[Tpe] Tpe Calorimeter

[Larry Weinstein]

Dear Mauri,

We will calibrate the calorimeter with three methods:
  1) cosmics at vertical incidence should deposit 60 MeV of energy in 
the 30 cm of scintillator.  Since the sampling fraction of the 
calorimeter is about 1/6 or 1/7 (2:1 scintillator to Pb) this 
corresponds to 450 MeV shower energy
  2) the lowest energy beam leptons should be about 500 MeV.  We will 
measure that cutoff in CLAS and see that in the calorimeter.  We can 
increase this by increasing the chicane fields.
  3) With the lepton blocker half-in, the lowest lepton energy should be 
about 2.5 or 3 GeV.  We will measure that cutoff in CLAS and see that in 
the calorimeter. Again, we can vary this by changing the chicane fields.

I would like to take enough vertical incidence cosmic data to 
approximately gain-match the PMTs.

- Larry

Maurizio Ungaro wrote:
> Dear Larry,
>
> how do you think we can calibrate the calorimeter?
> Maybe using cosmics?
>
> regards,
> mauri
>
>
> On Oct 14, 2010, at 5:22 PM, Larry Weinstein wrote:
>
>    
>> Dear Stepan,
>>
>> We would like to bring the TPE calorimeter to JLab during the week of the 25th so we can hook it up to the JLab electronics so that Mauri can develop the DAQ code for it.  Will this possible?  If so, what do we need to do to make it happen?
>>
>> -- 
>> 				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/
>>      
>    

-- 
				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/