Difference between revisions of "Feb 7, 2012 Readout"
From GlueXWiki
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##* Prepare executive summary in the next few days so that Eugene can talk to Volker | ##* Prepare executive summary in the next few days so that Eugene can talk to Volker | ||
##* DRAFT Proposal will follow later this week for feedback | ##* DRAFT Proposal will follow later this week for feedback | ||
+ | # Update from Athens | ||
+ | ## Submitted designs for all boards and submitted to JLab | ||
+ | ##* Fernando will review and provide feedback | ||
+ | ## Started to build first article | ||
+ | ##* Boards should be received next week and can be populated | ||
+ | ##* If possible the boards will be tested in Hall B with mini-Bcal | ||
# Update from USM | # Update from USM | ||
## [https://halldweb1.jlab.org/wiki/images/4/41/RunManager_report_5.pdf Run manager report] | ## [https://halldweb1.jlab.org/wiki/images/4/41/RunManager_report_5.pdf Run manager report] | ||
+ | ##* Testing has started in Stage 2 after some faulty starts and minor repairs of setup | ||
+ | ##* So far measured six JLab SiPMs and more from Hamamatsu | ||
+ | ##* Stage 3 refurbished to start testing | ||
+ | ##* Amps with low gain replaced | ||
+ | ##* Presently testing more JLab MPPCs | ||
+ | ##* Added thermal pad (1 mm 2000S40) for half the sensors to check systematics | ||
## [https://halldweb1.jlab.org/wiki/images/c/c2/Station2.pdf Station 2 analysis (Sergey)] | ## [https://halldweb1.jlab.org/wiki/images/c/c2/Station2.pdf Station 2 analysis (Sergey)] | ||
+ | ##* Revision of all data | ||
+ | ##* Updated conversion factors based on photodiode data and spectral response | ||
+ | ##* USM results compare favorably with Musienko data from CMS | ||
+ | ##* Comparison of PDE, gain, DR and cross talk compares well with JLab data, although some systematic differences remain. | ||
+ | ##* All parameters measured at Vbr+0.9 V. [Yi: JLab used the Hamamatsu proposed operating voltage, which was measured to be about Vbr+0.95V]. | ||
+ | ##* JLab gain about 5.5x10^5, USM gives about 5.0x10^5. | ||
+ | ##* JLab PDE about 20%, USM gives about 24% | ||
+ | ##* Sergey: Uniformity of PDE over the MPPC is very good | ||
+ | ##* Yi: Compared the two methods of extracting PDE: N0 in ped vs full fit. Differences due to method is less than 1%. | ||
## [https://halldweb1.jlab.org/wiki/images/8/84/02_07_my_pres_Hall-D.pdf Station 3 analysis (Hayk)] | ## [https://halldweb1.jlab.org/wiki/images/8/84/02_07_my_pres_Hall-D.pdf Station 3 analysis (Hayk)] | ||
+ | ##* New data shown. Data taken with <Npe>~2.5 compared to 1.5 for previous data. | ||
+ | ##* Still need to remeasure some amplifiers | ||
+ | ##* Fitting routine takes about 30 min/MPPC. Fast algorithm is about 6 times faster, but fitting will be used. | ||
+ | ## Based on today's presentation, Elton will send message to the listserver approving production testing at USM. Full approval of Stage 1 and 2. Conditional approval of Stage 3 based on USM verifying proper thermal contacts of MPPCs to cooling plate. | ||
## [http://atlasusr.fis.utfsm.cl:8000/ USM Web Interface to DB] | ## [http://atlasusr.fis.utfsm.cl:8000/ USM Web Interface to DB] | ||
# Status of Testing at JLab | # Status of Testing at JLab | ||
## [https://halldweb1.jlab.org/elog-halld/SiPM/ Hall-D ELOG] | ## [https://halldweb1.jlab.org/elog-halld/SiPM/ Hall-D ELOG] | ||
− | ### [https://halldweb1.jlab.org/elog-halld/SiPM/24 Spectra with Chiller ON] | + | ##* Preliminary data is now being taken. Chiller set to 10 deg C. |
− | + | ##* Two preamp boards populated (8 channels) | |
+ | ##* Problem with DC offset out of original board. | ||
+ | ##* Revised board replaced resistor with a capacitor to eliminate baseline. Data shown are for the board with the capacitor. | ||
+ | ##* Data shown for 200 ns gate. Signal to noise decreases as gate is increased. | ||
+ | ## [https://halldweb1.jlab.org/elog-halld/SiPM/24 Spectra with Chiller ON] | ||
+ | ## [https://halldweb1.jlab.org/elog-halld/SiPM/26 Some photos] | ||
# Other | # Other |
Revision as of 16:37, 7 February 2012
Teleconference Time: 11:00 a.m. EST
- ESNET (Number is 8542553) and EVO session (GlueX Calorimetry meeting room)
- Phone connection only upon request.
