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Precision timing detectors with cadmium-telluride sensor

Bornheim, A. and Pena, C. and Spiropulu, M. and Xie, S. and Zhang, Z. (2017) Precision timing detectors with cadmium-telluride sensor. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 867 . pp. 32-39. ISSN 0168-9002. doi:10.1016/j.nima.2017.04.024.

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Precision timing detectors for high energy physics experiments with temporal resolutions of a few 10 ps are of pivotal importance to master the challenges posed by the highest energy particle accelerators such as the LHC. Calorimetric timing measurements have been a focus of recent research, enabled by exploiting the temporal coherence of electromagnetic showers. Scintillating crystals with high light yield as well as silicon sensors are viable sensitive materials for sampling calorimeters. Silicon sensors have very high efficiency for charged particles. However, their sensitivity to photons, which comprise a large fraction of the electromagnetic shower, is limited. To enhance the efficiency of detecting photons, materials with higher atomic numbers than silicon are preferable. In this paper we present test beam measurements with a Cadmium-Telluride (CdTe) sensor as the active element of a secondary emission calorimeter with focus on the timing performance of the detector. A Schottky type CdTe sensor with an active area of 1 cm^2 and a thickness of 1 mm is used in an arrangement with tungsten and lead absorbers. Measurements are performed with electron beams in the energy range from 2 GeV to 200 GeV. A timing resolution of 20 ps is achieved under the best conditions.

Item Type:Article
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URLURL TypeDescription
Bornheim, A.0000-0002-0128-0871
Spiropulu, M.0000-0001-8172-7081
Xie, S.0000-0003-2509-5731
Zhang, Z.0000-0002-1630-0986
Additional Information:© 2017 Elsevier B.V. Received 13 December 2016, Revised 4 April 2017, Accepted 15 April 2017, Available online 18 April 2017.
Subject Keywords:Cadmium telluride; Timing; Calorimeter
Record Number:CaltechAUTHORS:20170705-073221515
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Official Citation:A. Bornheim, C. Pena, M. Spiropulu, S. Xie, Z. Zhang, Precision timing detectors with cadmium-telluride sensor, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 867, 21 September 2017, Pages 32-39, ISSN 0168-9002, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78743
Deposited By: Tony Diaz
Deposited On:05 Jul 2017 20:04
Last Modified:15 Nov 2021 17:42

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