[Solid_ec] MAPMT summary

[Alexandre Camsonne]

Hi,

I think we might need amplified base so one can run at lower gain to
prevent premature aging of the PMT.
After we could use their kind of VFE and FE, or send everything into FADCs.

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.

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.

When is you meeting by the way ?

Alexandre


On Mon, Apr 8, 2013 at 10:05 AM, Zhiwen Zhao <zwzhao at jlab.org> wrote:

> Dear All
>
> If we need the VFE and FE cards, can LHCb cards be used directly?
> If so, maybe we can buy from LHCb and do some test to verify it?
> Assume our total channels for readout is about 2000, we only need about 32
> of these boards to work.
>
> Zhiwen
>
>
> On 4/7/2013 10:21 AM, Xiaochao Zheng wrote:
>
>> Dear All:
>>
>> Todd and Wouter finished a writeup on the multi-node PMT used by LHCb
>> (Thanks!). Please see attached.
>>
>> 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.
>>
>> Thanks,
>>
>> Xiaochao
>>
>>
>>
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