Performance of the multianode cylindrical silicon drift detector in the CERES NA45 experiment: first results

doi:10.1016/0168-9002(93)90363-M

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

Volume 326, Issues 1–2, 1 March 1993, Pages 273-278

https://doi.org/10.1016/0168-9002(93)90363-M Get rights and content

Abstract

A silicon drift detector of circular geometry giving unambiguously the radial and azimuthal coordinates of particle's interaction point for events with high multiplicity is part of the experimental set up of the NA45 experiment at CERN SPS. The paper reviews the characteristics of the detector and of its assembly among the other detectors of the experiment. The first experimental results showing the performance of the detector in term of resolution and its effectiveness in reconstructing the position of the event are reported.

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The leakage current of a detector has three components: bulk generation current caused by thermal generation, diffusion leakage current caused by minority carrier׳s diffusion from un-depleted areas to the depletion region, and surface generation current caused by defects such as dangling bonds or scratches on the surface during processing. Surface leakage current increases with detector area and can surpass the bulk leakage current by a factor of 3–8 [9]. In order to lower the surface leakage current contribution, fabrication process steps on both sides of wafers have to be optimized to have damage free devices fabricated on front and backside of the wafers.
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A variety of Si detectors have been developed and processed at BNL with its unique detector fabrication facility. These detectors include Si drift detectors (SDD); Si micro- and mm-strip detectors; Si pad detectors; and Si pixel detectors with a variety of configurations. In this paper, the details of the design and processing technology of large area SDD for the STAR SVT at RHIC, micro- and mm-strip detectors for CERN RD39/NA60 experiments; and radiation tolerant n/n, n/p pixel detectors for LHC experiments will be given. In addition, simulation results of new types of Si strip/pixel detectors with improved radiation tolerance will be presented for the first time.

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^☆: Work supported by the US Department of Energy under contract no. DE-AC02-76CH00016 and by the Italian INFN and MURST.

¹: Present address: GSI Darmstadt, Germany.

²: Present address: Universität Bonn, Germany.

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Performance of the multianode cylindrical silicon drift detector in the CERES NA45 experiment: first results☆

Abstract

Nucl. Instr. and Meth.

Nucl. Instr. and Meth.

Nucl. Instr. and Meth.