Silicon pixel sensors developed by the ATLAS collaboration to meet LHC requirements and to withstand hadronic irradiation to fluences of up to 1015 neq/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 150 V bias at B=1.48 T, to 3.1° after irradiation and operating at 600 V bias at 1.01 T. 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. The depletion depths of irradiated sensors at various bias voltages were also measured. At 600 V bias 280 μm thick sensors depleted to ≈200 μm after irradiation at the design fluence of 1×1015 1 MeV neq/cm2 and were almost fully depleted at a fluence of 0.5×1015 1 MeV neq/cm2. The spatial resolution was measured for angles of incidence between 0° and 30°. The optimal value was found to be better than 5.3 μm before irradiation and 7.4 μm after irradiation.

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. Sícho, 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. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 481:1-3(2002 Apr), pp. 204-221. [10.1016/S0168-9002(01)01413-9]

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

M. Aleppo;A. Andreazza;C. Meroni;F. Ragusa;G. Vegni;S. D'Auria;
2002

Abstract

Silicon pixel sensors developed by the ATLAS collaboration to meet LHC requirements and to withstand hadronic irradiation to fluences of up to 1015 neq/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 150 V bias at B=1.48 T, to 3.1° after irradiation and operating at 600 V bias at 1.01 T. 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. The depletion depths of irradiated sensors at various bias voltages were also measured. At 600 V bias 280 μm thick sensors depleted to ≈200 μm after irradiation at the design fluence of 1×1015 1 MeV neq/cm2 and were almost fully depleted at a fluence of 0.5×1015 1 MeV neq/cm2. The spatial resolution was measured for angles of incidence between 0° and 30°. The optimal value was found to be better than 5.3 μm before irradiation and 7.4 μm after irradiation.
Depletion depth; LHC; Lorentz angle; Radiation hardness; Silicon pixel detectors; Spatial resolution
Settore FIS/01 - Fisica Sperimentale
apr-2002
Article (author)
File in questo prodotto:
File Dimensione Formato  
1-s2.0-S0168900201014139-main.pdf

accesso riservato

Tipologia: Publisher's version/PDF
Dimensione 710.51 kB
Formato Adobe PDF
710.51 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
com-indet-2001-006.pdf

accesso aperto

Tipologia: Pre-print (manoscritto inviato all'editore)
Dimensione 717.8 kB
Formato Adobe PDF
717.8 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/139477
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 37
  • ???jsp.display-item.citation.isi??? 32
social impact