Difference between revisions of "May 22, 2013 Tracking CDC/FDC"

From GlueXWiki
Jump to: navigation, search
(→‎Minutes)
(→‎Minutes)
Line 26: Line 26:
 
#FDC Update
 
#FDC Update
 
#CDC Update
 
#CDC Update
−
#HV - all the straws have been up to 2200V; at 2200V they all drew less than 8uA shared between 3 HVBs (most drew much less).  We have found signals on every wire and have pedestal measurements for every wire.  For almost all of these, the pedestal width is 15-20 channels (max 4096) and the HVBs draw less than 0.08uA current shared between 3 boards at 2100V. There are 7 straws, each on a different transition board, with pedestal width larger than 20 channels (between 24 and 50).  Using these transition boards the HVBs draw less than 8uA (the trip setting) at 2200V shared (perhaps unevenly) between 4 boards.  We think that the noisy pedestal may be associated with dust burning off the wires because the current and the pedestal width both fall with time.  We hope to be able to use any 4 boards at 2100V and less than 0.08uA eventually.
+
##HV - All the straws have been up to 2200V; at 2200V they all drew less than 8uA shared between 3 HVBs (most drew much less).  We have found signals on every wire and have pedestal measurements for every wire.  For almost all of these, the pedestal width is 15-20 channels (max 4096) and the HVBs draw less than 0.08uA current shared between 3 boards at 2100V. There are 7 straws, each on a different transition board, with pedestal width larger than 20 channels (between 24 and 50).  Using these transition boards the HVBs draw less than 8uA (the trip setting) at 2200V shared (perhaps unevenly) between 4 boards.  We think that the noisy pedestal may be associated with dust burning off the wires because the current and the pedestal width both fall with time.  We hope to be able to use any 4 boards at 2100V and less than 0.08uA eventually.

Revision as of 16:02, 22 May 2013

Meeting Time and Place

Wednesday May 22, 2013 at 11:00am At Jefferson Lab, the meeting will be held in F326

Connections

To connect from the outside, please use ESNET

  1. ) ESNET: 8542553
  2. )To connect by telephone, dial:
  • You can look up toll-free number at http://www.readytalk.com/intl
  • US and Canada: (866)740-1260 (toll free)
  • International: (303)248-0285 (toll call)
  • enter access code followed by the # sign: 3421244#

Hardware Agenda

  1. Announcement
  2. Collaboration Meeting
  3. FDC Update
  4. CDC Update straight straws early results

Minutes

Present: Naomi, Beni, Simon, Eugene, Lubomir, Mark

  1. Collaboration meeting
    • We do not need the 3rd timeslot.
  2. FDC Update
  3. CDC Update
    1. HV - All the straws have been up to 2200V; at 2200V they all drew less than 8uA shared between 3 HVBs (most drew much less). We have found signals on every wire and have pedestal measurements for every wire. For almost all of these, the pedestal width is 15-20 channels (max 4096) and the HVBs draw less than 0.08uA current shared between 3 boards at 2100V. There are 7 straws, each on a different transition board, with pedestal width larger than 20 channels (between 24 and 50). Using these transition boards the HVBs draw less than 8uA (the trip setting) at 2200V shared (perhaps unevenly) between 4 boards. We think that the noisy pedestal may be associated with dust burning off the wires because the current and the pedestal width both fall with time. We hope to be able to use any 4 boards at 2100V and less than 0.08uA eventually.
Retrieved from "https://halldweb.jlab.org/wiki/index.php?title=May_22,_2013_Tracking_CDC/FDC&oldid=47592"