- +1-866-740-1260 : US and Canada
- +1-303-248-0285 : International
- then use participant code: 3421244# (the # is needed when using the phone)
- OR from www.readytalk.com type access code 3421244 into "join a meeting" without the # (you need java plugin)
Contents
Participant Direct Lines
- JLab Phone: in CC F326 is 757-269-6337 (usual room)
- JLab Phone in CC L207 is 757-269-7084
- Phone in the Regina Videoconference Suite is 306-585-4204
- Athens Phone: in Christina's office is 011-30-210-727-6947
Items for followup from previous meeting
-
Jlab (Yi) and USM (Hayk) will make available raw spectra for fitting by other groups to check consistency.- Yi forwarded fits of USM data from Dec 5 to Zisis
- See e-mail Jan 30
Presentations from recent meetings
Tentative Agenda
- Announcements
- Review of Action Items
- Calorimetry Talks at the Collaboration Meeting
- Friday Feb. 17, 13:30 Session IVa (120) --- Calorimetry - (Organizer: Zisis Papandreou ) - Chair
- Update from USM
- Status of Testing at JLab
- BCAL Beam Test
- Other
Minutes
Attending: Elton, Eugene, John L., John C., Yi, Sasha, Beni (Jlab); Will, Hayk, Javiera, Orlando Soto (USM); Zisis, George, Andrei (UofR); Christina (Athens).
- Announcements
- Review of Action Items
- Calorimetry Talks at the Collaboration Meeting
- Friday Feb. 17, 13:30 Session IVa (120) --- Calorimetry - (Organizer: Zisis Papandreou ) - Chair
- Four talks scheduled. Offline will be discussed how the information is presented on the SiPM
- Friday Feb. 17, 13:30 Session IVa (120) --- Calorimetry - (Organizer: Zisis Papandreou ) - Chair
- BCAL Beam Test
- Electronics (Sasha)
- On hand: 48 channels of FlashADCs (Need: 32 channels for miniBcal + trigger and spares)
- On hand: 32 channels of F1 TDC (Need: 32 channels from Beni)
- On hand: 16 channels of Discriminator (Need: 32 channels, need to secure one more)
- On hand: NIM bin + logic available
- Need: trigger scintillators
- Need: additional VXS crates, etc unless we can share with Fcal
- Schedule (John)
- Next week Fcal and Hall B will conduct a joint test to establish electron energies into detector
- 1-2 Weeks electron beam test
- 1-2 weeks 2 pass photon beam
- Target change, mid March
- 1-2 weeks 3 pass photon beam
- Remainder of time 5 pass photon beam (April/May)
- Fcal would like to accumulate data in alcove at three energies
- Perform all Flash DAQ tests before moving down to Hall B floor
- Paperwork (Zisis)
- Prepare executive summary in the next few days so that Eugene can talk to Volker
- DRAFT Proposal will follow later this week for feedback
- Electronics (Sasha)
- Update from Athens
- Submitted designs for all boards and submitted to JLab
- Fernando will review and provide feedback
- Started to build first article
- Boards should be received next week and can be populated
- If possible the boards will be tested in Hall B with mini-Bcal
- Submitted designs for all boards and submitted to JLab
- Update from USM
- Run manager report
- Testing has started in Stage 2 after some faulty starts and minor repairs of setup
- So far measured six JLab SiPMs and more from Hamamatsu
- Stage 3 refurbished to start testing
- Amps with low gain replaced
- Presently testing more JLab MPPCs
- Added thermal pad (1 mm 2000S40) for half the sensors to check systematics
- Station 2 analysis (Sergey)
- Revision of all data
- Updated conversion factors based on photodiode data and spectral response
- USM results compare favorably with Musienko data from CMS
- Comparison of PDE, gain, DR and cross talk compares well with JLab data, although some systematic differences remain.
- All parameters measured at Vbr+0.9 V. [Yi: JLab used the Hamamatsu proposed operating voltage, which was measured to be about Vbr+0.95V].
- JLab gain about 5.5x10^5, USM gives about 5.0x10^5.
- JLab PDE about 20%, USM gives about 24%
- Sergey: Uniformity of PDE over the MPPC is very good
- Yi: Compared the two methods of extracting PDE: N0 in ped vs full fit. Differences due to method is less than 1%.
- Station 3 analysis (Hayk)
- New data shown. Data taken with <Npe>~2.5 compared to 1.5 for previous data.
- Still need to remeasure some amplifiers
- Fitting routine takes about 30 min/MPPC. Fast algorithm is about 6 times faster, but fitting will be used.
- Based on today's presentation, Elton will send message to the listserver approving production testing at USM. Full approval of Stage 1 and 2. Conditional approval of Stage 3 based on USM verifying proper thermal contacts of MPPCs to cooling plate.
- USM Web Interface to DB
- Run manager report
- Status of Testing at JLab
- Hall-D ELOG
- Preliminary data is now being taken. Chiller set to 10 deg C.
- Two preamp boards populated (8 channels)
- Problem with DC offset out of original board.
- Revised board replaced resistor with a capacitor to eliminate baseline. Data shown are for the board with the capacitor.
- Data shown for 200 ns gate. Signal to noise decreases as gate is increased.
- Spectra with Chiller ON
- Some photos
- Hall-D ELOG
- Other