Propagation and generation of low-energy solar protons according to measurements of automatic space sondes.
Abstract
Low-energy proton data obtained in anisotropy measurements carried out on board several spacecraft of the Venera series are analyzed, assuming a temporal and spatial nature of the variations. It is shown that the transport mean free path is a highly variable quantity; at the onset of intensity increases, the transport mean free path decreases to below 0.1 AU, reaching peak values of more than 1.0 AU at maximum intensity. Its mean value is a function of solar activity (decreasing with increasing activity). According to the measurements on board Venera-7 and Mars-2, the transport mean free path of 5-MeV protons is less by factors of 2 to 3 than that of 1-MeV protons.
- Publication:
-
Akademiia Nauk SSSR Izvestiia Seriia Fizicheskaia
- Pub Date:
- September 1974
- Bibcode:
- 1974IzSSR..38.1849G
- Keywords:
-
- Particle Production;
- Proton Flux Density;
- Solar Cosmic Rays;
- Solar Protons;
- Spaceborne Astronomy;
- Anisotropy;
- Data Reduction;
- Mars 2 Spacecraft;
- Mean Free Path;
- Satellite Observation;
- Solar Activity Effects;
- Solar Wind;
- Venera Satellites;
- Solar Physics