Time-of-Flight/Start-Counter/Target Meeting, November 13, 2009

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Location, Time

Friday, October 16, 2009
1:30 pm EDT
JLab: CEBAF Center, Room F326/7
ESNet: 8542553
Conference Group: 800-377-8846, participant code: 77438230
Slides: talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2009-10 on the JLab CUE (you have to be a member of the "halld" group). This directory is accessible from the web at https://halldweb1.jlab.org/talks/2009-10/ .


  1. Minutes from the last meeting
  2. Time-of-Flight Status
  3. Start Counter Status
  4. Action Items


FSU: Sasha Ostrovidov
JLab: Eugene Chudakov, Mark Ito (chair), Elton Smith, Simon Taylor, Tim Whitlatch, Beni Zihlmann

Time-of-Flight Status

Sasha reports that he has continued to work with the Phillips 715 constant fraction discriminator. He is using a 10 cm cable for the delay. Currently he is having problems with cross-talk; signals in one channel produce signals in a neighboring channel. This is giving spurious peaks in his timing spectra. These tests have been done with a pulser. Nonetheless he is getting about 150 ps timing resolution from the TOF prototype with this discriminator.

Beni suggested trying a 4 ns delay cable.