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Ionization Chamber Measures Extreme UltravioletIonization chamber operates in nearly total photon absorption as stable, self-calibrating detector of ionizing extreme ultraviolet radiation. Working gas of instrument is neon; photoionization properties well known and readily applicable to absolute measurements. Designed for measurements of solar ultraviolet flux aboard sounding rocket, instrument used on Earth to measure ultraviolet radiation in vacuum systems. Ionization chamber collects positive neon ions and electrons produced by irradiation of neon gas by ultraviolet photons. Approximately one ion produced by each photon; consequently, photoionization current nearly proportional to photon flux.
Document ID
19870000219
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Carlson, Robert W.
(Caltech)
Date Acquired
August 13, 2013
Publication Date
May 1, 1987
Publication Information
Publication: NASA Tech Briefs
Volume: 11
Issue: 5
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
NPO-16369
Accession Number
87B10219
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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