Radiation tolerant isolation amplifiers for temperature measurement

Abstract

Abstract: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 7-8·10¹²n/cm², which was 50 % higher than the expected dose in the LHC. Radiation Tolerant Isolation Amplifiers for Temperature Measurement

Irradiation of electronic components and circuits at the Portuguese Research Reactor: Lessons learned

“…Fig. 6 shows the differential hardness parameter as function of neutron energy inside the prolongation of the irradiation facility, at the point closest to the core of the reactor [11]. The main contribution for the hardness parameter comes from neutrons in the 0.2-8 MeV energy interval.…”