Rt. Gushchina et Ns. Shilova, Differences in proton fluxes near the earth from solar coronal mass ejections of different origin, GEOMAG AERO, 40(6), 2000, pp. 760-764
We investigate proton fluxes at energies E in the range from 50 keV to 100
MeV, which accompany coronal mass ejections (CME) during filament disappear
ances (five events) and during proton (two events) and non-proton (two even
ts) flares. We show that. when large H-alpha filaments disappear, the proto
n flux at E less than or equal to 1.8 MeV can be no weaker than the flux du
ring proton flares. In this case, however, the proton flux at E > 10 MeV du
ring filament disappearances is much lower than its value during proton eve
nts. We propose a method of determining differences in the spectra of proto
ns from CMEs of different origin from changes in the slope of the proton sp
ectrum during an event relative to the slope of the undisturbed background
proton spectrum near the event. The flattening of the proton spectrum with
increasing energy during proton events, which is absent during non-proton e
vents and filament disappearances, suggests that there is a peculiar mechan
ism for the emergence of energetic particles in proton flares.