Difference between revisions of "Mar 18, 2010 Calorimetry"

From GlueXWiki
Jump to: navigation, search
 
(Minutes)
 
(17 intermediate revisions by 2 users not shown)
Line 11: Line 11:
  
 
=Items for followup from previous meeting(s)=
 
=Items for followup from previous meeting(s)=
# Calibration/Monitoring
+
# Monitoring
#* Geometry for inputing monitoring sources into Bcal ([[Media:mom_gamma_log.png]])
+
#* Matt to coordinate with Christina on the shipment of glass blocks and pmts/dividers for monitoring system test.
 +
#* Bcal: Testing to see if LED sources can be viewed by pmts on both sides of the module (UofR).
 
# Fcal
 
# Fcal
#* Specify the number of Rad Hard blocks to writeup a change request to the project.
+
#* Decision on rad hard detectors
#* Investigate mechanical issues associated with supporting lead glass on top of shashlyk modules (Lubomir, Serguei). Will to send drawings of the modules.
+
#* Check instability of FEU-84 pmt gains / finalize number / order additional FEU-84 pmts
# Bcal
+
#* Specify the normalization and dynamic range for the number of photons/GeV in showers
+
#* Decide on specific grouping for SiPM sums
+
#* Possibility of using air gap for SiPM coupling
+
#* Finalize shapes of "Winston guides"
+
# Simulations:
+
#* List of energies and angles to be simulated for the purpose of establishing the dynamic range of light to the SiPMs.
+
  
 
= Documents to Review=
 
= Documents to Review=
Line 30: Line 24:
 
# Announcements
 
# Announcements
 
# Review of Action Items
 
# Review of Action Items
# Calibration/Monitoring  
+
# Calibration/Monitoring [[Media:Cal-18-3-09-ath.ppt]]
## Light sources in Bcal
+
## Project schedule
+
##* FCAL activity Fab monitoring system 15222080 (delayed by a year in Oct)
+
##* BCAL activity Proc aux equipment incl. calibration 15221055
+
 
# FCAL
 
# FCAL
## Radiation Damage Inserts
+
#* Construction status
##* Shashlyk option
+
#* Proceed with order of FEU-84 pmts?
## Procurement Contract
+
#* To shashlyk or not to shashlyk
##* EVMS reporting and project schedule
+
##* Scheduling the [[Fcal Fabrication Readiness Review]]
+
## Update on FEU-84-3 PMTs [[media:Feu_pmt_melz.pdf|slides]]
+
 
# BCAL
 
# BCAL
## Construction Status
+
#* Construction Status
## Fibre tests [[Media:Shipments8and9plots.pdf]]
+
#* Module 1 Uniformity [[Media:Module1-Uniformity.pdf]]
# BCAL Readout
+
# Simulations
## Simulations
+
# Other Updates
## SiPMs
+
##* [http://www.jlab.org/Hall-D/software/wiki/images/1/1a/HAMAMATSU3x3.pdf Measurements at USM]
+
## Geometry for guides, sensors, cooling and cables
+
## Update on USM MOU
+
# Other business
+
  
 
=Minutes=
 
=Minutes=
  
Attendees:
+
Attendees:Fernando, Yi, John, Pedro, Tim, Eugene, Elton, Beni, Lubomir, Sasha (JLab); Zisis, Andrei, George (UofR); George, Christina (Athens); Ryan (IU)
  
 +
# Announcements
 +
# Review of Action Items
 +
# Calibration/Monitoring [[Media:Cal-18-3-09-ath.ppt]]
 +
## Adapter manufactured to shine LED to bundle of 16 fibers
 +
## LED pulsed at 10 V, uniformity sigma=70 mV, and average ~ 600 mV.
 +
## Likely will need difuser for the final system
 +
## Will: should plan for one extra fiber per LED to monitor sensor of multiple LEDs.
 +
## Regina: Have circuit for LED to be used for testing near/far light collection. Use 2x2 cm2 Winston cones and setup initially with pmts. Will also study coupling of LED to lightguide.
 +
## George V: preliminary test conducted with Baby Bcal and transmit about 25% of light (encouraging). With additional attenuation, might expect a ratio of 1/10 between near and far sensors.
 +
## Eugene: Consider system where fiber bundle is mechanically attached to light guide group.
 +
# FCAL
 +
## Rad hard glass resolution studies ongoing. Preliminary results shos that reesolution might be worse than first estimated.
 +
## Proceed with order of FEU-84 pmts?
 +
##* JLab has told company that checking pmts will be completed in March, so that order can be sent out.
 +
##* Gain stability has been good over a few days.
 +
## To shashlyk or not to shashlyk. Postpone discussion to furture meeting. First need to decide how decision will be made.
 +
# BCAL
 +
##Construction status
 +
### Module 05 is up to 170 layers, Module 06 up to 130 layers.
 +
### By March 24 Module 04 will be finished at RMS and so will be the go-no-go gauge for the alignment pins.
 +
### On March 27 (Saturday) we are going to RMS to carry out the transmission uniformity tests for Modules 02-04 and go over all travellers.
 +
### We hope to ship the modules to JLab just before or right after Easter weekend.
 +
## Fibre tests (Shipment 10) are proceeding nominally.
 +
## Lead tally is done, we need a teleconference (JLab-Regina) to decide on the quantity of lead for the last shipment and other logistics.
 +
##* Tim checked with Vulcan. They are preparing the fourth and last shipment for middle of next week. If make-up amount is a few percent, they will add to this shipment. Otherwise, they will schedule a 5th smaller shipment.
 +
##* (Phone conferencen tomorrow afternoon at 4:00 pm eastern).
 +
## [[Media:Module1-Uniformity.pdf]]  Module 1 uniformity looks reasonable within accuracy of method.
 +
##* (Notes added by Elton): Poor environment for measurements. Will go on Saturday March 27 to avoid congestion when testing mods 2-4.
 +
##* Proposal for testing modules 5-48: Use single light source with photographic umbrella and take digital picture for permanent record.
 +
# Simulations
 +
## List of runs to be discussed at Bcal readout meeting (next week)
 +
# Other Updates
 
