LHCb VErtex LOcator module characterisation and long term quality assurance tests

Bates, A. et al. (2009) LHCb VErtex LOcator module characterisation and long term quality assurance tests. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 611(1), pp. 41-51. (doi:10.1016/j.nima.2009.09.051)

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Abstract

LHCb is the dedicated b-physics experiment of the LHC. Its vertex detector, the VErtex LOcator (VELO), will operate in a harsh radiation environment with limited access due to its proximity to the LHC beam. To ensure the long term operation and performance, every module was required to pass a set of quality assurance tests. These were specifically developed for the VELO modules to take into account their operational environment and assembly steps. Each VELO module was rigorously inspected, tested and thermally cycled in the Glasgow module burn-in procedures. This paper provides details of the burn-in procedures and summarises the main results that were found. Some of the major results presented in this paper are: the full characterisation of the leakage currents; identification of bad channels; and signal to noise measurements. A few minor problems were identified through visual inspections of the modules and the feedback into the production process proved critical. As a result of the electrical and thermal tests, one module out of the 45 that were tested was rejected due to its thermal performance. Studies are also reported, based on individual modules, characterising the front end read out chip pulse shape.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Marinho, Mr Franciole and Viret, Dr Sebastien and Parkes, Dr Christopher and Saavedra, Dr Aldo and Gersabeck, Mr Marco and Melone, Mr John and Doherty, Mr Frederick
Authors: Bates, A., Dimattia, R., Doherty, F., Dumps, R., Dwyer, L., Gersabeck, M., Marinho, F., Melone, J., Parkes, C., Saavedra, A., Tobin, M., and Viret, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
ISSN:0168-9002
ISSN (Online):1872-9576
Published Online:26 September 2009

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
398471First measurement of the CKM triangle gamma at LHCbChristopher ParkesScience & Technologies Facilities Council (STFC)PP/C001257/1Physics and Astronomy