Accession Number : AD0617250

Title :   VACUUM ULTRAVIOLET LIGHT SOURCES: NEW EXCITATION UNIT FOR THE RARE GAS CONTINUA.

Descriptive Note : Instrumentation papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Huffman,R. E. ; Larrabee,J. C. ; Chambers,Derek

Report Date : JUN 1965

Pagination or Media Count : 24

Abstract : Experimental details are presented of an excitation unit developed for use in producing the rare gas continua in helium, argon, krypton, and xenon. The unit is essentially a thyratron-controlled modulator which replaces the spark-gap external trigger in a conventional spectroscopic 'condensed discharge'. With this unit, it is possible to obtain the Hopfield helium continuum in the 580 to 1100A wave-length region with improved intensity and stability so that an improved bandwidth of slightly less than 0.25A is obtained with a 2.2 m normal-incidence vacuum monochromator and photoelectric scanning detection. This excitation unit is described, and its application to study of the rare gas continua and to absorption cross-section measurements in hydrogen is illustrated. (Author)

Descriptors :   (*ULTRAVIOLET RADIATION, SOURCES), (*RARE GASES, EXCITATION), (*CONTINUOUS SPECTRA, RARE GASES), GAS DISCHARGES, DISCHARGE TUBES, THYRATRONS, MODULATORS, MONOCHROMATIC LIGHT, BANDWIDTH, ULTRAVIOLET SPECTROSCOPY, HELIUM, ARGON, KRYPTON, XENON, HYDROGEN

Distribution Statement : APPROVED FOR PUBLIC RELEASE