Difference between revisions of "Mar 27, 2012 Calorimetry"
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# Review of Action Items | # Review of Action Items | ||
# Monitoring | # Monitoring | ||
+ | ## First controller board | ||
+ | ##* Arrived from Athens and has been installed on the mini-Bcal. Signals have not yet been checked. | ||
+ | ## Second controller board | ||
+ | ##* Order has been lost. | ||
+ | ##* Unclear if it will be easy to add the second controller board to the mini-Bcal before (during) the beamtest | ||
+ | ##* Decided that it would be useful to have the second controller anyway for mini-Bcal testing with cosmics this summer. | ||
+ | ##* Christina will clear up initial order, then order the second controller so we can have it on hand as soon as it is needed | ||
+ | ## Customs issues for SiPM loan | ||
+ | ##* We and considering hand carrying the items. | ||
# [https://mailman.jlab.org/pipermail/halld-cal/2012-March/000556.html Cable Labels] | # [https://mailman.jlab.org/pipermail/halld-cal/2012-March/000556.html Cable Labels] | ||
+ | #* Elton asked Matt and Zisis to review labels for Fcal and Bcal, respectively | ||
# FCAL | # FCAL | ||
## Construction Status | ## Construction Status | ||
+ | ##* Continue to glue light guides | ||
+ | ##* Cockcroft-Walton bases iterations with company | ||
+ | ##* Company has produced a draft schedule with milestones for delivery of all bases, but the schedule has already changed since then | ||
+ | ##* Issue is the conformal coating of the HV boards. They have contracted with a 3rd party vendor to coat 1900 units. IU will be able to inspect production before and after coating | ||
+ | ##* About 500 are being coated at the company and will be shipped soon to IU for inspection | ||
+ | ##* The first 500 assembled units are being taken apart a IU and recoated. | ||
+ | ##* The present schedule will have all bases completed by the end of April. | ||
+ | ##* The TRAN board is being produced satisfactorily | ||
+ | ##* the socket board is produced in house and we anticipate no problems. | ||
+ | ##* The completion of the project by June is very tight. Will re-evaluate situation next month. | ||
+ | ## Support Structure | ||
+ | ##* John L. is at IU and discussing cabling issues with John F. | ||
+ | ##* Have all the certification docs from vendor except for the inspector's certification. Tim agrees that the contract should go forward and all final certifications obtained during fabrication. | ||
## [[2011 Hall B FCAL Beam Test]] (John) | ## [[2011 Hall B FCAL Beam Test]] (John) | ||
+ | ##* Hall B is at 4 pass. Changeover to 5 pass was unsuccessful last week but accelerator has found the problem and expect to delivery 5 pass (electron) beam till next Monday. | ||
+ | ##* Integrated Fcal and Hall B data were taken successfully to characterize the remote scintillators | ||
# BCAL | # BCAL | ||
## [[BCAL Beam Tests 2012]] | ## [[BCAL Beam Tests 2012]] | ||
+ | ##* Bcal readout assemblies were successfully put together and tested with LEDs last week, | ||
+ | ##* The assemblies are presently mounted on the mini-Bcal. | ||
+ | ##* Hovanes has written some EPICS GUIs to control the 5V and bias lines. | ||
+ | ##* We were able to power one cell and see some cosmic-ray pulses on the scope. More checks to follow | ||
+ | ##* Alex is starting to setup the DAQ system | ||
# USM update | # USM update | ||
## Production manager report (Javiera) | ## Production manager report (Javiera) | ||
+ | ### Stage 1. Photos of 510 MPPCs taken and are being loaded to the dB | ||
+ | ### Stage 2. | ||
+ | ###* Problems included delivering the bias to the units | ||
+ | ###* Data were taken when the reference PMT was in the wrong position, leading to incorrect PDE values | ||
+ | ###* Issues corrected and new data are being taken | ||
+ | ### Stage 3 | ||
+ | ###* Took data to see if second p.e. peak was visible | ||
+ | ###* Increased DAQ rate so that scans can be taken more quickly | ||
+ | ###* Readout in the dark box have been fixed, bringing the total number of working channels to 31. | ||
+ | ###* To date a total of 270 sensors have been measured, but only 108 have all analysis completed. | ||
## [https://halldweb1.jlab.org/wiki/images/b/b3/Temperature_Orlando.pdf Station 3 temperature measurements (Orlando)] | ## [https://halldweb1.jlab.org/wiki/images/b/b3/Temperature_Orlando.pdf Station 3 temperature measurements (Orlando)] | ||
+ | ##* Very high uniformity of temperature was measured on the copper plate at three different temperatures. | ||
