[Halld-pid] Start counter progress

[Beni Zihlmann]

Hi All,
the email below never got through because the attached file is too big 
for the mailing list.
So I resend this email, this time giving you a link to the file with the 
siPM specs.
https://halldweb.jlab.org/wiki/index.php/Start_Counter_Silicon_Photomultiplier_Read-Out
see "File:SiPMspecs.xlsx"

also subscribed to "halld-pid at jlab.org" if you are not already.

cheers,
Beni


On 9/20/23 12:04, Beni Zihlmann wrote:
> Hi All,
> If you are not yet subscribed to "halld-pid at jlab.org" please do so. I 
> would like to
> use this mailing list again for Start Counter business.
>
> I did add some more information to the wiki page regarding the start 
> counter
> performance over the years:
>
>  https://halldweb.jlab.org/wiki/index.php/Start_Counter_Operations#Start_Counter_Response 
>
>
> as you can see there is a clear degradation of the response. I guess 
> it is gain loss which we
> may recover from by increasing the bias voltage. I received a spread 
> sheet with the break
> down voltages for each sensor from Fernando (see attached). Note that 
> spread sheet includes
> all SiPMs for PS and Tagger microscope as well.
>
> We have to find out which SiPM sensors are used for which paddle to 
> make sure we keep
> track of the break down voltage to be the same for all paddles with 
> respect to the quoted Vop.
>
>
> cheers,
> Beni