[Bteam] Fwd: Re: injector beam studies

[Jay Benesch]

A contender for Thursday.

-------- Original Message --------
Subject: Re: injector beam studies
Date: Tue, 26 Oct 2010 12:57:37 -0400
From: Mark Pitt <pitt at vt.edu>
To: Kent Paschke <kdp2c at virginia.edu>, Jay Benesch <benesch at jlab.org>
CC: Dalton Mark <dalton at jlab.org>, BUDDHINI WAIDYAWANSA 
<buddhini at jlab.org>,        solvigno at jlab.org


Hi Jay,

Kent Paschke's crew has requested time at some point to work on the
injector setup that is needed for Qweak.  As you know, this is
invasive.  My understanding is that it can occur during the allocated
beam studies periods.  I'm no longer RC after tomorrow, but I'm passing
this request along to you and the next Hall C RC for scheduling during
some upcoming beam studies period in the near future.

Thanks,
Mark

Kent Paschke wrote:
> Hi Mark,
>
> A request: we eventually need more time in the injector, at least,
> before we get into any kind of "production" mode.  No absolute need to
> do it this week, but if we do it now we can maybe knock some things
> out that we would have to do later (like, when Qweak is really ready
> to run) and also we could get some data points on the source before
> the system gets further from where we set it up (more than a month ago).
>
> 1) Injector studies.  In part, this is to tie off previously
> uncompleted details, and also the check on the effect of hardware
> changes made since our setup (laser replacement and cathode
> reactivation).
>     - 6 hours for HWP studies and translation studies.
>     - 2 hours for Pockels cell off studies. (I believe that all of
> these are covered by our existing Atlis).
> 2) we also need to check the Pockels cell switching.  I've lost track
> about whether this can be done remotely, yet.  If not, it requires a
> 30 minute - 1 hour access to the injector, with help from John
> Hanknecht.  If it can be done remotely, it requires at least 1 hour
> invasive study (since we haven't performed the procedure remotely
> before, it should be faster once we get practiced).
>
> If you have questions, email me or talk to Mark Dalton locally.
>
> Cheers,
> Kent
>