+ | ##* Will suggested to show some data when the temperature was changing to verify correct operation of system. | ||
## [https://halldweb1.jlab.org/wiki/images/2/2f/Number_photoel.pdf Analytical analysis of light production and cross talk (Orlando and Sergey)] | ## [https://halldweb1.jlab.org/wiki/images/2/2f/Number_photoel.pdf Analytical analysis of light production and cross talk (Orlando and Sergey)] | ||
+ | ##* Slides were shown with comparison of MC with analytical formulas for mean and sigma. | ||
+ | ##* Used same notation as Yi | ||
## [https://halldweb1.jlab.org/wiki/images/3/37/X-talk.pdf New evaluation of cross talk using analytical formulas (Orlando)] | ## [https://halldweb1.jlab.org/wiki/images/3/37/X-talk.pdf New evaluation of cross talk using analytical formulas (Orlando)] | ||
+ | ##* Good consistency between analytical method and fitting technique. | ||
## [https://halldweb1.jlab.org/wiki/images/8/8b/03_27_my_pres_Hall-D.pdf Station 3 data analysis (Hayk)] | ## [https://halldweb1.jlab.org/wiki/images/8/8b/03_27_my_pres_Hall-D.pdf Station 3 data analysis (Hayk)] | ||
+ | ##* Showed uniformity of data from Stage 3 analysis for all quantities except dark rate. | ||
+ | ##* Open discussion regarding acceptance criteria for the sensors completing this stage 3 test. | ||
+ | ##* The extraction of the dark rate is problematic at room temperature and relatively low voltage (Vbr + 0.9V). | ||
+ | ##* Considering robust extraction of the dark rate in all conditions. | ||
## Update on lightguide production (Iñaki) | ## Update on lightguide production (Iñaki) | ||
+ | ### Profile projector | ||
+ | ###* Measurements of unpolished guides difficult due to large edges producing shadows over small edges | ||
+ | ###* Polished guides also present some difficulties with some dimensions | ||
+ | ###* The length of the table is not long enough to accommodate the 8 cm light guide. Elton suggested that a caliper could be used for this dimension | ||
+ | ### Go/no-go gauges | ||
+ | ###* Used a laser cutter to produce test gauge | ||
+ | ###* Need to establish how much material is machined away to compensate for final dimensions | ||
+ | ###* Use of gauges complicated because the light guides have angles. Elton: Suggest to make he gauge sufficiently thick to guide the light guide straight through (at least for the base). | ||
+ | ### CNC machine | ||
+ | ###* Parts to solve the problem with the x-position controller arrive yesterday | ||
+ | ###* The system is being checked out now to see if the new parts fix the problem. | ||
# TDR update | # TDR update | ||
## [[Private:Instructions for the TDR | Instructions for the TDR]] (You must be logged into the wiki to access this page). | ## [[Private:Instructions for the TDR | Instructions for the TDR]] (You must be logged into the wiki to access this page). |
Revision as of 18:22, 27 March 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+Canada
- +1-303-248-0285 : International
- then enter participant code: 3421244# (remember the "#").
- or www.readytalk.com (and code without the #)
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(s)
Tentative Agenda
- Announcements
- Review of Action Items
- Monitoring
- Cable Labels
- FCAL
- Construction Status
- 2011 Hall B FCAL Beam Test (John)
- BCAL
- USM update
- Production manager report (Javiera)
- Station 3 temperature measurements (Orlando)
- Analytical analysis of light production and cross talk (Orlando and Sergey)
- New evaluation of cross talk using analytical formulas (Orlando)
- Station 3 data analysis (Hayk)
- Update on lightguide production (Iñaki)
- TDR update
- Instructions for the TDR (You must be logged into the wiki to access this page).
- We need to start revising Chapter 4 Detector, Section 4.3 Calorimetry.
- Calibration of Calorimeters
- Simulations/Reconstruction
- Any other business
Minutes
Attending: Elton, David, Tim (JLab); Will, Sergey, Orlando, Javiera, Hayk, Iñaki (USM): Matt, John (IU); Zisis, Andrei (UofR); Christina, George (Athens)
- Announcements
- Review of Action Items
- Monitoring
- First controller board
- Arrived from Athens and has been installed on the mini-Bcal. Signals have not yet been checked.
- Second controller board
- Order has been lost.
