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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 3.0).

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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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