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Radiation Assessment Detector (RAD). D.M. Hassler, A. Posner, M. Bullock, S. Rafkin, D. Grinspoon (Southwest Research Institute) R.F. Wimmer-Schweingruber, R. Beaujean, S. Burmeister, R. Muller-Mellin, S. Bottcher (Univ. of Kiel) G. Reitz (DLR/Koln) F. Cucinotta, T. Cleghorn (NASA/JSC).

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slide1

Radiation Assessment Detector (RAD)

D.M. Hassler, A. Posner, M. Bullock, S. Rafkin, D. Grinspoon (Southwest Research Institute)

R.F. Wimmer-Schweingruber, R. Beaujean, S. Burmeister, R. Muller-Mellin, S. Bottcher (Univ. of Kiel)

G. Reitz (DLR/Koln)

F. Cucinotta, T. Cleghorn (NASA/JSC)

validating radiation transport codes and models
Validating Radiation Transport Codes and Models

Penetration Depths for Various Energy Particles.

Secondary Particle Production from Galactic Cosmic Rays

slide5

Atmospheric Shielding at Mars:

Strong dependence on atmospheric column mass

astronaut safety determining the radiation dose rate for humans on mars
Astronaut Safety: Determining the Radiation Dose Rate for Humans on Mars

GCRs produce near-constant background flux of radiation, modulated by solar cycle.

Composed mostly H+ and He2+, but heavy ions contribute disproportionately to the Dose Equivalent due to their high quality factor, Q. (Wilson et al. 1997)

slide10

Preparation for Human Exploration of Mars: Astronaut Safety Requires Monitoring Certain Particle Species

slide12

RAD Instrument Overview

RAD proto-type (top) being tested at Brookhaven National Lab (bottom)

rad species identification approach distinguish ion species using de dx vs e method
RAD Species Identification Approach:Distinguish Ion Species using dE/dx vs E method

Ion kinetic energy deposited per unit length:

Bethe-Bloch Equation:

Ion Identification:

substitute v2 with:

Thus: