[Halld-cal] posted a GlueX doc to compare JLab and UTFSM SiPM measurements

[George Lolos]

Hi Elton,

This is a good idea.  The Regina group has also published our own results and, given the different methodology, the comparison will be enriched.

Cheers,

George

Sent from my iPad

> On Jan 19, 2016, at 22:52, Elton Smith <elton at jlab.org> wrote:
> 
> Dear colleagues,
> 
> In preparation for writing a NIM article on the BCAL, I have tried to summarize the test results of the SiPMs. To my knowledge, we have not done this systematically before.
> I have posted GlueX-doc-2910, which compares the measurements of SiPMs by JLab and UTFSM. See
> http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=2910
> 
> Major conclusions of this study are
> o measurements are generally consistent, but differences between various quantities are discussed
> o entries of the UTFSM data into the JLab halld_sipm database are tagged as being at an over-bias of 1.2 V, but they are consistent with the NIM paper data at 0.9 V.
> o dark rates reported in the UTFSM NIM paper are internally inconsistent and only one seems to be in line with JLab results.
> 
> Comments and feedback are welcome.
> 
> Cheers, Elton.
> 
> -- 
> Elton Smith
> Jefferson Lab MS 12H3
> 12000 Jefferson Ave STE 4
> Newport News, VA 23606
> (757)269-7625
> (757)269-6331 fax
> 
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