Radiation tolerant isolation amplifiers for temperature measurement

Yi Zong, Francisco J. Franco, Juan A. de Agapito, Ana C. Fernandes, José G. Marques

Research output: Contribution to journalJournal articleResearchpeer-review


This paper concentrates on the selection of radiation tolerant isolation amplifiers, which are suitable for the signal conditioners for
cryogenic system in the Large Hadron Collider (LHC). The evolution and the results of different commercial isolation amplifiers’
parameters under neutron and gamma radiation are presented. In most cases, the tested isolation amplifiers’ input offset voltage, bias
currents and output offset voltage hardly changed during the radiation. The DC gain in input stage was only affected for some isolation
amplifiers with a small open loop gain. Transmission coefficient showed decrease for all the tested isolation amplifiers. Also, the DC
output voltage increased and the ripple voltage decreased for all the build-in isolated regulators. In addition, results on 1B41 signal
conditioner showed that it was tolerant to 7–81012 n/cm2, which was 50% higher than the expected dose in the LHC.
r 2006 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Pages (from-to)869–876
Publication statusPublished - 2006
Externally publishedYes


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