First Alignment of the Inner Tracker using data from the TI-8 Sector Test LHCb-2009-030


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.


align3.gif T2 box residuals using the survey gif pdf
align3.gif T2 box residuals using the ideal geometry gif pdf
align3.gif Residual width versus p in the Monte Carlo gif pdf

Tarball download

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


2008 IT running, TED run, alignment

-- MatthewNeedham - 07 May 2009

Topic attachments
I Attachment History Action Size Date Who Comment
GIFgif align.gif r1 manage 13.4 K 2009-05-07 - 14:54 MatthewNeedham  
GIFgif align3.gif r1 manage 16.3 K 2009-05-07 - 13:53 MatthewNeedham  
PDFpdf def.pdf r1 manage 7.6 K 2009-05-07 - 14:53 MatthewNeedham  
Unknown file formatgz firstalignment.tar.gz r1 manage 623.9 K 2009-05-07 - 14:53 MatthewNeedham  
GIFgif itg.gif r1 manage 5.8 K 2009-05-07 - 14:33 MatthewNeedham  
PDFpdf itg.pdf r1 manage 3.9 K 2009-05-07 - 14:33 MatthewNeedham  
PDFpdf surveyed.pdf r1 manage 37.8 K 2009-05-07 - 14:22 MatthewNeedham  
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Topic revision: r2 - 2009-05-07 - MatthewNeedham
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