Difference between revisions of "Jun 18, 2009 Readout"
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# Discussion of readout options | # Discussion of readout options | ||
#* [[Private:Readout Cost Estimates]] | #* [[Private:Readout Cost Estimates]] | ||
− | #* FM light guides (See updated [ | + | #* FM light guides (See updated [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1287 GlueX-doc-1287]) |
#* [http://clasweb.jlab.org/elton/halld/temp/eltonbcalreadout.pdf Mechanical model] (by Hutton) | #* [http://clasweb.jlab.org/elton/halld/temp/eltonbcalreadout.pdf Mechanical model] (by Hutton) | ||
# Bcal Readout Review (July 21) | # Bcal Readout Review (July 21) | ||
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#* Delivery of second shipment. Respond to Kuraray with acceptance of proposed July 1 date for second delivery. | #* Delivery of second shipment. Respond to Kuraray with acceptance of proposed July 1 date for second delivery. | ||
# Discussion of readout options | # Discussion of readout options | ||
− | ## FM light guides (See updated [ | + | ## FM light guides (See updated [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1287 GlueX-doc-1287]) |
##* New acceptance studies have been included into the GlueX note. In summary, the long FM light guides collect less than half the light of the SiPMs. | ##* New acceptance studies have been included into the GlueX note. In summary, the long FM light guides collect less than half the light of the SiPMs. | ||
## [http://clasweb.jlab.org/elton/halld/temp/eltonbcalreadout.pdf Mechanical model] (by Hutton) | ## [http://clasweb.jlab.org/elton/halld/temp/eltonbcalreadout.pdf Mechanical model] (by Hutton) |
Latest revision as of 17:05, 24 February 2017
Teleconference Time: 11:00 a.m. EST
- EVO session
- Phone:
- +1-800-377-8846 : US
- +1-888-276-7715 : Canada
- +1-302-709-8424 : International
- then enter participant code: 39527048# (remember the "#")
Contents
Items for followup from previous meeting
- Will to propose detailed plan for prototyping for feedback. Sketch of test setup could help visualization.
- Link report to GlueX wiki (Eduardo)
-
Feedback to Andrei on MC generated events. -
Cost estimates for readout options (Elton). -
Generate priority list for shower reconstruction work (Sasha and Elton) - Make progress on USM MOU document (Elton, Will, Eugene)
Documents to Review
- Discussion from June 25, 2009 Calorimetry
Tentative Agenda
- Announcements
- Review of Action Items
- USM report
- Prototyping
- Fibers
- Acceptance of first shipment
- Delivery of second shipment
- Discussion of readout options
- Private:Readout Cost Estimates
- FM light guides (See updated GlueX-doc-1287)
- Mechanical model (by Hutton)
- Bcal Readout Review (July 21)
- Stefano Miscetti will participate via video
- Other reviewers?
- Tentative agenda
- Simulations
- Background from Cerenkov light (Sasha)
- Andrei will complete simulations of number of visible photons per GeV.
- Discussions on MOU with USM
Minutes
Attending: JLab: Elton, Beni, Sasha, Eugene, USM: Alam, George, Will, Pedro; UofR: Andrei
- Announcements
- Review of Action Items
- USM report
- Pedro's presentation
- Added GlueX-doc-1291 and requests feedback
- Started from GlueX-doc-1279, and studied optimization of pmt positions in the field. Determined that the optimal angle is 27.3 deg based on the gain sensitivity to the B-field over 2 degree interval.
- Used 'Solid Works' 3-D cad system to place PMTs at a nominal location of 30 deg relative to the field. Elton: noted that the location of the calorimeter relative to the field was shifted and this needs to be updated.
- It is great to see that the USM has some of these modeling tools which will be very useful in laying out light guides for FM pmts.
- JLab should send files from I-deas that can be imported into their cad system.
- Pedro's presentation
- Prototyping
- Fibers
- Acceptance of first shipment. Decided to accept current batch of fibers but verify npe numbers with further measuremnts.
- Delivery of second shipment. Respond to Kuraray with acceptance of proposed July 1 date for second delivery.
- Discussion of readout options
- FM light guides (See updated GlueX-doc-1287)
- New acceptance studies have been included into the GlueX note. In summary, the long FM light guides collect less than half the light of the SiPMs.
- Mechanical model (by Hutton)
- First look at the two options: FM (outer) + SiPM (inner) and all FM pmts. We will require iterations to clarify some issues especially related to the cooling options for SiPMs.
- FM light guides (See updated GlueX-doc-1287)
- Bcal Readout Review (July 21). Elton has sent out a draft proposal to a few people for initial feedback.
- Stefano Miscetti will participate via video
- Other reviewers: Suggested ask Stepan if he would be willing to participate in review
- Will: The choice involves evaluating a "off-the-shelf" option with limitations to a "risky" option with little track record. Thus the choice is one of judgement and it might be worth including somebody with project management experience in the review.
- Tentative agenda
- Simulations
- Background from Cerenkov light (Sasha)
- Geometry for studies has been setup. Studies of background will be sent out shortly.
- Andrei will complete simulations of number of visible photons per GeV.
- Has produced a new file at 2 GeV and 20 deg.
- Beni: Noted that the showers are produced (over a 1 cm impact position) at the center of the module. This may limit the range of energies deposited in each cell. We requested a 2 GeV, 20 deg shower but with impact positions at the center of a cell (i.e offset from the center of the module itself). This might be useful for dynamic range studies.
- Background from Cerenkov light (Sasha)