Title :
Model for Cumulative Solar Heavy Ion Energy and Linear Energy Transfer Spectra
Author :
Xapsos, M.A. ; Stauffer, C. ; Jordan, T. ; Barth, J.L. ; Mewaldt, R.A.
Author_Institution :
NASA Goddard Space Flight Center, Greenbelt
Abstract :
A probabilistic model of cumulative solar heavy ion energy and LET spectra is developed for spacecraft design applications. Spectra are given as a function of confidence level, mission time period during solar maximum and shielding thickness. It is shown that long-term solar heavy ion fluxes exceed galactic cosmic ray fluxes during solar maximum for shielding levels of interest. Cumulative solar heavy ion fluences should therefore be accounted for in single event effects rate calculations and in the planning of space missions.
Keywords :
aerospace instrumentation; ion beam effects; solar cosmic ray particles; space vehicles; cumulative solar heavy ion energy; linear energy transfer spectra; long-term solar heavy ion fluxes; probabilistic model; space missions; spacecraft design; Energy exchange; Integrated circuit modeling; NASA; Phased arrays; Predictive models; Probability distribution; Protons; Psychology; Space technology; Space vehicles; Cumulative fluence; solar heavy ion; solar particle event;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2007.910850
