SOLAR PARTICLE EVENT DOSE DISTRIBUTIONS - PARAMETERIZATION OF DOSE-TIME PROFILES

Calculations of total dose and dose equivalent as a function of time s ince the start of the event are presented for four of the major solar particle events that occurred during the period from August to Decembe r 1989. Results are presented for exposures to the skin, ocular lens a nd bone marrow shielded by a nominal thickness of aluminum shielding, comparable to that provided by a spacesuit. The calculated curves of o rgan dose and dose equivalent versus time are parameterized using a We ibull functional form for the fitting equation. The fitting parameters are determined using least squares regression techniques. These resul ts provide a useful starting point for the development of methods to p redict the cumulative doses and times to reach various dose limits fro m a limited number of dose measurements early in a solar particle even t. (C) 1998 Elsevier Science Ltd. All rights reserved.