[Halld-tagger] [EXTERNAL] beamline meeting on Monday cancelled

[Alexander Somov]

Hi Michael,

Ok, let's leave the window size as is.

We'll do a few more tests in the new year.

Cheers,
            Sasha
________________________________
From: Michael Dugger <dugger at jlab.org>
Sent: Friday, December 20, 2019 6:30 PM
To: Alexander Somov <somov at jlab.org>
Cc: Richard Jones <richard.t.jones at uconn.edu>; Hall D beam working group <halld-tagger at jlab.org>
Subject: Re: [Halld-tagger] [EXTERNAL] beamline meeting on Monday cancelled

Sasha,

I want to keep the window to 150 samples. When we had 100 samples in the
window it was difficult to get a plateau region that was large enough for
the out-of-time subtraction.

It is very good news that the rates will be manageable :)

Take care,
Michael


> Hello Richard and All,
>
> The easiest solution for the TPOL is to scale the read out, i.e.,
> to use 4 fadcs instead of 2 (I've already installed these fadcs
> some time ago, but they are currently not used). This should reduce
> the dead time by a factor of two.
>
> Another thing which we need to discuss with Mike is whether we
> can decrease the TPOL window size to 100 samples (400 ns). Currently,
> the window size is 150 samples.
>
> At any rate, the TPOL seems not to be a showstopper.
>
> Happy holidays !
>
> Cheers,
>             Sasha
>
>
>
>
>
>
>
> ________________________________
> From: Halld-tagger <halld-tagger-bounces at jlab.org> on behalf of Richard
> Jones <richard.t.jones at uconn.edu>
> Sent: Friday, December 20, 2019 11:43 AM
> To: Hall D beam working group <halld-tagger at jlab.org>
> Subject: [Halld-tagger] [EXTERNAL] beamline meeting on Monday cancelled
>
> Hello Beamers,
>
> In view of the end of the run, and that in the end none of the planned
> work related to the beam got done, I propose that we skip Monday's
> meeting, and wait until after the new year to meet again. Issues related
> to beamline hardware that have been discussed over the past couple of
> weeks include
>
>   *   ability to run hysteresis loop on the PS magnet
>   *   ability to read out the TPOL at high rate, decreasing the width of
> the readout window
>
> On issue #1, I don't see how our group can contribute much, this is a
> magnet power supply and cooling problem. I assume this is in good hands.
> On issue #2, I would like to ask if Michael and Sasha can hammer out an
> agreement on this between them, and get back telling us what they have
> decided. If there are other things to discuss before the new year, please
> raise them on this list by email.
>
> Happy holidays to everyone!
> -Richard Jones
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> Halld-tagger at jlab.org
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