S320p.53 — Analysis of selected solar flares soft X-ray spectra from Diogeness observations

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Aug 10th at 6:00 PM until 7:30 PM

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Author(s): Marek Steslicki2, Janusz Sylwester2, Barbara Sylwester2, Zaneta Anna Szaforz2, Zbigniew Kordylewski2, Stefan Plocieniak2, Marek Siarkowski2, Kenneth J.H. Phillips1

Institution(s): 1. Natural History Museum, 2. Space Research Centre Polish Academy of Sciences

Diogeness was the uncollimated scanning flat crystal spectrometer observing flare X-ray spectra in four narrow wavelength bands in vicinity of Ca XIX, S xv and Si XIII He-like line 'triplets' around 3.18 Å, 5.04 Å and 6.65 Å. In the two spectral channels, the same emission lines around Ca XIX 3.178 Å resonance are scanned in opposite directions, being diffracted from precisely adjusted identical Quartz crystals mounted on the common shaft in so-called Dopplerometer (tachometer) configuration. The observations of the solar X-ray spectrum made by Diogeness provides a direct diagnostic information on plasma characteristics during the impulsive flare energy release. We present results of analysis for selected events which occurred during the Diogeness operation time from August 16, 2001 to September 17, 2001.