Plasma diagnostics for SUMER on board the SOHO mission

Abstract

We highlight a rich source of high-resolution EUV observations that the Solar Ultraviolet Measurements of Emitted Radiation (SUMER) instrument, on board the SOHO mission, is capable of making in the broad spectral range from less than 500 angstrom to 1610 angstrom , and which is further extended to shorter wavelengths by the Coronal Diagnostic Spectrometer (CDS)instrument. This will provide a unique opportunity to study in greater detail than previously done, the diagnostics and dynamics of the solar plasma from the upper chromosphere to the corona. We also briefly present the spectroscopic diagnostics for several ions relevant to the SUMER/CDS spectral range for the inference of the physical parameters and discuss underlying coronal physics