The recovery of the charge collection efficiency (CCE) of irradiated silicon detectors by means of cryogenic cooling has entailed an increasing interest in the behavior of silicon detectors at cryogenic temperatures. We have measured the CCE of a silicon p-i-n diode detector previously irradiated with an equivalent fluence of 1 x 10(15) n/cm(2) neutrons of 1 MeV energy. The charge collection efficiency has been measured at 77 ii;. showing that the low-temperature operation considerably decreases the bias current. This is also the case when forward voltage bias is applied, which then becomes a suitable option. In this condition, the sample shows a charge collection efficiency in excess of 65% at 250 V corresponding to a most probable signal for a minimum ionizing particle of 21000e(-).
Irradiated silicon detectors operated at cryogenic temperatures: The Lazarus effect / V. Granata;W. H. Bell;P. Berglund;W. De Boer;E. Borchi;K. Borer;M. Bruzzi;S. Buontempo;L. Casagrande;V. Cindro;S. Chapuy;N. d'Ambrosio;C. Da Via;S. Devine;B. Dezillie;Z. Dimcovski;V. Eremin;A. Esposito;U. Gambardella;E. Grigoriev;E. Heijne;S. Heising;S. Janos;L. Jungermann;I. Konorov;Z. Li;C. Lourenco;M. Mikuz;T. O. Niinikoski;V. o'Shea;S. Pagano;V. G. Palmieri;S. Paul;S. Pirollo;K. Pretzl;G. Ruggiero;E. Sarnelli;K. Smith;R. Sonderegger;M. Valtonen;E. Verbitskaya;S. Watts;M. Zavrtanik. - In: PHILOSOPHICAL MAGAZINE. B. PHYSICS OF CONDENSED MATTER. STATISTICAL MECHANICS, ELECTRONIC, OPTICAL AND MAGNETIC PROPERTIES. - ISSN 1364-2812. - STAMPA. - 80:(2000), pp. 811-815. [10.1080/13642810008209787]
Irradiated silicon detectors operated at cryogenic temperatures: The Lazarus effect
BORCHI, EMILIO;BRUZZI, MARA;
2000
Abstract
The recovery of the charge collection efficiency (CCE) of irradiated silicon detectors by means of cryogenic cooling has entailed an increasing interest in the behavior of silicon detectors at cryogenic temperatures. We have measured the CCE of a silicon p-i-n diode detector previously irradiated with an equivalent fluence of 1 x 10(15) n/cm(2) neutrons of 1 MeV energy. The charge collection efficiency has been measured at 77 ii;. showing that the low-temperature operation considerably decreases the bias current. This is also the case when forward voltage bias is applied, which then becomes a suitable option. In this condition, the sample shows a charge collection efficiency in excess of 65% at 250 V corresponding to a most probable signal for a minimum ionizing particle of 21000e(-).
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