1. University of Wisconsin-Madison
CSC Chamber Centers
James N. Bellinger
University of Wisconsin-Madison
18-June-2010
James N. Bellinger 18-June-2010

2. While searching for the Z
Himali found some discrepancies in Z between monitored and unmonitored
I noticed a large excursion in X/Y, traced it to Oleg’s PG file
9mm is a bit excessive: suspected typo and changed 699etc to 679etc
Temporary test only! May just set to ideal instead.
Checked if some of the other numbers agreed with the PG file we got from tracking.
They didn’t. Crud
James N. Bellinger 18-June-2010

3. Back to the PG basics Redo chamber centers from Oleg’s files
Document and automate as I go
CSC/index.html
Documentation mostly done
Created an xml file with only PG estimates, no monitored chambers
Adding the monitored chambers is only another day to do and document, but here it is Friday already
James N. Bellinger 18-June-2010

4. What happened to interpolation?
It was only suited for the ME+1/2 data: ME1/3 isn’t ready because the Z work isn’t done, and ME-1/2 is too sparse.
Rather than have only one (not yet proved better) procedureal exception, do the whole thing the same way for now.
010/pgonly.xml
Absolute coordinate xml file
James N. Bellinger 18-June-2010

5. Testing Pivarski’s tilt tool The deviation display plots follow
ME+ all have Z(outer)>Z(inner)
ME- all have Z(outer)<Z(inner) OK
The deviation display plots follow
James N. Bellinger 18-June-2010

6. Deviation Display: x/y
James N. Bellinger 18-June-2010

7. Deviation Display: z ??
James N. Bellinger 18-June-2010

8. Z deviations Even and odd vary by O(1.1 mm)
Odd chambers don’t have coded targets surveyed, so their Z’s are ideal
Investigating
James N. Bellinger 18-June-2010

9. Deviation Display: RotX
James N. Bellinger 18-June-2010

10. Deviation Display: RotY
James N. Bellinger 18-June-2010

11. Deviation Display: RotZ
James N. Bellinger 18-June-2010

12. Prospects
I have a documented procedure for creating the positions of the unmonitored chambers
I need to compare results with the older version (this is an hour old)
Need to track down source of 1.1cm shift at ME-4/1
Once it looks sane, add monitored chambers; should have this tomorrow (tonight if the shift is easy to find)
Needs versioning to fit into the overall system
James N. Bellinger 18-June-2010

13. UPDATE The “PG-only” constants use Positions entirely PG
YE1 disk centers/angles from May 2010 Link fit
YE3 disk centers/angles from Survey UR-0161
YE2 disk centers/angles from Survey UR-0160
Known to be wrong: disks moved
Average RotX for ME1/2 from May 2010 Link fit
Average RotX for ME2,3,4 from Bellinger fits to SLM lines which used May 2010 data and the disk survey positions described above
Average RotX for ME1/3 from CRAFT09
Positions entirely PG
Angles informed by averages from fits
As requested, updated information for archive
James N. Bellinger 18-June-2010

14. Comparisons/corrections
Shift was 1.1cm, not 1.1mm for the coded target measurements for ME-4
I find nothing wrong with the derivation of the chamber centers, starting with UR-0088
Not much variation chamber to chamber
Real effect?
Don’t know if I should adjust the odd-numbered chambers to match
Difference between Carolli PG centers and mine:
X or Y, RMS 1mm
Z RMS 3mm, 2mm if omit the ME-4 oddity above
As requested, updated information for archive
James N. Bellinger 18-June-2010