@inproceedings{139ed711acc94fae9fc5d15320df579e,
title = "Squid Readout of Cryogenic Particle Detectors",
abstract = "Cryogenic radiation and particle detectors are widely investigated nowadays. Their high intrinsic energy sensitivity makes them suitable for a wide range of applications. In order to take full advantage of the sensitivity of these newly developed cryogenic detectors, in general current sensors are needed with a white noise level of the order of 10-12 A/√HZ and a bandwidth larger than 1 MHz. We applied a Double Relaxation Oscillation SQUID (DROS) as a low-noise current preamplifier for measuring the current-voltage characteristics of a superconducting Nb/Al-AlOx/Al/Nb Josephson tunnel junction. A white current noise level smaller than 2 pA/√Hz was obtained. Thanks to the large flux-to-voltage transfer of a DROS (typically 1 mV/{\O} o), no modulation techniques are required, allowing simple room-temperature flux locked loop electronics. Since the Josephson junction was voltage biased, no magnetic field had to be applied to suppress the Josephson supercurrent, which eliminates distortion of the subgap I-V characteristics by Fiske resonances. The measurements show that a DROS is a serious alternative for the high resolution readout of an X-ray spectrometer based on a superconducting tunnel junction.",
keywords = "Superconductivity, SQUID, Superconducting tunnel junction, Particle detector",
author = "A.W. Hamster and {van Duuren}, M.J. and G.C.S. Brons and J. Flokstra and H. Rogalla",
year = "1998",
month = apr,
day = "14",
doi = "10.1007/978-94-011-5010-1_45",
language = "English",
isbn = "978-94-010-6103-2",
series = "MESA monographs",
publisher = "Kluwer Academic Publishers",
pages = "281--285",
editor = "{van den Berg}, A. and P. Bergveld",
booktitle = "Sensor technology in the Netherlands - state of the art",
address = "Netherlands",
note = "Dutch Sensor Conference 1998 : Sensor Technology in the Netherlands: State of the Art ; Conference date: 02-03-1998 Through 03-03-1998",
}