Intensity oscillation of low energy solar particles observed on the IMP 7 satellite

Solar flare particles in the energy range from 125 to 160 KeV per charge were detected and analyzed by an electrostatic deflection vs energy instrument on board the Explorer 47 (IMP 7) satellite. On the basis of a harmonic analysis of the counting rates, an approximating formula is obtained for the fluctuation of the particle flux. The oscillation frequency varies from flare to flare and is of the order of approximately .002 per sec. The physical implications of the finding are discussed.