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Charge collection efficiency and resolution of an irradiated double-sided silicon microstrip detector operated at cryogenic temperatures

Borer, K et al. (2000) Charge collection efficiency and resolution of an irradiated double-sided silicon microstrip detector operated at cryogenic temperatures. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 440 (1). 17 -37. ISSN 0168-9002 (doi:10.1016/S0168-9002(99)00800-1)

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Publisher's URL: http://dx.doi.org/10.1016/S0168-9002(99)00800-1

Abstract

This paper presents results on the measurement of the cluster shapes, resolution and charge collection efficiency of a double-sided silicon microstrip detector after irradiation with 24 GeV protons to a fluence of 3.5 x 10(14) p/cm(2) and operated at cryogenic temperatures. An empirical model is presented which describes the expected cluster shapes as a function of depletion depth, and is shown to agree with the data. It is observed that the clusters on the p-side broaden if the detector is under-depleted, leading to a degradation of resolution and efficiency. The model is used to make predictions for detector types envisaged for the LHC experiments. The results also show that at cryogenic temperature the charge collection efficiency varies depending on the operating conditions of the detector and can reach values of 100% at unexpectedly low bias voltage. By analysing the cluster shapes it is shown that these variations are due to changes in depletion depth. This phenomenon, known as the "Lazarus effect", can he related to similar recent observations on diode behaviour.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s):Bell, Dr William and Parkes, Dr Christopher
Authors: Borer, K, Janos, S., Palmieri, V.G., Buytaert, J., Chabaud, V., Chochula, P., Collins, P., Dijkstra, H., Niinikoski, T.O., Lourenco, C., Parkes, C., Saladino, S., Ruf, T., Granata, V., Pagano, S., Vitobello, F., Bell, W., Bartalini, P., Dormond, O., Frei, R., Casagrande, L., Bowcock, T., Barnett, I.B.M., Da Via, C., Konorov, I., Paul, S., Schmitt, L., Ruggiero, G., Stavitski, I., and Esposito, A.
Subjects:Q Science > QC Physics
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

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