Difference between revisions of "GlueX Start Counter Meeting, February 5, 2015"
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# Review [[GlueX Start Counter Meeting, January 29, 2015#Minutes|minutes from the January 29 meeting]] | # Review [[GlueX Start Counter Meeting, January 29, 2015#Minutes|minutes from the January 29 meeting]] | ||
# Calibration | # Calibration | ||
| + | ## [https://logbooks.jlab.org/entry/3318890 Track matching] | ||
# Plans for Spring run | # Plans for Spring run | ||
#* [[TOF DAQ Tasks, January 22, 2015|DAQ tasks for this run (TOF version)]] | #* [[TOF DAQ Tasks, January 22, 2015|DAQ tasks for this run (TOF version)]] | ||
| Line 22: | Line 23: | ||
==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/2015</code> on the JLab CUE. This directory is accessible from the web at https://halldweb.jlab.org/talks/2015/ . |
| + | |||
| + | =Minutes= | ||
| + | |||
| + | * '''FIU''': Werner Boeglin, Mahmoud Kamel | ||
| + | * '''JLab''': Mark Ito (chair), Eric Pooser, Simon Taylor, Beni Zihlmann | ||
| + | |||
| + | ==Start Counter Re-Installation== | ||
| + | |||
| + | * Next week we will get a new flange for the target cart to solve interference reported at the last meeting. Re-assembly can start then. | ||
| + | * There is a plan to attache a 1.5 mm plastic target to the nose of the start counter. It will be attached to the light-tighting tape in some manner or another. | ||
| + | * Tim Whitlatch's plan is to evaluate any tilt once the start counter is mounted on the target cart and then evaluate if any further adjustment is necessary. | ||
| + | |||
| + | ==Matching with Charged Tracks, Etc.== | ||
| + | |||
| + | Simon led us through his recent [https://logbooks.jlab.org/entry/3318890 log book entry]. | ||
| + | |||
| + | * There appears to be some sort of cabling or translation transposition in two places in the start counter. The azimuthal difference between the center of a counter and the intersection point of a charged track shows anomalies for counters 1 and 2 and for counters 22 and 23. | ||
| + | * He has rotated the start counter in the geometry. This turns out to be a somewhat tedious exercise; it is not simply a rotation of a single solid body. The tilt is visible in the r-z distribution of intersection points that he showed. | ||
| + | * The "fuzziness" noted last time in the nose region was due to an overly wide azimuthal matching cut. Improvement is marked. The more reasonable value has been checked into the commissioning branch. | ||
| + | |||
| + | ==Basic Signal Assessment== | ||
| + | |||
| + | We had some discussion on understanding and controlling our thresholds, both for the FADCs and TDCs. | ||
Latest revision as of 23:03, 31 March 2015
GlueX Start Counter Meeting
Thursday, February 5, 2015
10:00 am EST
CEBAF Center F326/327
Contents
Agenda
- Announcements
- Review minutes from the January 29 meeting
- Calibration
- Plans for Spring run
- Action Item Review
Communication
BlueJeans
- The BlueJeans Meeting ID is 556 286 544 .
- Connect to the Meeting
Slides
Talks can be deposited in the directory /group/halld/www/halldweb/html/talks/2015 on the JLab CUE. This directory is accessible from the web at https://halldweb.jlab.org/talks/2015/ .
Minutes
- FIU: Werner Boeglin, Mahmoud Kamel
- JLab: Mark Ito (chair), Eric Pooser, Simon Taylor, Beni Zihlmann
Start Counter Re-Installation
- Next week we will get a new flange for the target cart to solve interference reported at the last meeting. Re-assembly can start then.
- There is a plan to attache a 1.5 mm plastic target to the nose of the start counter. It will be attached to the light-tighting tape in some manner or another.
- Tim Whitlatch's plan is to evaluate any tilt once the start counter is mounted on the target cart and then evaluate if any further adjustment is necessary.
Matching with Charged Tracks, Etc.
Simon led us through his recent log book entry.
- There appears to be some sort of cabling or translation transposition in two places in the start counter. The azimuthal difference between the center of a counter and the intersection point of a charged track shows anomalies for counters 1 and 2 and for counters 22 and 23.
- He has rotated the start counter in the geometry. This turns out to be a somewhat tedious exercise; it is not simply a rotation of a single solid body. The tilt is visible in the r-z distribution of intersection points that he showed.
- The "fuzziness" noted last time in the nose region was due to an overly wide azimuthal matching cut. Improvement is marked. The more reasonable value has been checked into the commissioning branch.
Basic Signal Assessment
We had some discussion on understanding and controlling our thresholds, both for the FADCs and TDCs.
