NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Laboratory study of the spectrum of highly ionized calcium in the 100-250 A range applied to solar flare diagnosticsCalcium was introduced into the TEXT tokamak, and its spectral emission was recorded in the 50-360 A range by an absolutely calibrated grazing incidence spectrometer. These observations of highly ionized species of calcium at known conditions of plasma electron temperature and density allow testing of line brightness ratio predictions based on theoretical values of temperature-dependent electron excitation rates. The confirmation of the expected ratios in Be I-like to O I-like calcium allows more confident use of these ratios as a density diagnostic of remote astrophysical sources such as solar flares.
Document ID
19870053405
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lippmann, S.
(Johns Hopkins Univ. Baltimore, MD, United States)
Finkenthal, M.
(Johns Hopkins Univ. Baltimore, MD, United States)
Huang, L. K.
(Johns Hopkins Univ. Baltimore, MD, United States)
Moos, H. W.
(Johns Hopkins Univ. Baltimore, MD, United States)
Stratton, B. C.
(Johns Hopkins Univ. Baltimore, MD, United States)
Yu, T. L.
(Johns Hopkins University Baltimore, MD, United States)
Bhatia, A. K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 13, 2013
Publication Date
May 15, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 316
ISSN: 0004-637X
Subject Category
Plasma Physics
Accession Number
87A40679
Funding Number(s)
CONTRACT_GRANT: DE-AC05-78ET-53043
CONTRACT_GRANT: DE-AC02-76ET-53006
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available