A study of days showing non-field-aligned diffusion vectors of cosmic ray diurnal anisotropy
Abstract
Days when significant non-field-aligned diffusion of cosmic ray diurnal anisotropy occurred during 1965-1968 are studied in detail. It is shown that whereas a large hour-to-hour and/or day-to-day variability of the interplanetary ecliptic magnetic field direction may favor non-field-aligned diffusion, it is not a necessary condition. Some characteristics of the diurnal anisotropy seem to indicate the possibility of more than one mechanism (sources and/or sinks) operating simultaneously, distorting the usually assumed simple picture of a radially outward convection and a field-aligned inward diffusion giving the observed vector along about 1800 LT in space.
- Publication:
-
Journal of Geophysical Research
- Pub Date:
- September 1975
- DOI:
- 10.1029/JA080i025p03509
- Bibcode:
- 1975JGR....80.3509K
- Keywords:
-
- Anisotropic Media;
- Cosmic Rays;
- Diurnal Variations;
- Particle Diffusion;
- Radiation Distribution;
- Frequency Distribution;
- Interplanetary Magnetic Fields;
- Magnetic Field Configurations;
- Vectors (Mathematics);
- Particles and Fields-Interplanetary Space: Cosmic rays;
- Particles and Fields-Interplanetary Space: Solar wind magnetic fields