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-------- Original Message --------
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Subject:
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<td>RE: Question about rating of our MPPCs</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Date: </th>
<td>Mon, 12 May 2014 14:23:11 +0000</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">From: </th>
<td>Ardavan Ghassemi <a class="moz-txt-link-rfc2396E" href="mailto:AGhassemi@hamamatsu.com"><AGhassemi@hamamatsu.com></a></td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">To: </th>
<td>Elton Smith <a class="moz-txt-link-rfc2396E" href="mailto:elton@jlab.org"><elton@jlab.org></a></td>
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<pre>Hi Elton,
Hamamatsu Japan commented that current is the main safety factor. They recommended that peak current drawn from the power supply be kept below 1mA per channel.
Best Regards,
Ardavan Ghassemi
Technical Sales Rep for Scientific Projects
On 5/8/14 4:08 PM, Ardavan Ghassemi wrote:
> Hi Elton,
>
> 120V won't damage the MPPC device itself but could damage its wire-bonding. Since all MPPC pixels are in parallel, equivalent resistance of their quenching resistors becomes quite low and could draw too much current from a 120V source.
>
> I'll discuss this with Hamamatsu Japan and see how much max. current the wire-bond can withstand and what bias voltage that would correspond to.
>
>
> Best Regards,
>
> Ardavan Ghassemi
> Technical Sales Rep for Scientific Projects
>
> Hamamatsu Photonics USA
> Phone: 908-252-7632
> <a class="moz-txt-link-freetext" href="http://www.hamamatsu.com">http://www.hamamatsu.com</a>
>
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