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Fracture processes studied in CRESST
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Åström, J., Pröbst, F., Di Stefano, P. C. F., Stodolsky, L., Timonen, J., Bucci, C., Cooper, S., Cozzini, C., Feilitzsch, F. v., Kraus, H., Marchese, J., Meier, O., Nagel, U., Ramachers, Y., Seidel, W., Sisti, M., Uchaikin, S. and Zerle, L. (2006) Fracture processes studied in CRESST. In: 11th International Workshop on Low Temperature Detectors, University of Tokyo, Tokyo, Japan, Jul 31-Aug 05, 2005. Published in: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol.559 (No.2). pp. 754-756. doi:10.1016/j.nima.2005.12.127 ISSN 0168-9002.
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Official URL: http://dx.doi.org/10.1016/j.nima.2005.12.127
Abstract
In the early stages of running of the CRESST dark matter search with sapphire crystals as detectors, an unexpectedly high rate of signal pulses appeared. Their origin was finally traced to fracture events in the sapphire due to the very tight clamping of the detectors. During extensive runs the energy and time of each event was recorded, providing large data sets for such phenomena. We believe this is the first time that the energy release in fracture has been accurately measured on a microscopic event-by-event basis. The energy distributions appear to follow a power law, dN/dE proportional to E-beta, similar to the Gutenberg-Richter power law for earthquake magnitudes, and after appropriate translation, with a similar exponent. In the time domain, the autocorrelation function shows time correlations lasting for substantial parts of an hour. Some remarks are made concerning the possible role Of Such mechanical stress release processes in the noise of sensitive cryodetectors. (c) 2006 Elsevier B.V. All rights reserved.
Item Type: | Conference Item (Paper) | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | ||||
Publisher: | Elsevier BV | ||||
ISSN: | 0168-9002 | ||||
Official Date: | 15 April 2006 | ||||
Dates: |
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Volume: | Vol.559 | ||||
Number: | No.2 | ||||
Number of Pages: | 3 | ||||
Page Range: | pp. 754-756 | ||||
DOI: | 10.1016/j.nima.2005.12.127 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | 11th International Workshop on Low Temperature Detectors | ||||
Type of Event: | Workshop | ||||
Location of Event: | University of Tokyo, Tokyo, Japan | ||||
Date(s) of Event: | Jul 31-Aug 05, 2005 |
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