Full-solar-surface multi-stage solar extreme-ultraviolet spectrum imaging method

Abstract

The invention discloses a full-solar-surface multi-stage solar extreme-ultraviolet spectrum imaging method. Light at a light inlet is focused to a system focal plane by an off-axis parabolic reflecting mirror, wherein an extreme-ultraviolet variable-pitch grating is arranged at the focal plane of the system; focused solar extreme-ultraviolet radiation is dispersed by the extreme-ultraviolet variable-pitch grating and the dispersed light is received by five levels of detectors; images received by four detectors have chromatic dispersion phenomena and the image received by the intermediate detector has no chromatic dispersion, so that spatial information is obtained directly at the level without chromatic dispersion and the spectral information is obtained based on inversion results of the five levels of imaging. According to the invention, simultaneous observation of full-solar-surface space and spectral information is realized; the method is suitable for observing large-range dynamic solar activities like the CME; the solar burst speed information can be obtained; and a novel way is provided for researches of space weather and space environment.

Description

technical field [0001] The present invention belongs to the field of spectral imaging technology. Specifically, the present invention designs a solar extreme ultraviolet spectral imaging method, especially a full-sun surface multi-level solar extreme ultraviolet multi-level spectral imaging based on a variable-pitch grating that can obtain burst speeds. method. Background technique [0002] The Sun is the only star that can be observed with high temporal and spatial spectral resolution. At the same time, solar activity is the source of space weather changes, which may cause drastic changes in the sun-earth environment and have serious impacts on spaceflight, communication, and navigation. Carrying out solar activity observation is not only the need of scientific research, but also the need of national strategic development. Solar activities that have a huge impact on the Sun-Earth environment include flares and coronal mass ejections (CME for short). Solar activities such...

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Problems solved by technology

[0007] Aiming at the limitation that the solar eruption speed cannot be obtained at present, the present invention proposes a full-helioscopic multi-level solar extreme ultraviolet spectral imaging method. In addition to realizing all the functions of traditional extreme ultraviolet imaging to observe solar activities such as flares and coronal holes and their evolution, it can also Obtain the Doppler frequency shift corresponding to the observed spectrum segment, so as to invert the solar eruption velocity

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