Difference between revisions of "GlueX TOF Meeting, April 15, 2011"
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# [[GlueX TOF Meeting, April 1, 2011#Minutes|Minutes from the last meeting]] | # [[GlueX TOF Meeting, April 1, 2011#Minutes|Minutes from the last meeting]] | ||
# Prototype Status [http://hadron.physics.fsu.edu/~ostrov/tof/20110415/] | # Prototype Status [http://hadron.physics.fsu.edu/~ostrov/tof/20110415/] | ||
| + | #* https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1719 | ||
# Contract Status | # Contract Status | ||
| − | #* [ | + | #* [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1713 Schedule] |
=Communication= | =Communication= | ||
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==Slides== | ==Slides== | ||
| − | Talks can be deposited in the directory <code>/group/halld/www/ | + | Talks can be deposited in the directory <code>/group/halld/www/halldweb/html/talks/2011-2Q</code> on the JLab CUE. This directory is accessible from the web at https://halldweb.jlab.org/talks/2011-2Q/ . |
| + | |||
| + | =Minutes= | ||
| + | |||
| + | Present: | ||
| + | |||
| + | * '''FSU''': Sasha Ostrovidov | ||
| + | * '''JLab''': Mark Ito (chair), Elton Smith, Simon Taylor, Tim Whitlatch | ||
| + | |||
| + | ==Minutes from the last meeting== | ||
| + | |||
| + | We went through the [[GlueX TOF Meeting, April 1, 2011#Minutes|minutes of the April 1 meeting]]. No significant comments were made. | ||
| + | |||
| + | ==Prototype Status== | ||
| + | |||
| + | Sasha reported on work with the TDC from CAEN. He described the procedure he used for calibration that ensures differential linearity for the least significant two bits. See [https://halldweb.jlab.org/talks/2011-2Q/Caen%20VX1290A%20TDC%20adjustment.html his slides] for details. He will see what effect that has on time resolution using the two long counters in the prototype. | ||
| + | |||
| + | ==Time-walk Calibration Using Crossed TOF Counters== | ||
| + | |||
| + | Elton described work documented in [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=1719 his recent note]. He introduced the subject by noting: | ||
| + | * the current proposal is to use leading-edge discriminators | ||
| + | * Athens uses an LED for their calibration system, which does not excite the scintillator for the TOF. | ||
| + | * GlueX has two planes of TOF, unlike CLAS where a laser system was used to give varying amplitude pulses. This gives a constraint: 4 time measurements from the two ends of crossed counters and 3 quantities to measure, x, y, and t. | ||
| + | |||
| + | See his note for details. The procedure outlined for time-walk corrections recovers the generated time resolution from the single particle events simulated. | ||
| + | |||
| + | ==Contract Status== | ||
| + | |||
| + | Mark reported that the APP has been signed. Now we need to move on to the Statement of Work and the Sole-Source Justification. | ||
Latest revision as of 17:12, 24 February 2017
Contents
Location, Time
Friday, April 15, 2011
2:00 pm EDT
JLab: CEBAF Center, Room F326
Agenda
- Announcements
- Minutes from the last meeting
- Prototype Status [1]
- Contract Status
Communication
Videoconference
- ESNet: 8542553
- EVO: EVO site
- direct meeting link
- Phone Bridge ID: 8 9450
Telephone
- dial:
- US and Canada: (866)740-1260 (toll free)
- International: (303)248-0285 (toll call) or look up toll-free number at http://www.readytalk.com/intl
- enter access code followed by the # sign: 3421244#
Slides
Talks can be deposited in the directory /group/halld/www/halldweb/html/talks/2011-2Q on the JLab CUE. This directory is accessible from the web at https://halldweb.jlab.org/talks/2011-2Q/ .
Minutes
Present:
- FSU: Sasha Ostrovidov
- JLab: Mark Ito (chair), Elton Smith, Simon Taylor, Tim Whitlatch
Minutes from the last meeting
We went through the minutes of the April 1 meeting. No significant comments were made.
Prototype Status
Sasha reported on work with the TDC from CAEN. He described the procedure he used for calibration that ensures differential linearity for the least significant two bits. See his slides for details. He will see what effect that has on time resolution using the two long counters in the prototype.
Time-walk Calibration Using Crossed TOF Counters
Elton described work documented in his recent note. He introduced the subject by noting:
- the current proposal is to use leading-edge discriminators
- Athens uses an LED for their calibration system, which does not excite the scintillator for the TOF.
- GlueX has two planes of TOF, unlike CLAS where a laser system was used to give varying amplitude pulses. This gives a constraint: 4 time measurements from the two ends of crossed counters and 3 quantities to measure, x, y, and t.
See his note for details. The procedure outlined for time-walk corrections recovers the generated time resolution from the single particle events simulated.
Contract Status
Mark reported that the APP has been signed. Now we need to move on to the Statement of Work and the Sole-Source Justification.
