Difference between revisions of "JEF meeting, September 25, 2020"
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* COMCAL tests, TAC running, etc. | * COMCAL tests, TAC running, etc. | ||
* Simulations | * Simulations | ||
| + | |||
| + | =Minutes= | ||
| + | Attendees: Liping,Igal,Jared,Tim W.,Zisis,Phil,Tim B.,Jane,Sasha,Josh,Azizah,S.T. | ||
| + | * Jane visited Shanghai company and inspected 70 out of 175 new crystals as of her report on Friday | ||
| + | ** Transmission looked okay, except the company reported values at 650 nA instead of 620 nA | ||
| + | *** Want to ask company to give measurements consistent with previous ones | ||
| + | *** Need to do cross calibration of transmittance measurements | ||
| + | ** Some crystals had chips, some issues with quality control with chamfers, but generally better than previous batch | ||
| + | ** Found 3 discolored crystals: 1 yellow, 1 brown, 1 purple -- Sasha pointed out that the discoloration is our major concern | ||
| + | *** Don't have company send us these? | ||
| + | * 50 more steel shields have been delivered, need to be annealed. | ||
| + | * Waiting for light guide company to demonstrate polishing improvement, then order 150 | ||
| + | * Sasha installed last batch of crystals in PS setup before the run ended | ||
| + | ** No big surprises (light output generally okay, except for 2 outliers) | ||
| + | ** Want to do transmittance measurements for 2 bad ones, need access to Carl Zorn's lab, no word yet | ||
| + | ** Plan to modify setup to make it easier to swap out a set of 12 crystals | ||
| + | * Sasha installed 3 modified dividers in COMCAL, but 2 needed to be modified at the last minute and did not work | ||
| + | ** Will do more tests on the bench | ||
| + | * Enough hardware is available to build 20 more modules | ||
| + | ** Need to finalize brazing procedure | ||
| + | ** Work on inventory and coming up with a plan to proceed the week of 9/28/20 | ||
| + | * Work is proceeding on JEF picture archive | ||
Latest revision as of 07:58, 28 September 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.
- 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
- SICCAS crystals
- Preparation for module fabrication
- COMCAL tests, TAC running, etc.
- Simulations
Minutes
Attendees: Liping,Igal,Jared,Tim W.,Zisis,Phil,Tim B.,Jane,Sasha,Josh,Azizah,S.T.
- Jane visited Shanghai company and inspected 70 out of 175 new crystals as of her report on Friday
- Transmission looked okay, except the company reported values at 650 nA instead of 620 nA
- Want to ask company to give measurements consistent with previous ones
- Need to do cross calibration of transmittance measurements
- Some crystals had chips, some issues with quality control with chamfers, but generally better than previous batch
- Found 3 discolored crystals: 1 yellow, 1 brown, 1 purple -- Sasha pointed out that the discoloration is our major concern
- Don't have company send us these?
- Transmission looked okay, except the company reported values at 650 nA instead of 620 nA
- 50 more steel shields have been delivered, need to be annealed.
- Waiting for light guide company to demonstrate polishing improvement, then order 150
- Sasha installed last batch of crystals in PS setup before the run ended
- No big surprises (light output generally okay, except for 2 outliers)
- Want to do transmittance measurements for 2 bad ones, need access to Carl Zorn's lab, no word yet
- Plan to modify setup to make it easier to swap out a set of 12 crystals
- Sasha installed 3 modified dividers in COMCAL, but 2 needed to be modified at the last minute and did not work
- Will do more tests on the bench
- Enough hardware is available to build 20 more modules
- Need to finalize brazing procedure
- Work on inventory and coming up with a plan to proceed the week of 9/28/20
- Work is proceeding on JEF picture archive
