Gas absorption cell photometer for rocket observations of local interstellar helium

Details Gas absorption cell photometer for rocket observations of local interstellar helium Gas absorption cell photometer for rocket observations of local interstellar helium

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976rsci...47..277f&link_type=abstract

Review of Scientific Instruments, vol. 47, Mar. 1976, p. 277-281.

Astronomy and Astrophysics

Astronomy

5

Absorption Spectroscopy, Gas Spectroscopy, Helium, Interstellar Gas, Photometers, Rocket-Borne Instruments, Astronomical Photometry, Atmospheric Scattering, Calibrating, Photosensitivity, Spectrophotometry

Scientific paper

A photometer sensitive in the 584-A line of He I, incorporating a helium-gas absorption cell, has been developed. The helium is confined at a pressure of 0.2 torr between thin-metal-foil broad-band ultraviolet filters. The cell contains sufficient helium to absorb 584-A radiation scattered from atmospheric helium. The ratio of fluxes seen with the cell full and empty provides a valuable datum for fitting models of the local interstellar medium, which is independent of solar 584-A flux, interstellar helium density, and photometer sensitivity.-

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