Speaker
Description
Analysis of the dynamics of the hot coronal plasma is the most promising method
to examine the contribution of wave-like phenomena in the global heating of the solar corona.
We present here a new, state-of-the art instrument for imaging spectroscopy:
the Solar Line Emission Dopplerometer (SLED). It is based on the Multi-channel
Subtractive Double Pass (MSDP) principle, which combines the advantages of
filters and slit spectrographs. The SLED (presently under construction) will observe
coronal structures in the forbidden lines of FeX 637.4 nm and FeXIV 530.3 nm. It will
measure Doppler shifts up to 150 km/s with high precision (50 m/s) and fast cadence (1 Hz),
over a 1000" x 150" rectangular FOV (for six meter telescope’s focal length).
The SLED is optimized to detect high-frequency wave-like plasma motions
which could be the signatures of the coronal heating processes and allows
studies of the dynamics of fast evolving events. A numerical simulation of
observations is shown to demonstrate the capabilities of the instrument.
The regular observations will be performed with the high-altitude coronagraph
at Lomnicky Stit Observatory (LSO), and during total solar eclipses.
