From crsteffe@dustbunny.physics.indiana.edu Sun Mar 29 21:09:06 1998
Date: Sun, 29 Mar 1998 21:06:54 -0500
From: Craig Steffen <crsteffe@dustbunny.physics.indiana.edu>
Subject: coordinate systems and z positions of stuff
To: rad_phi@cebaf.gov
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A boring message containing information about the radphi experiment coordinate
system and positions of components along the z axis.
X is horizontal, with beam left as positive X. Y is vertical, with up as
positive Y. Z is the in the direction of beam flow.
X=0, Y=0 is defined to be the nominal beam axis. Z=0 is the upstream face of
the target in its nominal position. Distances below are in cm, all have
uncertainties of <~.5 cm.
front of the alcove is at (approx) z=-289.9
downstream face of the shield wall z=-104.4
upstream UPV counters z=-50.9
middle UPV counters z=-47.4
downstream UPV counters z=-43.9
upstream face of target z=0.0
upstream face of RPD mounting plate z=10.0
upstream face of CPV frame z=72.0
upstream face of LGD frame z=72.9
upstream face of glass wall z=109.7
downstream face of cellular wall z=181.3
downstream face of LGD frame z=218.0
back wall of alcove(approximate) z=308.2
Craig Steffen
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Craig P. Steffen crsteffe@dustbunny.physics.indiana.edu
IU HEP PhD grad student home#:812-323-0756 work#:812-855-2317
http://anthrax.physics.indiana.edu/~crsteffe
career goal: to be the first Vorlon Time Lord
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