First Alignment of the Inner Tracker using data from the TI-8 Sector Test LHCb-2009-030
Abstract
A first software alignment of the Inner Tracker using data from the LHC synchronization test is described. Residual plots are used to adjust the position of the Inner Tracker boxes and layers in the x-direction and to verify the correctness of the survey data. With the corrections determined in this note the position of the x-measuring ladders is known to a precision of $100~\mu$m or better.
Plots
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T2 box residuals using the survey |
gif |
pdf |
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T2 box residuals using the ideal geometry |
gif |
pdf |
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Residual width versus p in the Monte Carlo |
gif |
pdf |
The tarball contains :
- tex , bib and pdf of the note
- gifs and pdf of the figures
- align3.C: macro to make plot of residuals with survey geometry
- align.C: macro to make plot of residuals with ideal geometry
- itg.C: TGraph of residual width versus p
- root files needed by the macros
Keywords
2008 IT running, TED run, alignment
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MatthewNeedham - 07 May 2009