August 28, 2013 tracking CDC/FDC

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Meeting Time and Place

Wednesday August 28, 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. FDC Update
  3. CDC Update
  4. Data Formats

Minutes

Present: Curtis, Naomi, Lubomir, Mark Dalton, Cody

  1. FDC Update
    1. We started testing the FDC with HV. Bill has the new design of the mesh support using 4 rails instead of 8 on the installation carts and BCAL. We are also working on the skin that supports the cables between the packages.
    2. We are testing now the spare package. For the top two cells with we had to use 20usec window for the fADC125. The readout was OK, but the event builder was crushing. Beni, Elliot and others found a bug in CODA that shows up in case of a big event size.
  2. CDC Update
HVB mounts
HVB mounts
HVB mounts
    1. Gary machined the HV distribution block support brackets in the form of several pieces which fit together to form a ring and mount on the standoffs from the Al endplate. They are shown in the photos behind the original cooling ring. There are insulating barriers (teflon washers and nylon bolts) at approximately 2 and 8 o'clock to prevent eddy currents. There are extra holes in the pieces to provide a place to tie cables if necessary.
    2. Amy has been preparing 2 more large scintillator paddles as possible replacements in case something unfortunate should happen to the others.
    3. Naomi had some trouble with concatenating CODA files due to earlier data filling the space between the last event data and the end of the file; this can be fixed in the decoding code.
  2. FPGA Update
    1. Cody described that following some discussion with Hai Dong (fa250 firmware architect) the timing algorithm would be more easily implemented using state machines in the front-end, he will provide more details later. He has not tackled the upsampling yet but is optimistic that it should also run in the front-end.
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