TY - JOUR
T1 - Low-energy cosmic-ray modulation related to observed interplanetary magnetic field irregularities
AU - Gloeckler, G.
AU - Jokipii, J. R.
PY - 1966
Y1 - 1966
N2 - The diffusion coefficient describing the motion of cosmic-ray particles in the interplanetary magnetic field is determined from the power spectrum of magnetic irregularities observed on space probes, and is found to be proportional to R (R=particle magnetic rigidity, =particle velocity). Near minimum solar activity, only this dependence of the diffusion coefficient on R and can account for the observed long-term intensity variations of cosmic-ray protons and helium nuclei down to 10 MeV per nucleon in energy. Thus, the motion of cosmic rays in interplanetary space may be quantitatively related to the observed magnetic field.
AB - The diffusion coefficient describing the motion of cosmic-ray particles in the interplanetary magnetic field is determined from the power spectrum of magnetic irregularities observed on space probes, and is found to be proportional to R (R=particle magnetic rigidity, =particle velocity). Near minimum solar activity, only this dependence of the diffusion coefficient on R and can account for the observed long-term intensity variations of cosmic-ray protons and helium nuclei down to 10 MeV per nucleon in energy. Thus, the motion of cosmic rays in interplanetary space may be quantitatively related to the observed magnetic field.
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U2 - 10.1103/PhysRevLett.17.203
DO - 10.1103/PhysRevLett.17.203
M3 - Article
AN - SCOPUS:36049055600
SN - 0031-9007
VL - 17
SP - 203
EP - 207
JO - Physical review letters
JF - Physical review letters
IS - 4
ER -