James N. Bellinger University of Wisconsin-Madison 18-June-2010

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

2. James N. Bellinger 18-June-2010 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

3. James N. Bellinger 18-June-2010 Back to the PG basics • Redo chamber centers from Oleg’s files • Document and automate as I go • http://www.hep.wisc.edu/~jnb/cms/predictCSC/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

4. James N. Bellinger 18-June-2010 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. • http://www.hep.wisc.edu/~jnb/cms/16Jun2010/pgonly.xml • Absolute coordinate xml file

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

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

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

8. James N. Bellinger 18-June-2010 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

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

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

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

12. James N. Bellinger 18-June-2010 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

13. James N. Bellinger 18-June-2010 UPDATE • The “PG-only” constants use • 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

14. James N. Bellinger 18-June-2010 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