The aim of this work is to calculate the dose released by galactic cosmic rays (GCRs) and solar energetic particles (SEPs) in the polarimeter of the Multi Element Telescope for Imaging and Spectroscopy (METIS) coronagraph [1] aboard the Solar Orbiter. This investigation is performed with a Monte Carlo method by considering the role of SEP events of proper intensity at a heliocentric distance from the Sun averaged along the spacecraft orbit. Our approach can be extended to other space missions reaching short distances from the Sun, such as Solar Probe Plus. This study indicates that the deposited dose on the whole set of polarimeter lenses and filters during ten years of the Solar Orbiter mission is of about 2000 Gy. For cerium treated lenses, a dose of 106 Gy of gamma radiation from a 60Co source causes a few percent transmittance loss.
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25 March 2016
SOLAR WIND 14: Proceedings of the Fourteenth International Solar Wind Conference
22–26 June 2015
Weihai, China
Research Article|
March 25 2016
Metis aboard the Solar Orbiter space mission: Doses from galactic cosmic rays and solar energetic particles
Daniele Telloni;
Daniele Telloni
1
INAF-Astrophysical Observatory of Torino
, Via Osservatorio 20, 10025 Pino Torinese, Italy
2
INFN Section in Florence
, Via Giovanni Sansone 1, 50019 Sesto Fiorentino, Italy
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Michele Fabi;
Michele Fabi
1
INAF-Astrophysical Observatory of Torino
, Via Osservatorio 20, 10025 Pino Torinese, Italy
3
University of Urbino
, Department of Pure and Applied Sciences, Via Santa Chiara 27, 61029 Urbino, Italy
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Catia Grimani;
Catia Grimani
2
INFN Section in Florence
, Via Giovanni Sansone 1, 50019 Sesto Fiorentino, Italy
3
University of Urbino
, Department of Pure and Applied Sciences, Via Santa Chiara 27, 61029 Urbino, Italy
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Ester Antonucci
Ester Antonucci
a)
1
INAF-Astrophysical Observatory of Torino
, Via Osservatorio 20, 10025 Pino Torinese, Italy
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a)
Principal Investigator of METIS (http://metis.oato.inaf.it)
AIP Conf. Proc. 1720, 100001 (2016)
Citation
Daniele Telloni, Michele Fabi, Catia Grimani, Ester Antonucci; Metis aboard the Solar Orbiter space mission: Doses from galactic cosmic rays and solar energetic particles. AIP Conf. Proc. 25 March 2016; 1720 (1): 100001. https://doi.org/10.1063/1.4943856
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