Re: Estimates for Sipm cooling below room temperature (fwd)

[Elton Smith <elton@jlab.org>]

---------- Forwarded message ----------
Date: Fri, 27 Feb 2009 14:40:34 -0500 (EST)
From: serguei@jlab.org
To: Elton Smith <elton@jlab.org>
Subject: Re: Estimates for Sipm cooling below room temperature

             Elton,
I am glad that is useful.
There is something that disturbed me. It is 18.3±2.5mV/°C
changinbreakdownwvoltagege with temperature. We measured this value for
CPTA and HAMAMATSU devices and got about 40 mV/°C. I have few SiPM from
SemsL here
at CERN and is going check this.
I asked samples from Zacotek, and will meet Sadigov and get samples in
Dubna (Russia) in the middle of March.

Sergey.

>
> Hi Serguei,
>
> Thanks for the references. In particular the reference to
> http://arxiv.org/abs/0807.3220 has a lot of nice data on the 1x1 mm2 SensL
> devices. They also show data at fixed over-voltage which shows that the
> PDE does not have any intrinsic temperature dependence at fixed
> over-voltage. I have added extrapolations based on their measurements to
> my paper. It is nice to see that there is good consistency between this
> paper and Richard's measurements of the Photonique sensors, so likely
> conclusions based on these results can be trusted.
>
> GlueX-doc-1214 has been updated with the new information.
>
> As far ast the Zecotek MAPd-3 device, I am not convinced they satisfy our
> requirements, because it is not clear that they are quoting the PDE and
> dark rate at the same operating voltage. We need more details to make a
> adequate assessment.
>
> Thanks, Elton.
>
> Elton Smith
> Jefferson Lab MS 12H5
> 12000 Jefferson Ave
> Suite # 16
> Newport News, VA 23606
> elton@jlab.org
> (757) 269-7625
> (757) 269-6331 fax
>