[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: fcal radiation hardness
On Mon, 6 Aug 2007, Matthew Shepherd wrote:
Hi Hi,
but I really think we need a concept before we can discuss a realisation
with Tim. I also think we should revisit the impact once more critical. We
had lately quite some suprises in the design of the detector.
cheers elke
> Date: Mon, 6 Aug 2007 08:34:19 -0400
> From: Matthew Shepherd <mashephe@indiana.edu>
> To: Elke-Caroline Aschenauer <elke@jlab.org>
> Cc: halld-cal@jlab.org, Timothy Whitlatch <whitey@jlab.org>
> Subject: Re: fcal radiation hardness
>
>
> Hi Elke,
>
> Yes, this is something we talked about with Tim, but did not bring up
> in the workshop. It is on our list of things to try to understand.
>
> -Matt
>
> On Aug 6, 2007, at 2:44 AM, Elke-Caroline Aschenauer wrote:
>
> >
> > Dear Matt and Beni,
> >
> > I think we overlooked an important point during the calorimeter
> > meeting
> > what needs to be finalized for a review.
> > I think we need a clear plan how to deal wit the radiation hardness
> > problem of the inner block of the fcal.
> >
> > We can either develop an insitu cure for the radiation damage of the
> > blocks. UV-light only cures part of the problem and insitu heating
> > seems
> > not really practically. The other option would be to use radiation
> > hard
> > blocks, if we don't find the money to buy them maybe we can find
> > blocks
> > somewhere. Like CMS spare blocks or fermi or ....
> >
> > I think we need a strategy to attack this problem. I think it would
> > also
> > be good to look again how long we can run till we see really damage
> > and
> > light losses.
> >
> > bye elke
> >
> >
> >
> > ( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
> > ) `\ -
> > / '. | +
> > | `, Elke-Caroline Aschenauer =
> > \,_ `-/ -
> > ,&&&&&V Jefferson Lab +
> > ,&&&&&&&&: HALL-D 12C / F381 121-A Atlantic Avenue =
> > ,&&&&&&&&&&; Mailstop: 12H5 Hampton, VA 23664 -
> > | |&&&&&&&;\ 12000 Jefferson Ave +
> > | | :_) _ Newport News, VA 23606 Tel.: 001-757-224-1216 =
> > | | ;--' | Mail: elke@jlab.org Mobil: 001-757-256-5224 -
> > '--' `-.--. | +
> > _ | |---' Tel.: 001-757-269-5352 =
> > `-.___/ Fax.:
> > 001-757-269-6248 -
> > +=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-
> > +=-+=-+
> >
>
>
( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
) `\ -
/ '. | +
| `, Elke-Caroline Aschenauer =
\,_ `-/ -
,&&&&&V Jefferson Lab +
,&&&&&&&&: HALL-D 12C / F381 121-A Atlantic Avenue =
,&&&&&&&&&&; Mailstop: 12H5 Hampton, VA 23664 -
| |&&&&&&&;\ 12000 Jefferson Ave +
| | :_) _ Newport News, VA 23606 Tel.: 001-757-224-1216 =
| | ;--' | Mail: elke@jlab.org Mobil: 001-757-256-5224 -
'--' `-.--. | +
\_ | |---' Tel.: 001-757-269-5352 =
`-._\__/ Fax.: 001-757-269-6248 -
+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+