For lunar exploration mission design, radiation risk assessments require the understanding of future space radiation environments in support of resource management decisions, operational planning, and a go/no-go decision. The future GCR flux was estimated as a function of interplanetary deceleration potential, which was coupled with the estimated neutron monitor rate from the Climax monitor using a statistical model. A probability distribution function for solar particle event (SPE) occurrence was formed from proton fluence measurements of SPEs occurred during the past 5 solar cycles (19-23). Large proton SPEs identified from impulsive nitrate enhancements in polar ice for which the fluences are greater than 2 10(exp 9) protons/sq cm for energies greater than 30 MeV, were also combined to extend the probability calculation for high level of proton fluences. The probability with which any given proton fluence level of a SPE will be exceeded during a space mission of defined duration was then calculated. Analytic energy spectra of SPEs at different ranks of the integral fluences were constructed over broad energy ranges extending out to GeV, and representative exposure levels were analyzed at those fluences. For the development of an integrated strategy for radiation protection on lunar exploration missions, effective doses at various points inside a spacecraft were calculated with detailed geometry models representing proposed transfer vehicle and habitat concepts. Preliminary radiation risk assessments from SPE and GCR were compared for various configuration concepts of radiation shelter in exploratory-class spacecrafts.


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    Titel :

    Space Radiation Risk Assessment for Future Lunar Missions


    Beteiligte:

    Kongress:

    International Congress of Space Radiation Research ; 2007 ; San Francisco, CA, United States


    Erscheinungsdatum :

    2007-07-12


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Minimizing Astronauts' Risk from Space Radiation during Future Lunar Missions

    Kim, Myung-Hee Y. / Hayat, Mathew / Nounu, Hatem N. et al. | NTRS | 2007


    Impact Risk Assessment for Lunar Missions

    Bunte, K.D. / Miller, A. / Hake, P. | British Library Conference Proceedings | 2013


    Future lunar surface missions.

    Schaffer, A. / Wagner, H. | NTRS | 1967


    Future lunar surface missions.

    Schaffer, A. / Wagner, H. | NTRS | 1967


    Improvement of Risk Assessment from Space Radiation Exposure for Future Space Exploration Missions

    Ponomarev, A. L. / Cucinotta, F. A. / Hussein, H. et al. | SAE Technical Papers | 2007