RESIK observations of highly ionized argon and potassium X-ray emission lines in solar flares

Details RESIK observations of highly ionized argon and potassium X-ray emission lines in solar flares RESIK observations of highly ionized argon and potassium X-ray emission lines in solar flares

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..765s&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

3

Solar Physics, Flares, X-Ray Spectroscopy

Scientific paper

The first detailed solar X-ray spectra obtained by the RESIK bent crystal spectrometer aboard the CORONAS-F obervatory are presented and instrument performance discussed. RESIK is a bent crystal spectrometer covering four soft X-ray spectral ranges (3.369-3.879 Å, 3.821-4.326 Å, 4.307-4.890 Å 4.960-6.086 Å), some of which have not been well covered by previous instruments. RESIK forms spectra in each of these ranges in 250 bins simultaneously in intervals of 10 s or so. Many flares, including several of GOES X-class, and bright active regions have now been observed in detail. (See http://www.cbk.pan.wroc.pl/2002.htm for examples.) In this paper, observations of spectral lines due to K XVIII, Ar XVIII, Ar XVII, S XV, Si XIV and Si XIII ions will be shown and the time evolution of their intensities will be discussed. These observations will eventually allow for precise determination of differential emission measure (DEM) and chemical composition of the hot flare plasma, and should, alongside data from the RHESSI, TRACE, and SOHO spacecraft, enable new and detailed insight into solar flare mechanisms.

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