Size of the X-Ray Kernel of the Large 1979 August 20 Solar Flare.

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Abstract:

At the time of the intense Class X5 solar flare on 1979 August 20, monochromatic small raster maps near 7 A were recorded of the flaring active region with 20-in. resolution FWHM by the SOLEX Solar X-Ray SpectrometerSpectroheliograph. From these maps, the spatial extent of the x-ray kernel during the rise of this flare at about 0912 UT was determined to be less than 28 inches. The electron density in the hot flare plasma was estimated to be above 10 to the 11th powercu cm. This is the first soft x-ray measurement of the angular size of such an intense flare.

Author(s):
Landecker, Peter B. ; Mckenzie, David L.
Author Organization(s):
AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS
Descriptive Note:
Interim rept.,
Pagination:
0021

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-0081(6960-01)-1, SD-TR-80-82
Contract/Grant Number(s):
F04701-80-C-0081
Monitor Series:
TR-80-82
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_1.2.7_Experimentation; JCA_5.3_Planning
Modernization Areas:
Space; Microelectronics
Communities of Interest:
Space
Descriptor(s):
*SIZES(DIMENSIONS), *SOLAR FLARES, *SOLAR X RAYS, MEASUREMENT, SPACE SYSTEMS, PLASMAS(PHYSICS), ELECTRON DENSITY, INTENSITY, RATES, CRYSTALS, LOW ENERGY, CLASSIFICATION, DATA ACQUISITION, X RAY SPECTROSCOPY, SUN
Field(s)/Group(s):
Astrophysics
Keyword(s):
Spectroheliograms, X ray kernels, Raster maps, Solar maps, Solex crystals, Monochromators, Solex collimators, Soft x rays, Wavelength range
Report Date:
1980 Nov 28