Re: Tagger interface drawing (fwd)

[Elton Smith <elton@jlab.org>]

Hi Jay,

I believe the reason the quadrupole was paired with the tagging magnet was
because it was thought that these needed to be designed as a unit to
optimize the optics. But using a standard Jlab design makes sense if it
can satisfy our requirements.

Yang: Perhaps you should get more information about the so called QP and
see if this matches the required optics.

Cheers, Elton.






Elton Smith
Jefferson Lab MS 12H5
12000 Jefferson Ave
Suite # 16
Newport News, VA 23606
elton@jlab.org
(757) 269-7625

On Fri, 11 Jan 2008, Jay Benesch wrote:

> Parts commonality.  Why have a unique quad in front of the tagger when
> the QP will serve?
>
> As for the larger QP bore, it would reduce halo if one could use 38 mm
> OD, 34 mm ID tube in the QPs throughout arc 10 and hall D instead of
> 1.375" OD, 1.25" ID tube.   Recall that CASA design work was done
> assuming the QP was 1.625" bore with 1.5" beam pipe.  I'm still pushing
> to move the poles out a bit to cut down on multipoles.
>
> Jay
>