Ultraviolet and extreme ultraviolet spectroscopy of the solar corona at the Naval Research Laboratory.

Applied optics

PubMedID: 26560611

Moses JD, Ko YK, Laming JM, Provornikova EA, Strachan L, Beltran ST. Ultraviolet and extreme ultraviolet spectroscopy of the solar corona at the Naval Research Laboratory. Appl Opt. 2015;54(31):F222-31.
We review the history of ultraviolet and extreme ultraviolet spectroscopy with a specific focus on such activities at the Naval Research Laboratory and on studies of the extended solar corona and solar-wind source regions. We describe the problem of forecasting solar energetic particle events and discuss an observational technique designed to solve this problem by detecting supra-thermal seed particles as extended wings on spectral lines. Such seed particles are believed to be a necessary prerequisite for particle acceleration by heliospheric shock waves driven by a coronal mass ejection.