[Primex] Status of the PrimEx-II preparation work

[Ashot Gasparian]

  The setup inspection and checkout work was continued
  in Hall B for the PrimEx-II run preparation this weekend
  (D. Dale, R. Pedroni, Pawel, Ashot).
  The current short status is:
  1) The optical contacts for the Pb-glass detectors are
     about in the same condition as it was originally.
     So, it is good. For the PbWO4 detectors, it is very
     hard to check without disconnecting the LMS fibers
     from the front. We checked few only, they are also
     looking good.
     Summary for the optical contact: it looks okay and
     do not require further work on this part.
     It is most likely a result of having the calorimeter
     in a controlled good environment for all these years.
  2) The quality of LMS optical fiber connections to the
     modules was inspected. About 20% of them need to repair.
     It has to be scheduled for July as one of the first things.
  3) HyCal was closed and the HV turned on. One out of five
     (the top) CAEN crates did not work. Needs further check.
     Signals from cosmic rays from the UVA120A sum modules
     were tested. It looks like all these modules are in a
     good shape (for two of them we did not see signal, but
     the typical noise was there. It could be a result of
     having not all HV turned on).
  4) Further check of the signals from all channels requires
     the cooling system operational.
     Pawel is working on that now with the help of engineering
     group.

  Ashot


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Ashot Gasparian                    Phone:(336)285-2112 (NC A&T)
Professor of Physics
Physics Department                       (757)-269-7914 JLab
NC A&T State University              Fax:(757)-269-6273 JLab
Greensboro, NC 27411               email: gasparan at jlab.org
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