Re: question to material in geometry

[Elke-Caroline Aschenauer <elke@jlab.org>]

On Mon, 21 Jan 2008, Richard Jones wrote:

Dear Richard,

thanks for the answer. I think the best would be to put the material Tim
is intending to put to support the lead glas blocks. Tim some rough
numbers please?

Thanks elke


> Date: Mon, 21 Jan 2008 11:14:37 -0500
> From: Richard Jones <richard.t.jones@uconn.edu>
> To: Elke-Caroline Aschenauer <elke@jlab.org>,
>      Matthew Shepherd <mashephe@indiana.edu>
> Cc: halld-mc@jlab.org
> Subject: Re: question to material in geometry
>
> Elke,
>
> There is currently no support material to hold the FCal blocks around
> the beam hole.  I propose to add an iron sleeve of  a new mm thickness.
> Matt, do you have a recommended thickness for that?
>
> Adding a helium bag down the beam line after the target is a good idea.
> I have it on my to-do list.
>
> Richard Jones
>
>
> Elke-Caroline Aschenauer wrote:
> > Dear Richard,
> >
> > I have a small question to the material in the geometry file.
> >
> > For the FCal beam hole do you have any material in there. Of course I mean not completely filled but some frame/tube is needed to support the blocks.
> >
> > One other question on the performance with the detector is if we would put a helium bag going from the end of the FDC through the empty cerenkov space to the tof, through the fcal to the photon beam dump.
> >
> > I can add this 2 items concerning geom-file on the wiki.
> >
> > cheers elke
> >
> >
> >
> >  ( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
> >   )    `\                                                  -
> >  /    '. |                                                  +
> >  |       `,              Elke-Caroline Aschenauer            =
> >   \,_  `-/                                                    -
> >   ,&&&&&V         Jefferson Lab                                +
> >  ,&&&&&&&&:       HALL-D 12C / F381       121-A Atlantic Avenue =
> > ,&&&&&&&&&&;      Mailstop: 12H5          Hampton, VA 23664      -
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> > |  |       ;--' | Mail:  elke@jlab.org    Mobil: 001-757-256-5224   -
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> >
> >
>
>

 ( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
  )    `\                                                  -
 /    '. |                                                  +
 |       `,              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.:  001-757-269-6331                              -
            +=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+