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Record 70 of 5624
High-energy particle production in solar flares (SEP, gamma-ray and neutron emissions). [solar energetic particles]
Author and Affiliation:
Chupp, E. L.(New Hampshire, University, Durham, United States)
Abstract: Electrons and ions, over a wide range of energies, are produced in association with solar flares. Solar energetic particles (SEPs), observed in space and near earth, consist of electrons and ions that range in energy from 10 keV to about 100 MeV and from 1 MeV to 20 GeV, respectively. SEPs are directly recorded by charged particle detectors, while X-ray, gamma-ray, and neutron detectors indicate the properties of the accelerated particles (electrons and ions) which have interacted in the solar atmosphere. A major problem of solar physics is to understand the relationship between these two groups of charged particles; in particular whether they are accelerated by the same mechanism. The paper reviews the physics of gamma-rays and neutron production in the solar atmosphere and the method by which properties of the primary charged particles produced in the solar flare can be deduced. Recent observations of energetic photons and neutrons in space and at the earth are used to present a current picture of the properties of impulsively flare accelerated electrons and ions. Some important properties discussed are time scale of production, composition, energy spectra, accelerator geometry. Particular attention is given to energetic particle production in the large flare on June 3, 1982.
Publication Date: Jan 01, 1987
Document ID:
19880033400
(Acquired Nov 28, 1995)
Accession Number: 88A20627
Subject Category: SOLAR PHYSICS
Document Type: Journal Article
Publication Information: Physica Scripta (ISSN 0281-1847); T18; 5-19
Publisher Information: Sweden
Contract/Grant/Task Num: NASA ORDER S-14513-D; NAG5-720
Financial Sponsor: NASA; United States
Organization Source: New Hampshire Univ.; Durham, NH, United States
Description: 15p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ENERGETIC PARTICLES; GAMMA RAYS; NEUTRON EMISSION; PARTICLE PRODUCTION; SOLAR FLARES; SOLAR TERRESTRIAL INTERACTIONS; ENERGY SPECTRA; PARTICLE ACCELERATION; SATELLITE OBSERVATION; SOLAR ATMOSPHERE; SOLAR FLUX
Imprint And Other Notes: (SCOSTEP, COSPAR, IAGA, et al., International Solar-Terrestrial Physics Symposium, 6th, Toulouse, France, June 30-July 5, 1986) Physica Scripta (ISSN 0281-1847), vol. T18, 1987, p. 5-19. USAF-BMFT-supported research.
Miscellaneous Notes: USAF-BMFT-supported research
Availability Source: Other Sources
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