Mar 18, 2010 Calorimetry
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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.
Contents
Items for followup from previous meeting(s)
- 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).
- 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
- Announcements
- Review of Action Items
- Calibration/Monitoring Media:Cal-18-3-09-ath.ppt
- FCAL
- Construction status
- Proceed with order of FEU-84 pmts?
- To shashlyk or not to shashlyk
- BCAL
- Construction Status
- Module 1 Uniformity Media:Module1-Uniformity.pdf
- Simulations
- Other Updates
Minutes
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.
- Construction status
- Simulations
- List of runs to be discussed at Bcal readout meeting (next week)
- Other Updates
- BCAL