Resik: A Bent Crystal X-ray Spectrometer for Studies of Solar Coronal Plasma Composition

We describe the RESIK (REntgenovsky Spektrometr s Izognutymi Kristalami) instrument, consisting of two double-channel X-ray spectrometers, designed to observe solar active region and flare plasmas. RESIK is one of the instruments making up the scientific payload of the Russian CORONAS-F solar missio...

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Bibliographic Details
Published in:	Solar physics Vol. 226; no. 1; pp. 45 - 72
Main Authors:	Sylwester, J., Gaicki, I., Kordylewski, Z., Kowaliński, M., Nowak, S., Płocieniak, S., Siarkowski, M., Sylwester, B., Trzebiński, W., Bakała, J., Culhane, J. L., Whyndham, M., Bentley, R. D., Guttridge, P. R., Phillips, K. J. H., Lang, J., Brown, C. M., Doschek, G. A., Kuznetsov, V. D., Oraevsky, V. N., Stepanov, A. I., Lisin, D. V.
Format:	Journal Article
Language:	English
Published:	Dordrecht Springer Nature B.V 01-01-2005
Subjects:	Corona Crystals Emission measurements Plasma Solar physics Spectrometers Studies Temperature distribution X-rays
Online Access:	Get full text
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Summary:	We describe the RESIK (REntgenovsky Spektrometr s Izognutymi Kristalami) instrument, consisting of two double-channel X-ray spectrometers, designed to observe solar active region and flare plasmas. RESIK is one of the instruments making up the scientific payload of the Russian CORONAS-F solar mission. The uncollimated spectrometer uses two silicon and two quartz bent crystals observing flare, active region and coronal spectra in four wavelength bands with a resolving power (l/ l) of 61000. The wavelength coverage, 3.3-6.1 Aa, includes emission lines of Si, S, Cl, Ar, and K and in the third diffraction order, the wavelength range includes He-like Fe lines (1.85 Aa) and Ni lines (1.55 Aa) with dielectronic satellites, emitted during intense, hot flares. The instrument is believed to be the best calibrated space-borne crystal spectrometer flown to date. The spectrometer dynamically adjusts the data gathering intervals from 1 s to 5 minutes, depending on the level of solar X-ray emission at the time of observation. The principal aims of RESIK are the measurements of relative and absolute element abundances in the emitting plasma and the temperature distribution of plasma (differential emission measure) over the temperature interval 3 and 50 MK. This paper summarizes the scientific objectives of RESIK and describes the design, characteristics, and performance of the instrument.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1
ISSN:	0038-0938 1573-093X
DOI:	10.1007/s11207-005-6392-5