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Re: updated geometry
On Mon, 14 Jul 2008, Beni Zihlmann wrote:
Dear Richard et al.,
I'm a bit suprised about your reaction on the aluminium plate. Because we
presented it more than ones. We really need it to for the mechanical
construction. That is also the reason why I asked beni to put it in to see
what the impact on the photon reconstruction is.
I'm really looking forward to Matt's studies.
cheers elke
> Date: Mon, 14 Jul 2008 16:49:23 -0400
> From: Beni Zihlmann <zihlmann@jlab.org>
> To: Richard Jones <richard.t.jones@uconn.edu>
> Cc: Matthew Shepherd <mashephe@indiana.edu>, halld-offline@jlab.org
> Subject: Re: updated geometry
>
> Hi Richard,
> attached is the Barrel calorimeter xml geometry file with the nominal
> 6x4 readout
> and the fix of the inner aluminum plate for verification.
>
> cheers,
> Beni
>
> Richard Jones wrote:
> > Beni,
> >
> > Can you take care of diagnosing this? Once you find a fix, please
> > forward to me and I can verify it quickly.
> >
> > Richard Jones
> >
> > Matthew Shepherd wrote:
> >>
> >> Hi Richard and Beni,
> >>
> >> It would be nice to get these fixed ASAP since Blake and I working
> >> right now on resolution and reconstruction studies using the BCAL.
> >> Can the change be made and checked in?
> >>
> >> Thanks,
> >>
> >> Matt
> >>
> >>
> >> On Jul 14, 2008, at 10:35 AM, Richard Jones wrote:
> >>
> >>> Beni, some work is still needed on this geometry. The following
> >>> items are invalid, so that no particle will ever be able to enter
> >>> their volumes. This is not a comprehensive list, just the result of
> >>> a quick spot check I did. I have a tool that can enables a quick
> >>> point-and-click check on individual volumes. I can show you how to
> >>> use it, if you are interested.
> >>> • FDC cables re-routed to run upstream
> >>> • 8mm aluminum plate in front of BCAL
> >>> That aluminum 8mm plate will completely wipe out the BCal
> >>> resolution, once it is in there! For the moment, however, it causes
> >>> no problems at all, because particles do not see it. :-)
> >>>
> >>> -Richard Jones
> >>>
> >>>
> >>> Beni Zihlmann wrote:
> >>>>
> >>>> Dear colleagues,
> >>>> I updated the geometry in the repository. The geometry now reflects
> >>>> all the changes and design decisions that have been made lately.
> >>>> 1) remove outer most CDC layer thereby reducing the CDC radius by
> >>>> 1.6 cm
> >>>> including the cable runs.
> >>>> 2) re-route the FDC cables to run upstream
> >>>> 3) add an 8mm aluminum plate on the inside of the BCAL
> >>>> 4) the BCAL readout segmentation is 4x6 (sector x layer)
> >>>>
> >>>> all these changes are now available the in geometry file
> >>>> hddsGeant3.F located in
> >>>> src/programs/Simulation/HDGeant/
> >>>>
> >>>> cheers,
> >>>> Beni
> >>>>
> >>>
> >>
> >
> >
> >
>
>
> --
> ***********************************************************
> Benedikt Zihlmann
> TJNAF
> HallD 12C/ F350
> Suite 8
> 12000 Jefferson Av.
> Newport News VA, 23606
>
> tel: 757 269 5310
> fax: 757 269 6331 zihlmann@jlab.org
> ***********************************************************
>
>
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