Accession Number : AD0712344

Title :   THE PENUMBRA AND THE CHANGES IN THE EFFECTIVE RIGIDITY OF THE GEOMAGNETIC COSMIC RAY CUTOFF WITH CHANGES OF THE PRIMARY SPECTRUM IN A QUIESCENT GEOMAGNETIC FIELD,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Dorman,L. I. ; Gusshina,R. T.

Report Date : 21 AUG 1970

Pagination or Media Count : 21

Abstract : The calculation is presented for the effective rigidity of the geomagnetic cutoff in the presence of the penumbra and the change in this rigidity according to detection of various components at geomagnetic latitudes of 30, 40, and 50 degrees. The calculations are made for satellite altitudes and in the atmosphere as follows: for the neutron component at an altitude of 10 km, at mountain levels, and at sea level; for the hard component at an altitude of 10 km, at sea level and underground at the depths of 3 and 7 meters water equivalent. Also found are the expected changes in the effective cutoff rigidity of various instruments for a quiescent geomagnetic field when primary variations occur as a result of chromospheric eruptions or various types of cosmic ray modulation effects. (Author)

Descriptors :   (*COSMIC RAYS, *GEOMAGNETISM), SOLAR WIND, PROTONS, ELECTRONS, PERIODIC VARIATIONS, SOLAR FLARES, MATHEMATICAL MODELS, PENETRATION

Subject Categories : Astrophysics
      Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE