GlueX TOF Meeting, October 4, 2016

From GlueXWiki
Jump to: navigation, search

GlueX Time-of-Flight Meeting
Tuesday, October 4
11:00 am EDT
JLab: CEBAF Center, Room F326/327

Agenda

  1. Announcements
  2. Review of minutes from the previous meeting
  3. HV Scan Plan (Beni)

Communication

Slides

Talks can be deposited in the directory /group/halld/www/halldweb/html/talks/2016 on the JLab CUE. This directory is accessible from the web at https://halldweb.jlab.org/talks/2016/ .

Minutes

Present:

  • FSU: Sasha Ostrovidov
  • JLab: Thomas Britton, Eugene Chudakov, Mark Ito (chair), Simon Taylor, Beni Zihlmann

There is a recording of this meeting on the BlueJeans site.

TOF HV scan Fall 2016

Beni presented his plan.

Prerequisites

  • a) base line adjusted to 100 ADC counts
  • b) all discriminator thresholds at about 10 mV above base line
  • c) readout window optimized for ADC with first pulse at least 10 samples after window start, window width 160ns (40 samples)
  • d) NSA 25 samples
  • e) NSB 3 samples
  • f) CAEN tdc readout window 200ns and timing peak in center.

Data Taking List

  1. set all HV to NOMINAL=1200V (>25 M triggers, ~25 files)
  2. set all HV -25V of NOMINAL (>25 M triggers)
  3. set all HV +25V of NOMINAL (>25 M triggers)
  4. set all HV -50V of NOMINAL (>25 M triggers)
  5. set all HV +50V of NOMINAL (>25 M triggers)
  6. set all HV -75V of NOMINAL (>25 M triggers)
  7. set all HV -100V of NOMINAL (>25 M triggers)
  8. set all HV -125V of NOMINAL (>25 M triggers)

We thought that we should add a few voltage settings above NOMINAL in addition to those listed above.

Review of minutes from the previous meeting

We looked at the minutes from September 20.

Mark will arrange a meeting with Vladimir Popov next week to discuss PMT bases with amplification.

Retrieved from "https://halldweb.jlab.org/wiki/index.php?title=GlueX_TOF_Meeting,_October_4,_2016&oldid=77962"