[Rich] Note on H8500 average dark current

[Marco Mirazita]

This was the width of the maroc input trigger signal.


On Mon, 15 Apr 2013, Matthias Hoek wrote:

> Hi Marco,
> That is true if you base the total noise rate on an individual MAPMT's noise rate. However, if you assume the noise to be uncorrelated then you have a much higher noise rate (because you have 28 MAPMTs). Then a 15ns window would be sufficient, so the truth must be in between.
> How do you get the 100ns time window for the DAQ?
>
> Cheers,
>
> 	Matthias
>
> -----Original Message-----
> From: mirazita [mailto:Marco.Mirazita at lnf.infn.it]
> Sent: 15 April 2013 12:39
> To: Matthias Hoek
> Cc: rich at jlab.org
> Subject: Re: [Rich] Note on H8500 average dark current
>
> Hi Matthias,
> as far as I remember, the time window of our daq was 100 ns, so a factor of 3 smaller then what you calculated.
> Marco
>
>
>
> On Sun, 14 Apr 2013 21:50:05 +0100, Matthias Hoek <Matthias.Hoek at glasgow.ac.uk> wrote:
>> Hi,
>> I mentioned a brief note concerning the H8500 average dark current
>> properties during our last phone meeting. Please find this note
> attached. I
>> hope you find it useful.
>>
>> Cheers,
>>
>>                 Matthias
>>
>> ---
>>
>> Dr Matthias Hoek
>>
>> University of Glasgow
>> School of Physics & Astronomy
>> Rm 505
>> Kelvin Building
>> Glasgow G12 8QQ
>> Scotland
>>
>> Tel: +44 141 330 2774
>> Fax: +44 141 330 5299
>>
>> The University of Glasgow, charity number SC004401
>
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