Observations of low energy /approximately 0.5 MeV/ trapped protons with Injun 4

Low energy trapped proton observations with Injun 4 satellit

The radial gradient of interplanetary radiation measured by Mariners 4 and 5

Interplanetary radiation radial gradient measured from Mariners 4 and

Interplanetary energetic particle observations of the March 1989 events

The IMP-8 spacecraft placed in an elongated orbit of approximately R(sub E) x R(sub E) orbit around the Earth was the only monitor of the energetic particle environment of the near interplanetary space during the period of the solar particle events associated with the Active Region 5395 in March 1989. Measurements of energetic ion and electron intensities were obtained in a series of channels within the energy range: 0.3 to 440 MeV for photons, 0.6 to 52 MeV/nuc for alpha particles, 0.7 to 3.3 MeV/nuc for nuclei with Z greater than or equal to 3, 3 to 9 MeV/nuc with Z greater than or equal to 20, and 0.2 to 2.5 MeV for electrons. The responses of selected energy channels during the period 5 to 23 March 1989 are displayed. It is clearly noted that the most prominent energetic ion intensity enhancements in that time interval were associated with the interplanetary shock wave of March 13 (07:42 UT) as well as that of March 8 (17:56 UT), which have distinct particle acceleration signatures. These shock waves play a major role in determining the near Earth energetic ion intensities during the above period by accelerating and modulating the ambient solar energetic particle population, which was already present in high intensities in the interplanetary medium due to the superposition of a series of solar flare particle events originating in AR 5395. The differential ion intensities at the lowest energy channel of the CPME experiment, which were associated with the March 13 shock wave, reached the highest level in the life of the IMP-8 spacecraft at this energy. At high energies, the shock associated intensity peak was smaller by less than a factor of 3 than the maxima of solar flare particle intensities from some other major flares, in particular from those with sites well connected to the Earth's magnetic flux tubes

Changes in the Distribution of Low Energy Trapped Protons Associated with the 17 Apr. 1965, Magnetic Storm

Temporal variations of geomagnetically trapped low energy protons recorded by Injun 4 during 17 Apr. 1965 magnetic stor

Acceleration of ions and electrons to near-cosmic ray energies in a perpendicular shock: The January 6, 1978 event

Acceleration of energetic ions to approx 200 MeV and electrons to approx 2 MeV were detected by the Low Energy Charged Particle (LECP) instrument on Voyager 2 in association with a quasiperpendicular shock of theta sub Bn - 87.5 deg at 1.9 AU. The measurments, obtained at a time resolution of approx. 1.2 sec, reveal structure of the energetic particle intensity enhancements down to a scale of the order of the particle gyroradius, and suggest that acceleration takes place within a gyrodiameter of the shock. The observations are consistent with the prediction of the shock drift acceleration (SDA) mechanism. The absence of any fluctuations in the magnetic field during the shock passage suggest that turbulence is not essential to the shock acceleration process in the interplanetary medium

Observations of protons in the magnetosphere with Mariner IV

Mariner IV low energy proton measurements of magnetospher

Observation of about 500 KeV protons in interplanetary space with Mariner IV

Mariner IV observations of protons in interplanetary spac

Geomagnetically trapped alpha particles

Geomagnetically trapped alpha particles from Injun IV satellite measurement

Impulsive emission of approximately 40 KeV electrons from the sun

Impulsive emission of high energy electrons from sun and diffusive propagation through interplanetary medium observed by Mariner IV PARTICLE detector

Observations of the solar particle event of 5 to 12 February 1965 with Mariner IV AND Injun IV

Solar energetic particle intensities obtained with Mariner IV and Injun IV during 5-12 February 1965 cosmic ray even