- Unclear if it will be easy to add the second controller board to the mini-Bcal before (during) the beamtest
- Decided that it would be useful to have the second controller anyway for mini-Bcal testing with cosmics this summer.
- Christina will clear up initial order, then order the second controller so we can have it on hand as soon as it is needed
- Customs issues for SiPM loan
- We and considering hand carrying the items.
- First controller board
- Cable Labels
- Elton asked Matt and Zisis to review labels for Fcal and Bcal, respectively
- FCAL
- Construction Status
- Continue to glue light guides
- Cockcroft-Walton bases iterations with company
- Company has produced a draft schedule with milestones for delivery of all bases, but the schedule has already changed since then
- Issue is the conformal coating of the HV boards. They have contracted with a 3rd party vendor to coat 1900 units. IU will be able to inspect production before and after coating
- About 500 are being coated at the company and will be shipped soon to IU for inspection
- The first 500 assembled units are being taken apart a IU and recoated.
- The present schedule will have all bases completed by the end of April.
- The TRAN board is being produced satisfactorily
- the socket board is produced in house and we anticipate no problems.
- The completion of the project by June is very tight. Will re-evaluate situation next month.
- Support Structure
- John L. is at IU and discussing cabling issues with John F.
- Have all the certification docs from vendor except for the inspector's certification. Tim agrees that the contract should go forward and all final certifications obtained during fabrication.
- 2011 Hall B FCAL Beam Test (John)
- Hall B is at 4 pass. Changeover to 5 pass was unsuccessful last week but accelerator has found the problem and expect to delivery 5 pass (electron) beam till next Monday.
- Integrated Fcal and Hall B data were taken successfully to characterize the remote scintillators
- Construction Status
- BCAL
- BCAL Beam Tests 2012
- Bcal readout assemblies were successfully put together and tested with LEDs last week,
- The assemblies are presently mounted on the mini-Bcal.
- Hovanes has written some EPICS GUIs to control the 5V and bias lines.
- We were able to power one cell and see some cosmic-ray pulses on the scope. More checks to follow
- Alex is starting to setup the DAQ system
- BCAL Beam Tests 2012
- USM update
- Production manager report (Javiera)
- Stage 1. Photos of 510 MPPCs taken and are being loaded to the dB
- Stage 2.
- Problems included delivering the bias to the units
- Data were taken when the reference PMT was in the wrong position, leading to incorrect PDE values
- Issues corrected and new data are being taken
- Stage 3
- Took data to see if second p.e. peak was visible
- Increased DAQ rate so that scans can be taken more quickly
- Readout in the dark box have been fixed, bringing the total number of working channels to 31.
- To date a total of 270 sensors have been measured, but only 108 have all analysis completed.
- Station 3 temperature measurements (Orlando)
- Very high uniformity of temperature was measured on the copper plate at three different temperatures.
- Will suggested to show some data when the temperature was changing to verify correct operation of system.
- Analytical analysis of light production and cross talk (Orlando and Sergey)
- Slides were shown with comparison of MC with analytical formulas for mean and sigma.
- Used same notation as Yi
- New evaluation of cross talk using analytical formulas (Orlando)
- Good consistency between analytical method and fitting technique.
- Station 3 data analysis (Hayk)
- Showed uniformity of data from Stage 3 analysis for all quantities except dark rate.
- Open discussion regarding acceptance criteria for the sensors completing this stage 3 test.
- The extraction of the dark rate is problematic at room temperature and relatively low voltage (Vbr + 0.9V).
- Considering robust extraction of the dark rate in all conditions.
- Update on lightguide production (Iñaki)
- Profile projector
- Measurements of unpolished guides difficult due to large edges producing shadows over small edges
- Polished guides also present some difficulties with some dimensions
- The length of the table is not long enough to accommodate the 8 cm light guide. Elton suggested that a caliper could be used for this dimension
- Go/no-go gauges
- Used a laser cutter to produce test gauge
- Need to establish how much material is machined away to compensate for final dimensions
- Use of gauges complicated because the light guides have angles. Elton: Suggest to make he gauge sufficiently thick to guide the light guide straight through (at least for the base).
- CNC machine
- Parts to solve the problem with the x-position controller arrive yesterday
- The system is being checked out now to see if the new parts fix the problem.
- Profile projector
- Production manager report (Javiera)
- TDR update
- Instructions for the TDR (You must be logged into the wiki to access this page).
- We need to start revising Chapter 4 Detector, Section 4.3 Calorimetry.
- Calibration of Calorimeters
- Simulations/Reconstruction
- Any other business