Difference between revisions of "SoLID Ecal Weekly 20231012"
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| + | ==Information on NPS== | ||
| + | *[https://wiki.jlab.org/cuawiki/index.php/Documents#Calorimeter|NPS Calorimeter page] | ||
| + | *radiation for NPS: a few 100s/10s rad/hour @ (20-30) deg range with magnet off/on; | ||
| + | *typical gain of PMT at operation: 1E3; Preamp: x12 | ||
| + | *In the active base design, [https://www.vsl.cua.edu/cua_phy/images/a/ac/NSS2012_JLAB.pdf|poster by Vladimir Popov], Fig.6 shows gain vs. LED frequency, show up to 2-3 increase in gain for certain rates. | ||
| + | *In [http://www.vsl.cua.edu/cua_phy/images/c/cb/Hamlet.pdf|Hamlet's report] at the 2013 Hall C meeting, slide 12, gain changes at > 50 kHz; base tested during Qweak up to 150 krad | ||
| + | |||
| + | ==Simulation Update== | ||
| + | *Ye now has SoLID vs. Beamtest Edep plots. What about radiation dose? | ||
| + | |||
| + | ==Discussions== | ||
| + | *Xiaochao: Should we start considering active base design? | ||
| + | *JP: LED test is different from beam, need to be cautious about using LED test results | ||
| + | *Paul S.: passive base has its own advantages, should wait for more lessons from NPS | ||
| + | *JP: If we need more tests, need to coordinate with Simona on effort planning | ||
| + | *Zhiwen/Xinzhan: Weizhi looked at 82-deg data GEM rates. Now will look at 18 deg data. | ||
| + | *Xinzhan is testing methods for Fermilab GEM test data | ||
| + | *Xiaochao will email Rakitha about finding readout method for LASPD | ||
==Discussion with SDU+THU groups== | ==Discussion with SDU+THU groups== | ||
| − | (Xiaochao, Zhihong, Cunfeng) | + | (Xiaochao, Zhihong, Cunfeng, 8pm ET) |
* Cunfeng: SDU Ye Tian soldered the resistors on the PMT for the two SDU Shower modules. Zhihong: For the THU module, should have used the base directly from Hamamatsu | * Cunfeng: SDU Ye Tian soldered the resistors on the PMT for the two SDU Shower modules. Zhihong: For the THU module, should have used the base directly from Hamamatsu | ||
*Zhihong: asked to study peak integral vs. integration time window (pileup and gain change will show up differently) | *Zhihong: asked to study peak integral vs. integration time window (pileup and gain change will show up differently) | ||
*Cunfeng: | *Cunfeng: | ||
| − | **Showed test of Chunhui fiber fusion using 1 of the many methods, see slide: [ | + | **Showed test of Chunhui fiber fusion using 1 of the many methods, see slide: [https://solid.jlab.org/wiki/index.php/File:Fiberfuse-testOct12.ppt|Fiberfuse-testOct12.ppt] |
**As can be seen from the slide, the light transfer efficiency is 15% using the method. On slide 8, we have compairson of different fusing method but the highest is only 60%. This is comparable to fiber bundle (basically, the geometrical matching factor between two random circles is already 60%). And so we should go back to our baseline design using Fujikura DDK fiber connectors. | **As can be seen from the slide, the light transfer efficiency is 15% using the method. On slide 8, we have compairson of different fusing method but the highest is only 60%. This is comparable to fiber bundle (basically, the geometrical matching factor between two random circles is already 60%). And so we should go back to our baseline design using Fujikura DDK fiber connectors. | ||
*MCPPMT: Zhihong said he sent one to Alexandre. | *MCPPMT: Zhihong said he sent one to Alexandre. | ||
Latest revision as of 19:53, 23 October 2023
Information on NPS
- Calorimeter page
- radiation for NPS: a few 100s/10s rad/hour @ (20-30) deg range with magnet off/on;
- typical gain of PMT at operation: 1E3; Preamp: x12
- In the active base design, by Vladimir Popov, Fig.6 shows gain vs. LED frequency, show up to 2-3 increase in gain for certain rates.
- In report at the 2013 Hall C meeting, slide 12, gain changes at > 50 kHz; base tested during Qweak up to 150 krad
Simulation Update
- Ye now has SoLID vs. Beamtest Edep plots. What about radiation dose?
Discussions
- Xiaochao: Should we start considering active base design?
- JP: LED test is different from beam, need to be cautious about using LED test results
- Paul S.: passive base has its own advantages, should wait for more lessons from NPS
- JP: If we need more tests, need to coordinate with Simona on effort planning
- Zhiwen/Xinzhan: Weizhi looked at 82-deg data GEM rates. Now will look at 18 deg data.
- Xinzhan is testing methods for Fermilab GEM test data
- Xiaochao will email Rakitha about finding readout method for LASPD
Discussion with SDU+THU groups
(Xiaochao, Zhihong, Cunfeng, 8pm ET)
- Cunfeng: SDU Ye Tian soldered the resistors on the PMT for the two SDU Shower modules. Zhihong: For the THU module, should have used the base directly from Hamamatsu
- Zhihong: asked to study peak integral vs. integration time window (pileup and gain change will show up differently)
- Cunfeng:
- Showed test of Chunhui fiber fusion using 1 of the many methods, see slide: [1]
- As can be seen from the slide, the light transfer efficiency is 15% using the method. On slide 8, we have compairson of different fusing method but the highest is only 60%. This is comparable to fiber bundle (basically, the geometrical matching factor between two random circles is already 60%). And so we should go back to our baseline design using Fujikura DDK fiber connectors.
- MCPPMT: Zhihong said he sent one to Alexandre.
