University of Wisconsin-Madison Endcap Z Positions James N. Bellinger University of Wisconsin-Madison 23-October-2009 James N. Bellinger 23-October-2009

ME+2,3,4 ME+1 ME-2,3,4 Data question James N. Bellinger 23-October-2009

ME+2,3,4 James N. Bellinger 23-October-2009

From Last Week Z positions of Plus Endcap chamber pins with B=3.8 (Link Run 61) James N. Bellinger 23-October-2009

Plus Side looks reasonable ME+1 does not match perfectly with Celso’s fits Something is wrong with the IR between MAB+3/9 and ME+1/PT5: 15mm different from the rest ME+2,3,4 look similar to CRAFT08 Chamber centers and tilts were accidentally deleted—reconstructing James N. Bellinger 23-October-2009

ME+1 James N. Bellinger 23-October-2009

ME+1Tilts Tilt of ME+1/2 chambers at 0T looks fine at 0 are all over the map James N. Bellinger 23-October-2009

ME+1 Tilts at 3.8T Difference James N. Bellinger 23-October-2009

ME+1 Chamber Z James N. Bellinger 23-October-2009

Redo this w/ Celso’s new results 3.8T (Link run 61) My Z mm My Tilt (mrad) Celso Z mm Celso tilt (mrad) 2_02 6761.05 -3.42 6630.37 -4.188 2_08 6762.46 -3.47 6630.35 -4.084 2_14 6762.39 -3.74 6630.34 -4.328 2_20 6762.49 -3.30 6632.42 -3.229 2_28 6763.17 -3.34 6634.17 -4.276 2_32 6762.40 -3.72 6632.89 -4.154 Redo this w/ Celso’s new results Systematic shifts Deflections more similar James N. Bellinger 23-October-2009

Minus Side problems Initial positions seem rather far out of line MAB tilts are not available for all positions Procedure was take pre-CRAFT survey positions for 3 disks Fit and get new TP locations Use MAB+IR+Zsensor positions differences to calculate field-on positions Used averages to estimate differences from Cal measurements for MAB tilts Refit James N. Bellinger 23-October-2009

Deviations 3.8T to 0T ME-2 ME-3 Inconsistency: chamber positions wrong in model. Otherwise ME-2 and ME-3 (and most of ME-4) agree: The dominant effect is a shift in disk positions. ME-4 SLM 1 SLM 2 SLM 3 James N. Bellinger 23-October-2009

Z positions at 3.8T Both SLM 1 and 3 have poor estimates of the Z shift at PT1 and PT3. I used average shifts to estimate what these might be: uncertainties of order 5mm with this procedure. SLM 1 SLM 2 SLM 3 James N. Bellinger 23-October-2009

Plan for ME-2,3,4 Use Run81 and UR-0144 to define ME-4 and work inward to define ME-3 and ME-2 using Z-sensor data Fit Use fit TP locations and R81 vs R61 to define field- on TP locations Refit and compare 4 hours? Repair ME-2/SLM2 model Hour? Probably something obvious James N. Bellinger 23-October-2009

Puzzle with ME+3 Problem Oleg announced mechanical problems at ME+3/PT3 and ME+3/PT6 15-July I looked for this in the data, and found discontinuities in other locations instead James N. Bellinger 23-October-2009

Expected discontinuities, but There ARE transitions: but not at PT3 or PT6! 15July James N. Bellinger 23-October-2009

All ME+3 Z1 sensors near 15Jul James N. Bellinger 23-October-2009

ME+3 Z2 sensors near 15Jul James N. Bellinger 23-October-2009

ME+3 Z1 over all CRAFT09 Jump Jump PT1 Jump PT6 Varies a lot 28Jul James N. Bellinger 23-October-2009

ME+3 Z2 over CRAFT09 Little variation, mostly insignificant Z2 reaches forward to Z-tube to ME+2: Same disk James N. Bellinger 23-October-2009

BACKUP James N. Bellinger 23-October-2009

YB-2 MAB IR target position The RMS on MAB tilt contributions is 5.4mm for the Plus side PT 1 PT 2 PT 3 PT 4 PT 5 PT 6 Calibrated Z -6703.8 -6694.65 -6694.94 -6701.02 -6693.88 -6693.17 Calibrated tilt 0.000087 -0.003351 -0.002635 -0.004677 -0.004415 R32 Z -6695.93 -6692.68 -6693.19 -6696.72 -6693.09 -6691.21 R32 tilt -0.003578 -0.000977 -0.00459 -0.004293 R51 Z -6695.63 -6689.94 -6689.96 -6695.36 -6694.06 R 51 tilt -0.003333 -0.001012 -0.003735 R61 Z -6696.04 -6691.95 -6689.73 -6691.03 -6687.46 -6688.83 R61 tilt -0.002897 -0.001099 -0.004049 -0.003298 Tilt: Calibrated to R32(mrad) 0.087 0.227 -3.351 -1.658 -0.087 -0.122 Tilt: Calibrated to R51(mrad) -0.018 -1.623 -0.384 -0.68 R51 to R61(mrad) -0.436 -0.244 -0.437 Z Calib to R32(mm) -7.87 -1.97 -1.75 -4.3 -0.79 -1.96 Z Calib to R51(mm) -8.17 -4.71 -4.98 -5.66 0.18 -0.49 R51 to R61(mm) 0.41 2.01 -0.23 -4.33 -6.6 -3.85 James N. Bellinger 23-October-2009