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

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

Tarball download

• 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

-- MatthewNeedham - 07 May 2009