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Sensors 2012, 12(4), 4447-4465; doi:10.3390/s120404447

Gamma Irradiation of Magnetoresistive Sensors for Planetary Exploration

Space Programs & Space Sciences Department of the Spanish National Institute of Aerospace Technology (INTA), 28850, Torrejón de Ardoz, Madrid, Spain
* Author to whom correspondence should be addressed.
Received: 28 February 2012 / Revised: 12 March 2012 / Accepted: 19 March 2012 / Published: 2 April 2012
(This article belongs to the Section Physical Sensors)
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A limited number of Anisotropic Magnetoresistive (AMR) commercial-off-the-shelf (COTS) magnetic sensors of the HMC series by Honeywell, with and without integrated front-end electronics, were irradiated with gamma rays up to a total irradiation dose of 200 krad (Si), following the ESCC Basic Specification No. 22900. Due to the magnetic cleanliness required for these tests a special set-up was designed and successfully employed. Several parameters of the sensors were monitored during testing and the results are reported in this paper. The authors conclude that AMR sensors without front-end electronics seem to be robust against radiation doses of up to 200 krad (Si) with a dose rate of 5 krad (Si)/hour and up to a resolution of tens of nT, but sensors with an integrated front-end seem to be more vulnerable to radiation.
Keywords: magnetic devices; radiation effects in devices; Gamma ray effects; space applications; space radiation effects magnetic devices; radiation effects in devices; Gamma ray effects; space applications; space radiation effects
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Sanz, R.; Fernández, A.B.; Dominguez, J.A.; Martín, B.; Michelena, M.D. Gamma Irradiation of Magnetoresistive Sensors for Planetary Exploration. Sensors 2012, 12, 4447-4465.

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