Difference between revisions of "JEF meeting, December 2, 2022"
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* '''Module fabrication''' -- Sasha | * '''Module fabrication''' -- Sasha | ||
** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/fcal_fabrication.pdf Status of fabrication ] | ** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/fcal_fabrication.pdf Status of fabrication ] | ||
− | ** Fabricated modules: <span style="color:#FF0000"> Total | + | ** Fabricated modules: <span style="color:#FF0000"> Total 1362 </span> (14 modules fabricated since last week) |
*** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication.pdf All SICCAS 576 SICCAS] | *** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication.pdf All SICCAS 576 SICCAS] | ||
*** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication_crytur.pdf 767 CRYTUR], available: 10 | *** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/module_fabrication_crytur.pdf 767 CRYTUR], available: 10 | ||
*** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/11_11_22 Moving modules to the new lab (EEL108)] | *** [https://halldweb.jlab.org/detectors/fcal2/module_fabrication/status/11_11_22 Moving modules to the new lab (EEL108)] | ||
− | + | * '''[[Testing of PMT dividers]]''' -- Sasha / Arshak | |
* '''Installation of the FCAL2 detector''' -- Sasha / Arshak | * '''Installation of the FCAL2 detector''' -- Sasha / Arshak | ||
** [https://halldweb.jlab.org/wiki/index.php/FCAL_Installation Detector installation page] | ** [https://halldweb.jlab.org/wiki/index.php/FCAL_Installation Detector installation page] | ||
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* '''Light Monitoring System''' -- Arshak | * '''Light Monitoring System''' -- Arshak | ||
* '''Simulations/Analysis''' | * '''Simulations/Analysis''' | ||
+ | |||
+ | =Minutes= | ||
+ | Attendees: Bill, Arshak, Igal, Phil, Susan, Sasha, Olga, Jon, Liping, Zisis, Eugene, Azizah, Jane, Axel, Malte, S.T. | ||
+ | * Have 28 new crystals on hand | ||
+ | ** Expect 25 more from physics division by end of year | ||
+ | ** Expect another batch from Crytur in May of next year | ||
+ | ** Will need to disassemble COMCAL next year | ||
+ | * Mindy from Detector Support Group continues wrapping crystals and has started working on soldering wires to PMT sockets | ||
+ | * Parts for module assembly in good shape | ||
+ | * Grand total number of assembled modules = 1362 | ||
+ | * Sasha working on testing PMT dividers to provide feedback to Fernando | ||
+ | ** Looked at signals on scope using laser source: intrinsic timing = 2.5 ns rise time w/o amplifier, but signal shape does not change much with amplifier | ||
+ | *** With amplifier some pulse deformation for high pulse heights | ||
+ | *** Need to test rate dependence | ||
+ | *** Test impact of switching noise due to nearby Cockroft-Walton bases from FCAL1? | ||
+ | *** Try to learn from NPS experience (larger amplification, see large amount of oscillations/noise but have small signals) | ||
+ | **** Copper shielding? | ||
+ | ** Also working on finalizing contract with GWU for this work | ||
+ | ** Recall that divider design has a 3x amplifier that can be bypassed -- expect only to implement amplifier for inner crystals in the insert | ||
+ | *** How to set? Want to keep current draw to a reasonable level | ||
+ | ** Instrument COMCAL with new dividers? | ||
+ | ** When to start mass production? Deadline: this year for Fernando to put order in | ||
+ | *** Sasha to ask Chris S. to order subset of 25 dividers to instrument 5x5 array | ||
+ | * Plan for cabling the insert well underway | ||
+ | ** Some details about number/position of patch panels need to be worked out | ||
+ | ** Make a mock-up? | ||
+ | * Planning for FCAL refurbishment | ||
+ | ** Sasha ordered cookies for FCAL | ||
+ | ** 200 Pre-cut mylar sheets available at IU | ||
+ | * Light monitoring system: Arshak started checking cross talk on scope using a 3x3 array, injecting light in the center | ||
+ | ** Found very low level of leakage (~0.025%) | ||
+ | ** Plan to test in beam conditions using PS test stand | ||
+ | *Students: Zisis mentioned that dates for ResFac need be finalized by February |
Latest revision as of 09:20, 5 December 2022
Meeting time and location:
- 9:30 am EST (JLab time) remote only
- Zoom meeting ID: 161 050 9142 Passcode: 004965
Agenda
- Preparation of parts for FCAL2 modules -- Sasha
- Received 20 + 8 CRYTUR crystals during this week [1]
- Expect to receive 25 more CRYTUR crystals from physics division by the end of this year
- Wrapped CRYTUR crystals: 786
- Available for wrapping: 14 crystals were wrapped during last week
- Mindy (DSG group) continues wrapping crystals
- Mindy will start soldering wires to sockets (short meeting with Chris and Mindy)
- List of available parts
- Received 20 + 8 CRYTUR crystals during this week [1]
- Module fabrication -- Sasha
- Status of fabrication
- Fabricated modules: Total 1362 (14 modules fabricated since last week)
- Testing of PMT dividers -- Sasha / Arshak
- Installation of the FCAL2 detector -- Sasha / Arshak
- Detector installation page
- Updates from the meetings with Tim's group [2]
- Detector cabling and patch panels for the FCAL insert
- Manpower and division of tasks
- Projects for summer students
- Light Monitoring System -- Arshak
- Simulations/Analysis
Minutes
Attendees: Bill, Arshak, Igal, Phil, Susan, Sasha, Olga, Jon, Liping, Zisis, Eugene, Azizah, Jane, Axel, Malte, S.T.
- Have 28 new crystals on hand
- Expect 25 more from physics division by end of year
- Expect another batch from Crytur in May of next year
- Will need to disassemble COMCAL next year
- Mindy from Detector Support Group continues wrapping crystals and has started working on soldering wires to PMT sockets
- Parts for module assembly in good shape
- Grand total number of assembled modules = 1362
- Sasha working on testing PMT dividers to provide feedback to Fernando
- Looked at signals on scope using laser source: intrinsic timing = 2.5 ns rise time w/o amplifier, but signal shape does not change much with amplifier
- With amplifier some pulse deformation for high pulse heights
- Need to test rate dependence
- Test impact of switching noise due to nearby Cockroft-Walton bases from FCAL1?
- Try to learn from NPS experience (larger amplification, see large amount of oscillations/noise but have small signals)
- Copper shielding?
- Also working on finalizing contract with GWU for this work
- Recall that divider design has a 3x amplifier that can be bypassed -- expect only to implement amplifier for inner crystals in the insert
- How to set? Want to keep current draw to a reasonable level
- Instrument COMCAL with new dividers?
- When to start mass production? Deadline: this year for Fernando to put order in
- Sasha to ask Chris S. to order subset of 25 dividers to instrument 5x5 array
- Looked at signals on scope using laser source: intrinsic timing = 2.5 ns rise time w/o amplifier, but signal shape does not change much with amplifier
- Plan for cabling the insert well underway
- Some details about number/position of patch panels need to be worked out
- Make a mock-up?
- Planning for FCAL refurbishment
- Sasha ordered cookies for FCAL
- 200 Pre-cut mylar sheets available at IU
- Light monitoring system: Arshak started checking cross talk on scope using a 3x3 array, injecting light in the center
- Found very low level of leakage (~0.025%)
- Plan to test in beam conditions using PS test stand
- Students: Zisis mentioned that dates for ResFac need be finalized by February