Accession Number : AD0635204

Title :   FLARE HAZARDS AT SOLAR MINIMUM: DOSIMETRIC EVALUATION OF THE CLASS 2 FLARE OF FEBRUARY 5, 1965.

Corporate Author : NAVAL AEROSPACE MEDICAL INST PENSACOLA FLA

Personal Author(s) : Schaefer, Hermann J.

Report Date : 02 JUN 1966

Pagination or Media Count : 17

Abstract : The proton energy spectra for the Class 2 solar flare of February 5, 1965, as reported by a polar orbit satellite at five different times during the two-day period of enhanced intensity, are evaluated in terms of tissue depth doses for a semi-infinite slab with 0.1 g/sq cm shielding and for the Gemini and Apollo shield distribution. Maximum dose rates for the tissue surface are 714 millirads/hour, 81 and 11 millirads/hour, respectively. For the unidirectional beams, half value layers range from 2.6 to 5.6 millimeters of tissue. The integral flare dose over forty-four hours is 8.3 rads for the tissue surface behind 0.1 g/sq cm shielding. (Author)

Descriptors :   (*SOLAR FLARES, *RADIATION HAZARDS), (*SPACE FLIGHT, RADIATION HAZARDS), COSMIC RAYS, PROTONS, DOSE RATE, SHIELDING, SPACECRAFT COMPONENTS, SCIENTIFIC SATELLITES, POLAR ORBIT TRAJECTORIES, RADIATION MEASURING INSTRUMENTS, AEROSPACE MEDICINE

Subject Categories : Astrophysics
      Radiobiology
      Astronautics

Distribution Statement : APPROVED FOR PUBLIC RELEASE