Difference between revisions of "JEF meeting, November 22, 2019"
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(Created page with "Meeting time and location= 10:00 am EST (JLab time) F226 =Connection instructions= <div class="toccolours mw-collapsible mw-collapsed"> We are using [https://cc.jlab.org/blu...") |
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*SICCAS crystals | *SICCAS crystals | ||
*Preparations for upcoming run | *Preparations for upcoming run | ||
+ | |||
+ | =Minutes= | ||
+ | Attendees: Arshak, Vlad B., Liping, Josh C., Jane, S.T., Sasha, Zisis | ||
+ | * Wuhan contract: Eugene got response from contract department, no problems seen, will proceed with info provided by Jane. | ||
+ | * CRYTUR crystals are in Vlad's lab, look good. | ||
+ | * SICCAS crystals are more or less on schedule -- expect some in December? Company will tell Jane when they are ready for visual inspection. | ||
+ | ** Mentioned some unspecified "difficulty", doesn't seem to be a showstopper. | ||
+ | * Buy more (~30) CRYTUR crystals for region closest to beam line? (price differential $1.8k vs $1k (SICCAS) needs to be considered). | ||
+ | * Rolf still on board with buying SICCAS crystals up to a total of 1600 (500 already on order). | ||
+ | ** Keep adding to existing order? Feedback needed first? | ||
+ | *PMTs: received 50 first article tubes out of 500, but have wrong socket type! | ||
+ | ** Will accept, can adapt with some machining of parts | ||
+ | ** Need to sort according to diameter (2 are too big, need to reject; 8 more tight fit into shielding) | ||
+ | *** Considering cooperating with NPS to get smaller diameter tubes will giving them the ones that are too big. | ||
+ | *** Test collar planned | ||
+ | ** Plan to test ~20% of the tubes | ||
+ | ** Nex 50 PMTs should arrive soon, should have right sockets. | ||
+ | * Plan to duplicate Vlad's light yield setup | ||
+ | ** Set up in EEL 126? | ||
+ | ** Dark box components on order | ||
+ | ** Some parts need to be 3D printed | ||
+ | ** Trigger scintillator needs to be tested | ||
+ | ** Electronics stand needed (VXS crate, PC, HV, etc.) -- goal = January? | ||
+ | *** Fernando has ordered crates. | ||
+ | * Clean room for module assembly -- space identified in TEDF, space cleaned out in December | ||
+ | * Light transmission setup: Carl Zorn's lab in ARC upgrading from Windows 7 to Windows 10. | ||
+ | *Finalization of module design | ||
+ | ** Light guides are chopped and polished, ready to go. | ||
+ | ** Will use DIRC cookie idea, ready for testing. | ||
+ | ** Ready for force analysis -- can use "banged-up" crystals for this purpose | ||
+ | *** Need to address question of whether 25 micron thick straps are good enough | ||
+ | *** No corrosion seen with latest brazing compound/technique | ||
+ | *** Need 4 new brazing heads, need temp controls. | ||
+ | *** Keep several assembled modules on shelf for some time to check stability over time. | ||
+ | ** Soft iron for magnetic shield has been annealed. | ||
+ | ** ESR (reflective material) thickness is currently 65 microns, looking into finding thinner material. | ||
+ | ** Goal for "final" design by mid January. | ||
+ | * Test setup on PS arm | ||
+ | ** Platform ready Dec 4? | ||
+ | ** Still need plate for 12 module assembly | ||
+ | ** Use some junk crystals to test assembly? | ||
+ | * Base redesign (Vlad P.) | ||
+ | ** 3 new bases installed in COMCAL | ||
+ | *** 2 with amplification change, 1 with low pass filter added | ||
+ | *** Measure linearity | ||
+ | *** Final desing by summer 2020? | ||
+ | * Discussed idea to replace bases for LG in FCAL. |
Latest revision as of 09:21, 25 November 2019
Meeting time and location= 10:00 am EST (JLab time) F226
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 "##"
- Dial: 1 888 240 2560 (US or Canada only)
- or, List of International Numbers
- If connecting via Polycom unit:
- Dial 199.48.152.152 or bjn.vc
- Enter meeting ID above
Agenda
- CRYTUR crystals
- SICCAS crystals
- Preparations for upcoming run
Minutes
Attendees: Arshak, Vlad B., Liping, Josh C., Jane, S.T., Sasha, Zisis
- Wuhan contract: Eugene got response from contract department, no problems seen, will proceed with info provided by Jane.
- CRYTUR crystals are in Vlad's lab, look good.
- SICCAS crystals are more or less on schedule -- expect some in December? Company will tell Jane when they are ready for visual inspection.
- Mentioned some unspecified "difficulty", doesn't seem to be a showstopper.
- Buy more (~30) CRYTUR crystals for region closest to beam line? (price differential $1.8k vs $1k (SICCAS) needs to be considered).
- Rolf still on board with buying SICCAS crystals up to a total of 1600 (500 already on order).
- Keep adding to existing order? Feedback needed first?
- PMTs: received 50 first article tubes out of 500, but have wrong socket type!
- Will accept, can adapt with some machining of parts
- Need to sort according to diameter (2 are too big, need to reject; 8 more tight fit into shielding)
- Considering cooperating with NPS to get smaller diameter tubes will giving them the ones that are too big.
- Test collar planned
- Plan to test ~20% of the tubes
- Nex 50 PMTs should arrive soon, should have right sockets.
- Plan to duplicate Vlad's light yield setup
- Set up in EEL 126?
- Dark box components on order
- Some parts need to be 3D printed
- Trigger scintillator needs to be tested
- Electronics stand needed (VXS crate, PC, HV, etc.) -- goal = January?
- Fernando has ordered crates.
- Clean room for module assembly -- space identified in TEDF, space cleaned out in December
- Light transmission setup: Carl Zorn's lab in ARC upgrading from Windows 7 to Windows 10.
- Finalization of module design
- Light guides are chopped and polished, ready to go.
- Will use DIRC cookie idea, ready for testing.
- Ready for force analysis -- can use "banged-up" crystals for this purpose
- Need to address question of whether 25 micron thick straps are good enough
- No corrosion seen with latest brazing compound/technique
- Need 4 new brazing heads, need temp controls.
- Keep several assembled modules on shelf for some time to check stability over time.
- Soft iron for magnetic shield has been annealed.
- ESR (reflective material) thickness is currently 65 microns, looking into finding thinner material.
- Goal for "final" design by mid January.
- Test setup on PS arm
- Platform ready Dec 4?
- Still need plate for 12 module assembly
- Use some junk crystals to test assembly?
- Base redesign (Vlad P.)
- 3 new bases installed in COMCAL
- 2 with amplification change, 1 with low pass filter added
- Measure linearity
- Final desing by summer 2020?
- 3 new bases installed in COMCAL
- Discussed idea to replace bases for LG in FCAL.