CERN Accelerating science

LHCb Note
Report number	LHCb-PROC-2004-002 ; CERN-LHCb-PROC-2004-002
Title	The straw tube technology for the LHCb outer tracking system
Author(s)	Bachmann, S (U. Heidelberg, ITP) ; Bagaturia, I (U. Heidelberg, ITP) ; Deppe, H (U. Heidelberg, ITP) ; Eisele, F (U. Heidelberg, ITP) ; Haas, T (U. Heidelberg, ITP) ; Hajduk, L (Cracow, INP) ; Langenegger, U (U. Heidelberg, ITP) ; Michalowski, J (Cracow, INP) ; Nawrot, A (Cracow, INP) ; Polok, G (Cracow, INP) ; Pellegrino, A (NIKHEF, Amsterdam) ; Schuijlenburg, H (NIKHEF, Amsterdam) ; Schwierz, R (Dresden, Tech. U.) ; Sluijk, T (NIKHEF, Amsterdam) ; Spelt, J (NIKHEF, Amsterdam) ; Spaan, B (Dresden, Tech. U.) ; Szczekowski, M (Warsaw, Inst. Nucl. Studies) ; Stange, U (U. Heidelberg, ITP) ; Syryczynski, K (Warsaw, Inst. Nucl. Studies) ; Trunk, U (U. Heidelberg, ITP) ; Walter, M (U. Heidelberg, ITP) ; Wiedner, D (U. Heidelberg, ITP) ; Uwer, U (U. Heidelberg, ITP) ; Van Appeldorn, G (NIKHEF, Amsterdam)
Note	NIMA 535 (2004) 171-174
Submitted to	10th International Vienna Conference on Instrumentation, Vienna, Austria, 16 - 21 Feb 2004
Submitted by	anu.liisa.saarelainen@cern.ch on 26 Aug 2004
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; LHCb
Free keywords	detector ; silicon tracker
Abstract	For the outer tracking system of the LHCb spectrometer 53.760 straws of 2.5 m length will be used. They are arranged in detector modules of 5 m length and 0.34 m width. The envisaged spatial resolution over the entire active area is 200$mu$m resulting in stringent requirements on the accuracy for the module construction. In this paper we discuss the optimisation of the straws, design and construction of detector modules. The long term operation properties of straws in two different counting gases, Ar/CO$_2$ (70/30) and Ar/CO$_s$/CF$_4$ (75/10/15), is compared.
Copyright/License	Preprint: (License: CC-BY-4.0)

Email contact(s) : bachmann@physi.uni-heidelberg.de