[Tpe] Calorimeter status

[Larry Weinstein]

Dear Folks,

We have now installed 18 of the 30 PMT/Base combinations.  One of the 
bases will need to be replaced because it does not hold HV.  All bases 
have been checked to determine if they supply the correct voltages.  
Three bases (not installed) did not supply the correct voltages and will 
be returned to the manufacturer.  Fortunately, USM sent several spare 
bases so we do not need to repair any of the bad bases (yet).

We are currently taking data with 17 modules with an external trigger.  
The goal is to gain match the tubes before installation in the hall.  
The twelve channels installed yesterday all look fine.

We will finish instrumenting the detector tomorrow and begin DAQ with 24 
channels at a time (the limit of our HV channels).  We plan to measure 
cosmics in both horizontal and vertical orientations.  Four overnight 
runs will let us measure all channels in both orientations.

Doug Tilles looked at the detector today and marveled at how tiny it 
is.  He is confident that it will be easy to install.

-- 
				Sincerely,
				Larry

-----------------------------------------------------------
Lawrence Weinstein
University Professor
Physics Department
Old Dominion University
Norfolk, VA 23529
757 683 5803
757 683 3038 (fax)
weinstein at odu.edu
http://www.lions.odu.edu/~lweinste/