Development and Testing of in situ Materials for Human Exploration of Mars

Abstract

Interplanetary space radiation poses a serious health hazard in long-term manned space missions. Natural Martian surface materials are evaluated for their potential use as radiation shields for manned Mars missions. The modified radiation fluences behind various kinds of Martian rocks and regolith are determined by solving the Boltzmann equation using NASA Langley’s HZETRN code along with the 1977 Solar Minimum galactic cosmic ray environmental model. To make structural shielding composite materials from constituents of the Martian atmosphere and from Martian regolith for Martian surface habitats, schemes for synthesizing polyimide from the Martian atmosphere and for processing Martian regolith/polyimide composites are proposed. Theoretical predictions of the shielding properties of these composites are computed to assess their shielding effectiveness. Adding high-performance polymer binders to Martian regolith to enhance the structural properties also enhances the shielding properties of these composites because of the added hydrogenous constituents. Laboratory testing of regolith simulant/polyimide composites is planned in order to validate this prediction and also to measure various structural properties.

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References

[1] Hoffman S J and Kaplan D I (eds) 1997 Human Exploration of Mars: The Reference Mission of the NASA Mars Exploration Study Team NASA-SP 6107-6107

[2] National Council on Radiation Protection and Measurements 1989

Guidance on radiation received in space activities

NCRP Report No 98

[3] Badhwar G D , Cucinotta F A and O’Neill P M 1993

Depth–dose equivalent relationship for cosmic rays at various solar minima

Radiat. Res. 134 9–15

[4] Meyer C (compiler) 1996 Mars Meteorite Compendium—1996 NASA JSC No 27672

[5] Smith R E and West G S (compilers) 1983 Space and Planetary Environment Criteria Guidelines for Use in Space Vehicle Development, 1982 Revision vol 1, NASA TM-82478

[6] International Commission for Radiological Protection 1991 1990 Recommendations of the International Commission on Radiobiological Protection (ICRP Publication 60) (Oxford: Pergamon)

[7] Wilson J W et al 1993 Biological Effects and Physics of Solar and Galactic Cosmic Radiation ed C E Swenberg , G Horneck and E G Stassinopoulos (New York: Plenum) part B, pp 295–338

[8] Kim M Y et al 1994 Performance Study of Galactic Cosmic Ray Shield Materials NASA-TP 3473-3473

[9] Simonsen L C , Nealy J E , Townsend L W and Wilson J W 1990 Radiation Exposure for Manned Mars Surface Missions NASA-TP 2979-2979

10.

[10] Adams J H Jr, Silberberg R and Tsao C H 1981 NRL memo US Navy Report 4506-Pt. I

11.

[11] Wilson J W et al 1995 HZETRN: Description of a Free-Space Ion and Nucleon Transport and Shielding Computer Program NASA-TP 3495-3495

12.

[12] Cucinotta F A , Townsend L W , Wilson J W , Shinn J L , Badhwar G D and Dubey R R 1996 Adv. Space Res. 17 77–86

13.

[13] Gertsch L and Gertsch R 1997 Shielding Strategies for Human Space Exploration ed J W Wilson , J Miller , A Konradi and F A Cucinotta NASA-CP 3360, pp 327–364

14.

[14] Schimmerling W et al 1996 Adv. Space Res. 17 31-31

15.

[15] Simonsen L C , Schimmerling W , Wilson J W and Thibeault S A 1997 Construction Technologies for Lunar Base: Prefabricated Versus In Situ Materials for Lunar Base Space Radiation Shielding ed J W Wilson , J Miller , A Konradi and F A Cucinotta NASA-CP 3360, pp 297–326

16.

[16] Sullivan T D et al 1995 J. Propulsion Power 11 1056-1056

17.

[17] Bryant R G 1994 US Patent Specification LAR 15205-1

18.

[18] Soichi E I et al 1995 SAMPE Int. Symp. 40 11-11

19.

[19] Bryant R G 1996 Proc. 19th Annual Meeting of the Adhesion Society p 36-36

20.

[20] Bryant R G and Buchman A 1997 Proc. 20th Annual ‘Anniversary’ Meeting of the Adhesion Society vol 20, p 335-335

21.

[21] Bryant R G 1994 Polym. Prep. 35 517-517

22.

[22] Angelovici M M et al 1998 Mater. Lett. 36 254-254

23.

[23] National Academy of Science 1996 Radiation Hazards to Crews on Interplanetary Missions (NAS Press)

24.

[24] Wilson J W et al 1995 Health Phys. 68 50-50