C1 and RICH geometry

From: Claus O. E. Jorgensen (ekman@nbi.dk)
Date: Fri Apr 05 2002 - 11:10:41 EST

  • Next message: Flemming Videbaek: "Re: C1 and RICH geometry" 

    I've looked at the positions of the image planes of C1 and the RICH (with
the new geometry from the db). There are small offsets - I can see this by
comparing the tracks and the signals in the two detectors. 
The question is if we want to change the geometry of the detectors
or if the image planes should be moved a bit (in the PidModules).

I think the latter is the most correct. The survey geometry (outer edges
of the detectors) is probably right, and I think the offsets come from
small misalignments of the PM arrays. I've therefore introduced the
offsets in the software (as fImagePlaneOffset for the RICH and
fBackPlaneOffset for C1). The best values are of course committed to BRAT.

Any objections to this way of doing it?

Claus

+-------------------------------------------------------------+
| Claus Jørgensen                                             |
| Cand. Scient.                  Phone  : (+45) 33 32 49 49   |
|                                Cell   : (+45) 27 28 49 49   |
| Niels Bohr Institute, Ta-2,    Office : (+45) 35 32 53 07   |
| Blegdamsvej 17, DK-2100,       E-mail : ekman@nbi.dk        |
| University of Copenhagen       Home   : www.nbi.dk/~ekman/  |
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