Re: [Brahms-dev-l] 2001 geometry question

Hi Bjoern,

The tofw wall does not move in real life it is at a fixed pos.
Neither does it in BRAG - try to make two topview plots - for mrs at 90 with
mmpos=0 and 90. So
whatever you have seen is NOT in the basic geometry setup. By the way TOFW
is not part of the volume
MINO for which the position is

How did you conclude it was mowing. Please clarify this?

Flemming

----------------------------------------------------------------
Flemming Videbaek
Physics Department
Brookhaven National Laboratory

e-mail: videbaek@bnl.gov
phone: 631-344-4106
----- Original Message ----- 
From: "Bjorn H Samset" <bjornhs@rcf2.rhic.bnl.gov>
To: "BRAHMS Software list" <brahms-dev-l@lists.bnl.gov>
Sent: Sunday, March 20, 2005 5:04 AM
Subject: [Brahms-dev-l] 2001 geometry question


>
> Hi all - I have a hopefully very simple question: In 2001, when the MRS
> was pushed back 50cm, was only TPM1-D5-TPM2 moved, or was the TOFW also
> included?
>
> I ask because currently, as far as I can tell,
> * geant pushes back the TOFW when I use the mmpos parameter, placing it at
> x~480cm
> * in the geometry database, only the TPM1-D5-TPM2 complex has been moved
> while the TOFW is still at x~430cm
>
> I noticed because acceptance maps made with mmpos 50 don't quite describe
> the data, but I can tweak them to fit by changing the fiducial cut on the
> slat range - i.e. consistent with a wrong TOFW position. However, I
> thought I knew that the TOFW had also been moved... Could someone clear
> this up for me?
>
> Follow-up: In response to this, we should either change the geo db for the
> 2001 runs, or fix brag so that the TOFW isn't affected by mmpos. The
> latter I can do, but if it's the first I'll have to leave it e.g. to Kris.
>
> Thanks :-)
>
> --Bjorn
>
>
>
>
> --
> Bjorn H. Samset                           Phone: 22856465/92051998
> PhD student, heavy ion physics            Adr:   Schouterrassen 6
> Inst. of Physics, University of Oslo             0573 Oslo
>                               \|/
> ----------------------------> -*- <-----------------------------
>                               /|\
>
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