A measurement of Lorentz angle and spatial resolution of radiation hard silicon pixel sensors

I. Gorelov, G. Gorfine,M. Hoeferkamp,S.C. Seidel, A. Ciocio, K. Einsweiler,M. Gilchriese,A. Joshi,S. Kleinfelder,R. Marchesini,O. Milgrome,N. Palaio,F. Pengg,J. Richardson,G. Zizka,M. Ackers,P. Fischer,M. Keil,S. Meuser,T. Stockmanns,J. Treis, N. Wermes,C. Gößling,F. Hügging,J. Wüstenfeld,R. Wunstorf, D. Barberis,R. Beccherle,M. Cervetto,G. Darbo,G. Gagliardi,C. Gemme, P. Morettini,P. Netchaeva,B. Osculati,F. Parodi, L. Rossi,K. Dao,D. Fasching,L. Blanquart,P. Breugnon,D. Calvet,J.-C. Clemens, P. Delpierre,G. Hallewell,D. Laugier,T. Mouthuy, A. Rozanov,C. Trouilleau,I. Valin,M. Aleppo,A. Andreazza,M. Caccia, T. Lari, C. Meroni, F. Ragusa,C. Troncon, G. Vegni,T. Rohe,G.R. Boyd, H. Severini,P.L. Skubic, J. Snow,P. Šı́cho,L. Tomasek, V. Vrba, M. Holder,D. Lipka,M. Ziolkowski, D. Cauz,S. D'Auria,C. del Papa, H. Grassman,L. Santi, K.H. Becks,P. Gerlach,C. Grah,I. Gregor, T. Harenberg,C. Linder

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment（2002）

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摘要

Silicon pixel sensors developed by the ATLAS collaboration to meet LHC requirements and to withstand hadronic irradiation to fluences of up to 1015neq/cm2 have been evaluated using a test beam facility at CERN providing a magnetic field. The Lorentz angle was measured and found to alter from 9.0° before irradiation, when the detectors operated at 150V bias at B=1.48T, to 3.1° after irradiation and operating at 600V bias at 1.01T. In addition to the effect due to magnetic field variation, this change is explained by the variation of the electric field inside the detectors arising from the different bias conditions.

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29.40.G,29.40.W,85.30,61.80.H

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