Rapid acceleration of energetic particles in the 1982 February 8 solar flare
Technical Report
·
OSTI ID:6594760
Hard x-ray and gamma-ray measurements of the 1982 February 8 (about 1250 UT) solar flare made with spectrometers aboard the ISEE 3 and SMM spacecraft show that bursts of photons from about 40 keV to about 40 MeV are coincident to within + or - 1 s. This indicates that the acceleration of particles to relativistic velocities can occur promptly (within about 1 s). As far as the energetic particles interacting at the Sun are concerned, the two-phase process, which requires several minutes for particle acceleration to relativistic velocities, cannot account for the present gamma-ray observations. Even the two-step acceleration process, which is assumed to occur in a small magnetic loop, is severely constrained by the present observations.
- Research Organization:
- New Hampshire Univ., Durham (USA). Dept. of Physics
- OSTI ID:
- 6594760
- Report Number(s):
- AD-A-199486/2/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
BEAMS
CHARGED-PARTICLE TRANSPORT
GAMMA SPECTROMETERS
MAGNETIC FIELDS
MAIN SEQUENCE STARS
MEASURING INSTRUMENTS
NUCLEON BEAMS
PARTICLE BEAMS
PARTICLES
PROTON BEAMS
RADIATION TRANSPORT
SOLAR ACTIVITY
SOLAR FLARES
SPECTROMETERS
STARS
SUN
VELOCITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
BEAMS
CHARGED-PARTICLE TRANSPORT
GAMMA SPECTROMETERS
MAGNETIC FIELDS
MAIN SEQUENCE STARS
MEASURING INSTRUMENTS
NUCLEON BEAMS
PARTICLE BEAMS
PARTICLES
PROTON BEAMS
RADIATION TRANSPORT
SOLAR ACTIVITY
SOLAR FLARES
SPECTROMETERS
STARS
SUN
VELOCITY