Time-of-Flight/Start-Counter Meeting, July 24, 2009

Minutes

   FSU: Sasha Ostrovidov
   JLab: Mark Ito, Simon Taylor, Tim Whitlatch

Time-of-Flight Prototype Work

   Sasha  showed plots from tests at FSU on the TOF prototype done by him
   and  Chuck  Bryant,  their  undergraduate  student.  They were using a
   XP2020  12-stage  PMT's, a CAEN constant-fraction discriminator and an
   F1  TDC. They tried two different trigger counters, one 4 cm wide, the
   other  1 cm  wide.  With  the narrow trigger counter they were able to
   achieve  a  resolution of about 150 ps on the time difference from the
   two ends of the counter.

   The next step is to go on the the Hamamatsu PMT's.

Start Counter Drawings

   Tim  pointed  us  to [16]drawings that Chuck Hutton made (PPTX) of the
   target  region  including the start counters. Two versions were shown;
   the  latest  one  shows  a  possible  geometry  where less material is
   presented to forward going particles.

Retrieved from http://www.jlab.org/Hall-D/software/wiki/index.php/Time-of-Flight/Start-Counter_Meeting%2C_July_24%2C_2009

References

  16. http://www.jlab.org/~huttonc/SC%20CONE%20DETAIL.pptx