[Brahms-dev-l] TFW2 geometry

Dear Collaborators.

Here is attached a plot showing the angle between a line, which connets
the track intersetion with TFW2 to the TFW2 arc center, and the axis of
MRS spectrometer. From the plot it seems that the center of each detector
is positioned along the arc in steps of 0.693265*2 = 1.38653 degrees
instead of 1.0346 degrees which Dana told us before. The center of slat 21
(closest to the MRS axis) is on the axis of the spectrometer but with a
small offset of -0.030265 degrees. With this geometry, track matching with
hit in TFW2 starts to look better.

Before proceeding with further analysis, is there anyone who could 
remeasure the angle or slat separation along the arc of TFW2? 

Best regards,
Zhongbao 
-----------------------------------------------------
Zhongbao YIN                 Phone:  +47-55-582792 (O)
Address:                             +47-55-276803 (H)
  Fantoftveien 14G 466       E-mail:
  5075  Bergen                  Yin.Zhongbao@fi.uib.no
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