RunV Alignment


Global Alignment

The global alignment is done is few steps. The SSD is considered as a solid object. Translations in X, Y and Z and rotation in Phi are determined and corrected for in the global positionning of the SSD. The translation in Z was determined by centering at zero the dy residual of the ladder 16.
No corrections Correction for a shift in X. dX=0.418 cm
In addition, correction for a shift in phi : dPhi=0.0181 rad (equal to a dX=0.417 cm at R=23.0 cm In addition, correction for a shift in Z. dZ=-0.083 cm

After this global alignment, the situation for individual ladders is given by the following plots.

dx versus phi

dy versus dx

dx

dy

dx versus x

dy versus y

dx versus z

dy versus z


Ladder Alignment

ladderdx versus phidxdydx versus zdy versus z
ladderp0 (offset)p1 (slope)dx(phimean)plotmeanRMSplotmeanRMSplotp0 (offset)p1 (slope)plotp0 (offset)p1 (slope)plot
1 0.011833 0.000057 0.017044 1 0.015576 0.2190011 -0.0146800.2333701 0.000127 0.001257 1 -0.0190440.000475 1
2 -0.218525 0.002792 -0.015336 2 -0.0142550.2607572 -0.0134540.2712242 -0.0211690.001190 2 -0.017543-0.0006722
3 0.188529 -0.002954 0.029508 3 0.026253 0.1797573 0.001231 0.2292793 0.022338 0.001103 3 -0.0208680.004033 3
4 0.128856 -0.003361 0.007071 4 0.005092 0.1851514 0.038530 0.2423244 0.003653 0.001142 4 0.029664 0.004649 4
5 0.038578 -0.001857 0.005826 5 0.008967 0.1704815 -0.0089430.2390295 0.004609 0.000560 5 -0.0312560.005183 5
6 0.000158 -0.003760 -0.0007106 -0.0014600.1767206 -0.0246870.2383266 0.000234 0.000158 6 -0.0383080.004920 6
7 -99.000000 -99.000000 -99.0000007 0.000000 0.0000007 0.000000 0.0000007 -99.00000-99.000007 -99.00000-99.000007
8 -99.000000 -99.000000 -99.0000008 0.000000 0.0000008 0.000000 0.0000008 -99.00000-99.000008 -99.00000-99.000008
9 -0.288950 -0.004638 -0.038428 9 -0.0370310.1758149 0.043952 0.2401869 -0.032996-0.0008919 0.012232 0.004874 9
10 -0.025042 -0.000404 0.003702 10 0.007278 0.21311110-0.0282970.237095100.005408 -0.00195110-0.0289920.001404 10
11 -99.000000 -99.000000 -99.00000011 0.000000 0.00000011-0.2387580.00000011-99.00000-99.0000011-99.00000-99.0000011
12 0.089359 0.000923 -0.011157 12 -0.0089790.19278912-0.0081920.22079612-0.009177-0.00232612-0.0088430.001395 12
13 -0.389904 -0.003359 0.032737 13 0.034814 0.19524613-0.0293830.253195130.033438 -0.00182613-0.0300770.005033 13
14 -0.340269 -0.002438 0.014649 14 0.016788 0.185299140.024918 0.226646140.019658 -0.001733140.014869 0.003794 14
15 -0.285139 -0.001968 0.031762 15 0.033329 0.180996150.043498 0.241647150.043554 -0.001529150.005256 0.004861 15
16 0.295335 -0.001663 -0.003986 16 -0.0005460.185295160.033003 0.21367116-0.001003-0.000850160.030513 0.002095 16
17 0.273745 -0.001726 -0.003412 17 -0.0013630.212723170.019881 0.25536517-0.004203-0.000358170.038934 0.004375 17
18 0.426659 -0.003038 -0.012925 18 -0.0140740.185659180.005699 0.23844718-0.0128110.000219 180.023877 0.004753 18
19 0.428185 -0.003546 -0.018962 19 -0.0211510.20343119-0.0235070.25374819-0.0175060.000558 19-0.0121160.004295 19
20 -0.170101 0.001755 0.019045 20 0.017402 0.192926200.003885 0.229758200.015843 0.000949 200.003430 0.000241 20

Lilian MARTIN
Last modified: Fri Mar 11 16:21:29 CET 2005