Recent Progress in the Classification of the Spectra of Highly Ionized Atoms

摘要: Publisher Summary This chapter discusses recent developments in the classification of spectra highly ionized atoms. The launching a rocket January 1960 under auspices Air Force Cambridge Research Laboratory (AFCRL), U.S., marked beginning contemporary research There are two main experiments that operated on NASA Apollo Telescope Mount SKYLAB and were designed to study solar spectra. first is Harvard Ultraviolet Spectrometer–Spectroheliometer. It obtains photoelectric observations spectral region 280–1350 A with resolution 1.6 spatial 5 arcsec, which corresponds approximately 3500 km 2 surface. Six other channels resolutions between 4 8.3 can be set monitor lines. second manned experiment Naval Laboratory's (NRL) XUV spectroheliograph covering wavelength 150 630 A. slitless 200 cm concave grating spectrograph produces stigmatic spectrally dispersed images film sun up 0.13 10 depending wavelength.