1. University of Wisconsin at Madison BMU Alignment Corrections
BMU ReAlignment
James N. Bellinger
University of Wisconsin at Madison
29-July-2008
BMU Alignment Corrections

2. Corrections from Survey
Tube Front
Tube Back
Phi is always measured
as stack number

3. Original DelX
WEST
WooHyun's plots
EAST

4. Earlier Corrected DelX
Uses phi correction
WEST
Not quite correct yet.
EAST

5. Evaluation The error in phi is small
The error varies systematically with phi
Should be easy to fix
Fit directly to delta-X

6. Subdivide Further at SW
Del-X in cm
Motivation:
These look flat
phi

7. New Corrected DelX
WEST
EAST

8. Original vs Corrected DelX