First Assessment of Radiation Effects on a Biochip Dedicated to Life Detection - Study of a Mission to Mars Case -

Details First Assessment of Radiation Effects on a Biochip Dedicated to Life Detection - Study of a Mission to Mars Case - First Assessment of Radiation Effects on a Biochip Dedicated to Life Detection - Study of a Mission to Mars Case -

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.4901l&link_type=abstract

American Astronomical Society, DPS meeting #40, #49.01; Bulletin of the American Astronomical Society, Vol. 40, p.484

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Detecting life in the Solar System is one of the great challenges of new upcoming space missions. It implies to send new sophisticated devices to bodies of interest (like Mars) to try to perform in situ measurements which will give hints of the presence, or lack, of organic matter. One of those devices could be a miniaturized biological sensitive system called biochip that several teams (including ours) are developing for space applications (Le Postollec et al. 2007, Maule et al. 2005, Parro et al. 2007, Sims et al. 2005, Steele et al. 2001).
The main concern is to ensure the survival of such a device during a full space mission. Space radiation appears clearly as a critical parameter requiring a detailed investigation.
We will present results of our simulation work to define the radiation environment a biochip would face during a typical mission to Mars: main particles fluxes and ionizing doses in the biochip have been assessed (Le Postollec et al. 2008a) tanks to Monte-Carlo codes based on the Geant4 computing tool.
We will also detail two irradiation experiments which have been performed consequently to these simulation results. Biological elements (particularly antibodies) have been irradiated under neutrons and protons laboratory beam lines in order to study their resistance to such particles (Le Postollec et al. 2008b).
References:
- Le Postollec et al. (2007) SF2A Proceedings.
- Le Postollec et al. (2008a) Astrobiology, submitted.
- Le Postollec et al. (2008b) In preparation.
- Maule et al. (2005) Lunar and Planetary Science 36, 1921.
- Parro et al. (2007) Space Science Reviews 135, 293-311.
- Sims et al. (2005) Planetary and Space Science 53, 781-91
- Steele et al. (2001) Lunar and Planetary Science 32, 1684

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