The Extreme Ultraviolet–Past and Future

  title={The Extreme Ultraviolet–Past and Future},
  author={Richard Tousey},
  journal={Applied Optics},
  • R. Tousey
  • Published 1 November 1962
  • Physics
  • Applied Optics
The extreme ultraviolet is traced from Schumann’s beginning to the present day. Developments and progress since 1941 are discussed in detail. Progress in the spectroscopy of the sun and the stars from rockets and satellites, in high-temperature plasma spectroscopy and in techniques is also discussed, and attention is called to the close interrelations between these fields. 
An extreme ultraviolet radiation source for the simulation of the ionosphere
An extreme ultraviolet (EUV) radiation source for space simulation of plasma and other related phenomena in the laboratory has been developed. A total of forty‐eight small EUV lamps are put together
Wavelength measurements in the vacuum ultra-violet
Techniques of spectroscopic observations in the range from 2000 A to 10 A are reviewed with emphasis on precise wavelength measurements. The topics discussed include the design of spectrographs for
The synchrotron radiation of the 6-GeV DESY machine as a fundamental radiometric standard.
The characteristics of synchrotron radiation emitted by the 6-GeV DESY machine were studied in the spectral range 2200-5500 A and good agreement was found between the experimental results and the values predicted by the theory of the synch Rotron radiation derived by J. Schwinger.
The spectroscopy of highly ionised atoms
Spectroscopic investigations of the structure of highly ionised atoms have undergone significant developments in recent years. The experimental progress is largely due to the introduction of several
Review of short wavelength laser research
A review of the status of research towards achieving lasing action in the vacuum ultraviolet and soft X-ray spectral regions is presented and various possible methods of verifying the presence of gain with their relative merits are discussed.
Precision Laser spectroscopy in the Extreme Ultraviolet
Techniques for the production of short wavelengths in the extreme ultraviolet wavelength range are described, spanning low-order harmonic generation in the perturbative regime for narrow bandwidth
Use of a sliding spark in the vacuum ultraviolet range of the spectrum
A newly designed sliding spark source is described. The source has a broad spectral range whose lower end overlaps the X-ray range below 200 Å. It permits both photographic and photoelectric


Solar Spectroscopy in the Far Ultraviolet
The program of extreme ultraviolet solar spectroscopy, conducted from rockets by the Naval Research Laboratory, is described from its inception, in 1946, to the present. Included is a brief
Continuous Emission Spectra of Rare Gases in the Vacuum Ultraviolet Region. II. Neon and Helium
The experimental conditions for, and the characteristics and origin of the recently found Ne continuum are described. The 600 A band and the continuum of helium were reinvestigated in relation to the
An Extension of the Spectrum in the Extreme Ultra-Violet
THE researches of Schumann led him to extend the spectrum to the neighbourhood of wave-length 1250. His limiting wave-length was determined by the absorption of the fluorite which formed a necessary
The Jefferies and Thomas theory of line formation by non-coherent scattering in a non-equilibrium chromosphere is applied to the solar Lyman- alpha profiles recently photographed by a rocket
X‐ray and Lyman‐alpha emission from the Sun as measured from the NRL SR‐1 satellite
Measurements made from the SR-1 satellite confirm the hypothesis that solar X rays are the cause of flare SID events, and that variations in solar Lyman α are not geophysically significant. Results
Spectral and Angular Distribution of Ultraviolet Radiation from the 300-Mev Cornell Synchrotron
The spectral characteristics of the radiation emitted by high-energy centripetally accelerated electrons have been examined for various electron energies over a wide wavelength range extending down
Two Light Sources for Use in the Extreme Ultraviolet
Two light sources, one a capillary discharge tube and the other a hollow cathode discharge tube, for use in the extreme ultraviolet are described. Both tubes are rugged, easily demountable, and
Attempt to measure night helium glow—Evidence for metastable molecules in the night ionosphere
An Aerobee rocket flown from White Sands Missile Range at 1115 UT, November 29, 1960, included a first experimental attempt to measure the intensity of the helium glow in the night sky. The
Photoelectric Cells for the Vacuum Ultraviolet
The photoelectric effect on Ni, Pt, and W has been used in the design of windowless phototubes for the direct detection of radiation in the vacuum ultraviolet, especially of wavelengths below the