From:	KEKUX::"spieler@Csa6.LBL.Gov" "Helmuth Spieler" 27-SEP-1996 09:05:37.26
To:	unno@kekvax.kek.jp
CC:	
Subj:	thermal history of ATT4

Nobu,
Here is the thermal history of ATT4 as you requested at CERN.
Typically, it takes 1 hr for a module to warm up to room temperature,
which was usually 22 deg. C. When the module is powered up, the
detector temperature is somewhat higher, but not more than a few
degrees. I haven't entered the exact history into the calculation of
Neff. Perhaps I can manage tomorrow. In any event, I wanted to get
the information to you before I leave. I will be away from LBNL
throughout all of October and will not be able to check my email.
... Helmuth 
 
 
Thermal history of ATT4
 
ATT4 was kept on dry ice during shipment from Japan and 
during import processing at the customs broker. Upon 
arrival at LBNL it was immediately placed into the freezer 
at a temperature of about -15 deg. C.
 
25-Jan-96  10:00  remove ATT4 from freezer
           10:30  bring up to room temp by blowing with N2
                  module powered up, no readout.
           10:50  returned to freezer
           11:45  T= -5 deg C
           13:00  T= -13 deg C
 
29-Jan-96  15:00  remove ATT4 from freezer
           15:30  warmed up to 20 deg C
                  installed new HAC (glued at room temp)
           18:30  module powered up, corrupted readout.
           19:00  return to freezer
 
30-Jan-96  09:45  remove ATT4 from freezer
           10:15  room temp
                  module powered up abt. 50% of time
           20:00  return to freezer
 
31-Jan-96  10:15  remove ATT4 from freezer
                  module powered up abt. 50% of time
           22:00  return to freezer
 
1-Feb-96   09:30  remove ATT4 from freezer
           10:30  module powered up abt. 50% of time
                  installed second (new) hybrid on module
                  (glued at room temp) 
           19:00  resume elec. tests
           20:40  return to freezer
 
2-Feb-96   09:15  test module in freezer
           18:00  remove ATT4 from freezer
                  take home
           21:00  place ATT4 in freezer
 
3-Feb-96          keep module cold during flight to Japan
 
4-Feb-96   23:00  place module in freezer at KEK
 
                  see test beam log for further thermal history