Difference between revisions of "Oct 22, 2009 Readout"
From GlueXWiki
(→Minutes) |
|||
| Line 36: | Line 36: | ||
= Minutes = | = Minutes = | ||
| + | Attending: Elton, Beni, John, Tim, Sascha, Fernando, Eugene (JLab); Zisis, Andrei (UofR); Will, Alam (USM) | ||
# Announcements | # Announcements | ||
| Line 41: | Line 42: | ||
#* Alam sent an e-mail this morning to Zisis and Will indicating that payment has been made for the shipment of the Baby Bcal. Zisis will check on the shipment itself and send an e-mail confirmation. | #* Alam sent an e-mail this morning to Zisis and Will indicating that payment has been made for the shipment of the Baby Bcal. Zisis will check on the shipment itself and send an e-mail confirmation. | ||
# [[Detailed plan for testing production SiPM units | Plan for SiPM Testing]] (Carl and Fernando) | # [[Detailed plan for testing production SiPM units | Plan for SiPM Testing]] (Carl and Fernando) | ||
| − | # | + | #* Fernando has assembled boards for the Hamamatsu units and has taken a first look at output signals. |
| + | #* Using a 5 ns LED (1ns rise time), SiPM output has a rise time of about 15 ns and total length of 90 ns. Bias voltage is set according to Hamamatsu corresponding to a gain of 7.5x10^5 (about 70.5 V for this SiPM). | ||
| + | #* Fernando will distribute a brief report by tomorrow on initial look at the Hamamatsu sensors. | ||
| + | #* Elton reported that Carl Jackson from SensL communicated that they believe they have fixed their packaging problem and will have units to verify the new process by today. After confirming the fix to the problem, they will send us a schedule for the 10 units that were ordered. | ||
| + | #* Carl is traveling to the IEEE conference next week and will meet with Hamamatsu and SensL representatives, and report on preliminary look at the Hamamatsu units. | ||
| + | #* Eugene: One test that should be included in the plan is to use two independent LED pulsers and check the linearity of response when they come close together in time. | ||
# USM report | # USM report | ||
# Light Guide Geometry | # Light Guide Geometry | ||
# Light Guide Simulations | # Light Guide Simulations | ||
# Discussions on MOU with USM | # Discussions on MOU with USM | ||
Revision as of 14:36, 22 October 2009
Teleconference Time: 11:00 a.m. EST
- ESNET and EVO session
- Phone:
- +1-800-377-8846 : US
- +1-888-276-7715 : Canada
- +1-302-709-8424 : International
- then enter participant code: 77438230# (remember the "#"). Phone connection only upon request.
Contents
Items for followup from previous meeting
-
Ship Baby Bcal to USM. -
Alam (Pedro) to post files for new geometry of light guides.
Documents to Review
- Media:Draw trigs 38deg.pdf Media:Draw trigs 73deg.pdf for segment #2.
- Entrance rectangle is 3.01x4.0 cm. Exit radius is 1.35 cm. Length of trapezoid/cone is 60 cm, and length of torus is also 60 cm.
- This configuration should be comparable to Alam's "cylindrical cone" geometry.
- See also Effective diameter vs B field and angle from Antonelli et al., NIMA 368 (1996) 628-634.
- Magnetic field plots
- Light guide prototypes. See Quote from Plastic Craft and Ray tracing through light guides
Tentative Agenda
- Announcements
- Review of Action Items
- Plan for SiPM Testing (Carl and Fernando)
- USM report
- Light Guide Geometry
- Light Guide Simulations
- Discussions on MOU with USM
Minutes
Attending: Elton, Beni, John, Tim, Sascha, Fernando, Eugene (JLab); Zisis, Andrei (UofR); Will, Alam (USM)
- Announcements
- Review of Action Items
- Alam sent an e-mail this morning to Zisis and Will indicating that payment has been made for the shipment of the Baby Bcal. Zisis will check on the shipment itself and send an e-mail confirmation.
- Plan for SiPM Testing (Carl and Fernando)
- Fernando has assembled boards for the Hamamatsu units and has taken a first look at output signals.
- Using a 5 ns LED (1ns rise time), SiPM output has a rise time of about 15 ns and total length of 90 ns. Bias voltage is set according to Hamamatsu corresponding to a gain of 7.5x10^5 (about 70.5 V for this SiPM).
- Fernando will distribute a brief report by tomorrow on initial look at the Hamamatsu sensors.
- Elton reported that Carl Jackson from SensL communicated that they believe they have fixed their packaging problem and will have units to verify the new process by today. After confirming the fix to the problem, they will send us a schedule for the 10 units that were ordered.
- Carl is traveling to the IEEE conference next week and will meet with Hamamatsu and SensL representatives, and report on preliminary look at the Hamamatsu units.
- Eugene: One test that should be included in the plan is to use two independent LED pulsers and check the linearity of response when they come close together in time.
- USM report
- Light Guide Geometry
- Light Guide Simulations
- Discussions on MOU with USM
