Wide field imaging spectroscopy using aberration-corrected holography

摘要

The most powerful diagnostics of hot gas in the universe are well understood, but there are few instruments capable of making measurements at the wavelengths of the most important lines (103 nm, 123 nm, and 155 nm, the lithium-like series of O, N, and C). No complete survey has been done with moderate spatial resolution in emission even though virtually all measurements capable of detecting the presence of lithium-like oxygen do so. We present a type of imaging spectrograph that takes advantage of the large, well-corrected field of view from a three-mirror anastigmat (TMA) in conjunction with aberration-corrected holography applied to the tertiary. The combination of a TMA and aberration-corrected holography allows a large well-corrected field of view in diffracted light, potentially providing an excellent basis for an instrument capable of the first large scale survey from 100 nm to 150 nm.