Re: Power disipation of SiPM's (fwd)

[Elton Smith <elton@jlab.org>]

Hall D barrel calorimeter:


HI all,

I am forwarding this message to the halld-bcal mail list which was setup
to keep track of information of this type. We should get in the habit of
using it so that this information can be archived.

Cheers, Elton.



---------- Forwarded message ----------
Date: Tue, 27 Feb 2007 10:46:56 -0500 (EST)
From: Elton Smith <elton@jlab.org>
To: George Lolos <George.Lolos@uregina.ca>
Cc: Paul Smith <ptsmith@indiana.edu>, Elton Smith <elton@jlab.org>,
     Zisis Papandreou <Zisis.Papandreou@uregina.ca>
Subject: Re: Power disipation of SiPM's


Hi George,

Just to clarify the meaning of the numbers: I assume they refer to a
single channel. Therefore

1 ch of detector is 300 uW (negligible)
1 ch of electronics (room temp) = 60mW
1 ch of electronics (cooled -20deg?) = 600mW = 0.6 W

Since we are assuming the SiPMs will be cooled, we take the last number.
For 3072 ch of Bcal readout this gives 1.8KW. This is about 3-4 times the
power in the FDC preamps. Is this the correct way to understand these
numbers?

Thanks, Elton.

Elton Smith
Jefferson Lab MS 12H5
12000 Jefferson Ave
Suite # 16
Newport News, VA 23606
elton@jlab.org
(757) 269-7625

On Tue, 27 Feb 2007, George Lolos wrote:

> Hi Elton:
>
> Here's the feedback from SensL, with and without cooling.  I hope this
> answers your question?
>
> From Padraig:
>
> In answer to your question, the energy dissipation from the detector is
> minimal - 300uW based on a 30V bias with upto say 10uA current draw.
> This scales with number of detectors.
>
> For the electronics
> At room temp 6-7mA of current draw at 5V gives about 60mW
> Cooled this goes up by an order of magnitude.
>
>
> Cheers,
>
> George
>