Subject:
tracker data analysis meeting (26.10.05)
From:
William Burger <wjb@mail.cern.ch>
Date:
Sun, 30 Oct 2005 17:53:15 +0100 (CET)
To:
ams-tracker@cern.ch

A short summary of last week's meeting:

VA delays - We agreed that the k-side delay will
            be 1 us longer (~900 ns), with the
            values of 4 us and 5 us respectively
            for the p and n-sides (Eduardo's presentation).

TDR code - (1) Daniel and Claude indicated there
               will be a "toillettage" of the
               existing version "d'ici fin d'annee"
               and a new version for next year.
           (2) It was agreed to provide a "goto"
               in the case of high charge events where
               we wish to dump the raw data of
               an entire VA. It was also demanded to have
               some feedback based on existing data in
               order to assess the real utility of such
               a procedure (Paolo/Bill).
           (3) Paolo is producing an offline C(C++) code
               to mimic the TDR reduction code.
           (4) There was a demand by Daniel to finalize
               a list of channel flags to be set by the TDR
               calibration code. Philippe will investigate.
           (5) Bill has asked that the test beam calibration
               files used for the raw data analysis in view
               of the proton/helium publication be updated,
               notably increasing the statistics - currently
               only 128 events are used in the different loops.
               Notably, with a 3 sigma cut the non-gaussian
               results are meaningless ("renvoie au point 4")
           (6) Agnieska pointed out that due to the contigencies of
               the 2004 test beam, different checks of the
               data were removed and should be reinstalled.
         
      N.B. a good discussion of the TDR code took place.
  
charge determination - Paolo presented a likelihood analysis
                       of the October 2003 test beam data for
                       protons, helium and lithium

NIM paper - Bill presented test beam results extrapolated to 
            the ISS and indicated what he would like to do before
            the draft is circulated to the group (include in more 
            incisive manner the likelihood results of Paolo and present 
            the angle-resolution results for helium)

Noise(temperature) - Giovanni presented results from laboratory
                     measurements for the temperature dependence
                     of the calibration (number of high noise channels).
                     He was asked to do produce the results for the
                     noise. In particular, it would verify/disclaim
                     the assumption of a linear comportment of the noise
                     used to produce the projected resolution on the ISS.
                     At present, from the STS91 and June 2003 test beam 
                     data, it appear linear over the range of 8 to 32 C. 

GSI November test beam - Perugia readout system (Philippe) will be used 
                         for the GSI detectors in November. Martin will
                         investigate the possibility of a tracker test
                         beam at GSI in 2006, requested by the TDR code 
                         developers.

                                          

                                               Bill/Giovanni/Paolo

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