<div dir="ltr">Hi,<div><br></div><div>I think we might need amplified base so one can run at lower gain to prevent premature aging of the PMT. </div><div>After we could use their kind of VFE and FE, or send everything into FADCs.</div>
<div><br></div><div>The signal might need to be shaped a bit since it seems to be about 50 ns we might need to integrate it a bit, though cable length might make it wider already. If we have everything in FADC I think we can do the gain correction pretty quickly and include it in L1.<br>
<br></div><div>If we reuse the LHCb front end, I think we can put the discrimated signals in L1. If the digital trigger is slow we might need to have in L3 though we have 4 us to make the L1 so it might be ok.<br><br></div>
<div>When is you meeting by the way ?<br><br>Alexandre<br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Apr 8, 2013 at 10:05 AM, Zhiwen Zhao <<a href="mailto:zwzhao@jlab.org">zwzhao@jlab.org</a>> wrote:<br>
<blockquote class="gmail_quote">Dear All<br>
<br>
If we need the VFE and FE cards, can LHCb cards be used directly?<br>
If so, maybe we can buy from LHCb and do some test to verify it?<br>
Assume our total channels for readout is about 2000, we only need about 32 of these boards to work.<br>
<br>
Zhiwen<div><div class="h5"><br>
<br>
On 4/7/2013 10:21 AM, Xiaochao Zheng wrote:<br>
</div></div><blockquote class="gmail_quote"><div><div class="h5">
Dear All:<br>
<br>
Todd and Wouter finished a writeup on the multi-node PMT used by LHCb (Thanks!). Please see attached.<br>
<br>
Please read the document carefully so that we can discuss about it at the Tuesday meeting. I am copying this to the DAQ people (Yi and Alex) so that they can contribute their expertise.<br>
<br>
Thanks,<br>
<br>
Xiaochao<br>
<br>
<br>
<br></div></div>
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