Difference between revisions of "May 8, 2014 Calorimetry"
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# Announcements | # Announcements | ||
| + | #* CEBAF delivered 10.5 GeV beam to the tagger dump last night! | ||
# [[GlueX-Collaboration-May-2014|Collaboration Meeting]] May 12-14 | # [[GlueX-Collaboration-May-2014|Collaboration Meeting]] May 12-14 | ||
# Action Items | # Action Items | ||
# FCAL | # FCAL | ||
| − | #* [https://logbooks.jlab.org/book/hdfcal HDFCAL log book] | + | #* [https://logbooks.jlab.org/book/hdfcal HDFCAL log book] (John) |
| + | #* Fcal detector continues to work with no known problems | ||
| + | #* New firmware installed on Fadcs seems to have addressed all known problems with the Fadcs | ||
| + | #* Log book entry shows timing of LED pulser run, with the timing determined by the IU "linear interpolation" method | ||
| + | #* David: Note that the hardware this algorithm is not currently implemented in the hardware and plans for implementation are not clear | ||
| + | #* Timing of single events shows regions of similar timing and the pattern of timing is correlated with crates. | ||
| + | #* Problem is likely due to timing distribution to the crates | ||
| + | #* Pedestals: First look at overnight pedestal run shows some 3 hour structure (as for the BCAL) , but with much reduced amplitude (~0.6 channels) | ||
# BCAL | # BCAL | ||
| − | # | + | ## [https://logbooks.jlab.org/book/hdbcal HDBCAL log book] (Mark) |
| + | #* First look at pedestal stability in BCAL | ||
| + | #* ~3 hour period for baseline oscillations with detector powered on | ||
| + | #* Same structure seen in data (not yet entered into the log) for pedestals with the power off, but at a reduced amplitude | ||
| + | #* Oscillations seem to correlate with the temperatures in the crates, which vary by about 2 degF. [Note: temperature variations of the MPPC chillers has a period of about 20 min and voltages are very stable.] | ||
| + | #* Matt: Each Fcal base has a temperature sensor that could be used as a reference for temperature variations in the hall. They accessible through the CAN controller that has a network address to access data. | ||
| + | #* Changes in the pedestal when power is shut off to the MPPCs are about 20 counts. However, in one slot of one crate, they show variations of order 70-80 counts, which is likely not physical. | ||
# Reconstruction and Simulation | # Reconstruction and Simulation | ||
# TDR update | # TDR update | ||
# Calibration | # Calibration | ||
# Any other business | # Any other business | ||
Revision as of 13:57, 8 May 2014
Teleconference Time: 11:00 a.m. EST
- ESNET (Number is 8542553) and SeeVogh 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 757-269-6460 (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)
- BCAL: Check max ratings for MPPCs (Elton).
Tentative Agenda
- Announcements
- Collaboration Meeting May 12-14
- Action Items
- FCAL
- BCAL
- Reconstruction and Simulation
- TDR update
- Calibration
- Any other business
Minutes
Attendees: Manuel, Laura, Shayne, Will, Mark, Zisis, Elton, John L., David, Yi (JLab); Andrei, Teigan (UofR), Matt (IU).
- Announcements
- CEBAF delivered 10.5 GeV beam to the tagger dump last night!
- Collaboration Meeting May 12-14
- Action Items
- FCAL
- HDFCAL log book (John)
- Fcal detector continues to work with no known problems
- New firmware installed on Fadcs seems to have addressed all known problems with the Fadcs
- Log book entry shows timing of LED pulser run, with the timing determined by the IU "linear interpolation" method
- David: Note that the hardware this algorithm is not currently implemented in the hardware and plans for implementation are not clear
- Timing of single events shows regions of similar timing and the pattern of timing is correlated with crates.
- Problem is likely due to timing distribution to the crates
- Pedestals: First look at overnight pedestal run shows some 3 hour structure (as for the BCAL) , but with much reduced amplitude (~0.6 channels)
- BCAL
- HDBCAL log book (Mark)
- First look at pedestal stability in BCAL
- ~3 hour period for baseline oscillations with detector powered on
- Same structure seen in data (not yet entered into the log) for pedestals with the power off, but at a reduced amplitude
- Oscillations seem to correlate with the temperatures in the crates, which vary by about 2 degF. [Note: temperature variations of the MPPC chillers has a period of about 20 min and voltages are very stable.]
- Matt: Each Fcal base has a temperature sensor that could be used as a reference for temperature variations in the hall. They accessible through the CAN controller that has a network address to access data.
- Changes in the pedestal when power is shut off to the MPPCs are about 20 counts. However, in one slot of one crate, they show variations of order 70-80 counts, which is likely not physical.
- Reconstruction and Simulation
- TDR update
- Calibration
- Any other business
