Bolometers in magnetic field: Use of NTD Ge sensors

Year: 2007

Authors: Pasca E., Barucci M., Giuliani A., Olivieri E., Risegari L., Ventura G.

Autors Affiliation: Università di Firenze, INFN Sezione Firenze, Via G. Sansone 1, 50019 Sesto, F.no (FI), Italy; Università dell\’Insubria, Via Valleggio 11, 22100 Como, CO, Italy

Abstract: In this paper we report about the properties of Neutron Transmutation Doped (NTD) Ge in magnetic fields, focusing on the electrical conduction properties and magnetoresistance, in view of a use as sensors for bolometers in magnetic field. Samples of two different doping density were studied in magnetic field up to 5 T and temperature down to 65 mK. NTD sensors show a reproducible gigantic magnetoresistance that leads to an enhancement of their sensitivity to temperature variations. We discuss preliminarily the possible use of NTD sensors in magnetic field in particle detector developments, in particular for the KATRIN experiment.

Journal/Review: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT

Volume: 575 (3)      Pages from: 433  to: 438

KeyWords: Calorimeters; Doping (additives); Electric conductivity; Magnetic fields; Magnetoresistance; Temperature sensors, Electrical conduction properties; Neutron Transmutation Doped (NTD); Temperature sensitivity, Bolometers
DOI: 10.1016/j.nima.2007.02.092

Citations: 1
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