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Proceedings Paper

The front-end electronics of the LSPE-SWIPE experiment
Author(s): F. Fontanelli; M. Biasotti; A. Bevilacqua; F. Siccardi
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Paper Abstract

The SWIPE detector of the Ballon Borne Mission LSPE (see e.g. the contribution of P. de Bernardis et al. in this conference) intends to measure the primordial ’B-mode’ polarization of the Cosmic Microwave Background (CMB). For this scope microwave telescopes need sensitive cryogenic bolometers with an overall equivalent noise temperature in the nK range. The detector is a spiderweb bolometer based on transition edge sensor and followed by a SQUID to perform the signal readout. This contribution will concentrate on the design, description and first tests on the front-end electronics which processes the squid output (and controls it). The squid output is first amplified by a very low noise preamplifier based on a discrete JFET input differential architecture followed by a low noise CMOS operational amplifier. Equivalent input noise density is 0.6 nV/Hz and bandwidth extends up to at least 2 MHz. Both devices (JFET and CMOS amplifier) have been tested at liquid nitrogen. The second part of the contribution will discuss design and results of the control electronics, both the flux locked loop for the squid and the slow control chain to monitor and set up the system will be reviewed.

Paper Details

Date Published: 29 July 2016
PDF: 6 pages
Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 990456 (29 July 2016); doi: 10.1117/12.2232859
Show Author Affiliations
F. Fontanelli, Istituto Nazionale di Fisica Nucleare (Italy)
Univ. di Genova (Italy)
M. Biasotti, Istituto Nazionale di Fisica Nucleare (Italy)
Univ. di Genova (Italy)
A. Bevilacqua, Istituto Nazionale di Fisica Nucleare (Italy)
F. Siccardi, INFN - Sezione di Genova (Italy)

Published in SPIE Proceedings Vol. 9904:
Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave
Howard A. MacEwen; Giovanni G. Fazio; Makenzie Lystrup; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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