# BCAL
 
# BCAL
## Construction
 
### All equipment operating nominally.  Builds growing within tolerances.
 
### Mod 04 to RMS today or tomorrow; Mod 05 at 50%, Mod 06 at 10%.  Two new crates arrived yesterday.
 
### Mod 02 and 03 machining most likely finished.
 
### Lead tally nearly done; some discrepancies.  Will communicate with JLab and Vulcan today.
 
### Enough epoxy for 2.5 months on hand, 9 gallons back ordered.
 
### Shipping insurance sorted out and waiting to meet with shippers and get new quotations.
 
## Fibres
 
### Shipment 8 done and 100 fibres from No. 9 (see above links). Means shifted for shipment 9, for both Npe and atten length.  Most likely a real effect but we're checking.
 
## RMS visit: March 5.
 
### Final contract will be given to RMS tomorrow.
 
### Inspection and pictures of Mod 02 and 03 machining.
 
### Transmission uniformity test on Module 01.
 

Latest revision as of 12:52, 18 March 2010

Teleconference Time: 11:00 a.m. EST

  • ESNET and EVO session
  • Phone in CC F326 is 757-269-6337
  • Phone in the Regina Videoconference Suite is 306-585-4204
  • Phone only if requested:
    • +1-800-377-8846 : US
    • +1-888-276-7715 : Canada
    • +1-302-709-8424 : International
    • then enter participant code: 77438230# (remember the "#"). Phone line by request only.

Items for followup from previous meeting(s)

  1. Monitoring
    • Matt to coordinate with Christina on the shipment of glass blocks and pmts/dividers for monitoring system test.
    • Bcal: Testing to see if LED sources can be viewed by pmts on both sides of the module (UofR).
  2. Fcal
    • Decision on rad hard detectors
    • Check instability of FEU-84 pmt gains / finalize number / order additional FEU-84 pmts

Documents to Review

Tentative Agenda

  1. Announcements
  2. Review of Action Items
  3. Calibration/Monitoring Media:Cal-18-3-09-ath.ppt
  4. FCAL
    • Construction status
    • Proceed with order of FEU-84 pmts?
    • To shashlyk or not to shashlyk
  5. BCAL
  6. Simulations
  7. Other Updates

Minutes

Attendees:Fernando, Yi, John, Pedro, Tim, Eugene, Elton, Beni, Lubomir, Sasha (JLab); Zisis, Andrei, George (UofR); George, Christina (Athens); Ryan (IU)

  1. Announcements
  2. Review of Action Items
  3. Calibration/Monitoring Media:Cal-18-3-09-ath.ppt
    1. Adapter manufactured to shine LED to bundle of 16 fibers
    2. LED pulsed at 10 V, uniformity sigma=70 mV, and average ~ 600 mV.
    3. Likely will need difuser for the final system
    4. Will: should plan for one extra fiber per LED to monitor sensor of multiple LEDs.
    5. Regina: Have circuit for LED to be used for testing near/far light collection. Use 2x2 cm2 Winston cones and setup initially with pmts. Will also study coupling of LED to lightguide.
    6. George V: preliminary test conducted with Baby Bcal and transmit about 25% of light (encouraging). With additional attenuation, might expect a ratio of 1/10 between near and far sensors.
    7. Eugene: Consider system where fiber bundle is mechanically attached to light guide group.
  4. FCAL
    1. Rad hard glass resolution studies ongoing. Preliminary results shos that reesolution might be worse than first estimated.
    2. Proceed with order of FEU-84 pmts?
      • JLab has told company that checking pmts will be completed in March, so that order can be sent out.
      • Gain stability has been good over a few days.
    3. To shashlyk or not to shashlyk. Postpone discussion to furture meeting. First need to decide how decision will be made.
  5. BCAL
    1. Construction status
      1. Module 05 is up to 170 layers, Module 06 up to 130 layers.
      2. By March 24 Module 04 will be finished at RMS and so will be the go-no-go gauge for the alignment pins.
      3. On March 27 (Saturday) we are going to RMS to carry out the transmission uniformity tests for Modules 02-04 and go over all travellers.
      4. We hope to ship the modules to JLab just before or right after Easter weekend.
    2. Fibre tests (Shipment 10) are proceeding nominally.
    3. Lead tally is done, we need a teleconference (JLab-Regina) to decide on the quantity of lead for the last shipment and other logistics.
      • Tim checked with Vulcan. They are preparing the fourth and last shipment for middle of next week. If make-up amount is a few percent, they will add to this shipment. Otherwise, they will schedule a 5th smaller shipment.
      • (Phone conferencen tomorrow afternoon at 4:00 pm eastern).
    4. Media:Module1-Uniformity.pdf Module 1 uniformity looks reasonable within accuracy of method.
      • (Notes added by Elton): Poor environment for measurements. Will go on Saturday March 27 to avoid congestion when testing mods 2-4.
      • Proposal for testing modules 5-48: Use single light source with photographic umbrella and take digital picture for permanent record.
  6. Simulations
    1. List of runs to be discussed at Bcal readout meeting (next week)
  7. Other Updates
  8. BCAL