[Halld-cal] mailing list, fits, linearity of gain

[hayk.hakobyan at usm.cl]

Hi Elton, Thanks!

So this is a test message as well.

Hayk.



Quoting Elton Smith <elton at jlab.org>:

> Hi Hayk,
>
> You should now be able to post to the halld-cal. I was out of town  
> earlier this week visiting my parents, so I just got to it.
>
> Thanks, Elton.
>
> Elton Smith
> Jefferson Lab MS 12H5
> 12000 Jefferson Ave
> Suite #16
> Newport News, VA 23606
> (757) 269-7625
> (757) 269-6331 fax
>
>
> On 1/30/12 12:30 PM, hayk.hakobyan at usm.cl wrote:
>>
>> Dear Elton and All,
>>
>> I'm trying to join to the hall D calorimeter mailing list using the  
>> following link:
>> https://halldweb1.jlab.org/wiki/index.php/Jan_24,_2012_Readout#Minutes
>> but it looks it doesn't work for me. Could you please add me to the  
>> mailing list?
>>
>> I've also located a file with fits for all 16 cells of MPPC number  
>> 90 with measurements done in different 10 voltages from Stage 3 on  
>> JLab computers here:
>> /scratch/hayk/gaussian_fit_MPPC_90.root
>> (please access to the file from jlabl1, ifarml64 recently acts  
>> strangely for many jlab accounts).
>>
>> As well as I attach to the email files with the study of the MPPC  
>> signal linearity (for MPPC numbers 90 and 62). The first column  
>> corresponds to the MPPC number; the second - MPPC cell number; the  
>> third to the voltage; the forth - the number of channels between  
>> pedestal and 1 photo-electron peak; the fifth - the number of  
>> channels between 1 photo-electron peak and 2 photo-electron peak;  
>> the sixth - the number of channels between 2 photo-electron peak  
>> and 3 photo-electron peak. So one can conclude that the signals are  
>> pretty linear. The results are similar for other MPPCs as well. (If  
>> the gain is zero that means that 3 photo-electron peak is very  
>> insignificant so we can't calculate gain for that case.)
>>
>> Please feel free to let me know if you have any questions.
>>
>> Thanks,
>> Hayk.
>>
>>
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>>
>



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