The High Resolution Coronal Imager (Hi-C)

Physics

Scientific paper

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7509 Corona, 7549 Ultraviolet Emissions, 7594 Instruments And Techniques

Scientific paper

The major scientific impact of Hi-C will be to place significant new constraints on theories of coronal heating and structuring, by establishing whether or not there is additional fine structure to be seen. It will also settle a long- standing argument over the relationship between coronal temperature and the level of structuring, including the question of whether or not there is a diffuse corona. In the process we will establish whether or not further increases in spatial resolution will be useful for understanding coronal structure and dynamics. This mission will thus act as a pathfinder for a number of proposed high-cost programs, and will be crucial in establishing the future directions for mission planning. For instance, observations of the location of high-T sources in the corona and the determination of subsequent energy flow by Hi-C will provide basic input for the design of future high resolution spectrometers. These data will also be useful in wavelength selection for such missions as Solar Probe, Solar-C and RAM. Hi-C will be a two-channel 0.2 arcsec imager capable of taking 1 6x6 arcminute image every 10 seconds.

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