict cuts to isolate signal
- Went over A2 results
- Background due to 2π0
- Suppress η→3π0 background with shower effective radius cut
- η' possible good reference channel
- Discussed contributions to η→2γ peaking background (shower splitting + conversions (which we can suppress using TOF veto))
- Introduce PINN (physics-informed neutal network)
- Looked at spring 2017 data -- no obvious signal seen
- Went over GAMS results