[BDXlist] Catania measurements: Data vs MC comparison

[Elton Smith]

Hi Andrea, I agree with Marco, the comparison looks amazingly good (too 
good?). Especially I am impressed by the absolute normalization. I did 
not think that the cosmic-ray rates could be taken to be better than 
about 10%, unless variations due to longitude, etc were taken into 
account. (Are there seasonal/location variations?)

Thanks, Elton.

Elton Smith
Jefferson Lab MS 12H3
12000 Jefferson Ave STE 4
Newport News, VA 23606
(757)269-7625
(757)269-6331 fax

On 3/3/17 11:24 AM, Marco Battaglieri wrote:
> Dear Andrea,
> the comparison of the 16 channels of the calorimeter looks wonderful!!
> Whit this result in hands we can really think to write a paper about 
> the prototype  including the comparison withthe  MC.
> What about the 'old' crystal? do you have any results?
> Cheers
> Marco
>
> Andrea Celentano wrote:
>> Dear all,
>> just want to share with you the newest result from Catania Data vs MC 
>> comparison: the comparison has been made by selecting events with 
>> signals from 4 crystals in a column in the matrix above threshold (to 
>> select vertical cosmic rays): note that in data (blue) and mc (Red) 
>> histograms the scale is absolute (Hz/MeV), i.e. no "ad-hoc" 
>> normalization has been used.
>> Main issues that have been fixed in MC are:
>>
>> 1) Distribution of primary cosmic rays and their normalization - 
>> according to the proper definition of "flux" as "fluence differential 
>> wrt time"
>> 2) Spread induced in the charge collection due to the finite crystals 
>> attenuation length.
>>
>> I'll talk more about these results next Tuesday meeting, but I'd like 
>> to share this good result with you.
>>
>> Bests
>> Andrea
>>
>>
>>
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