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An Optics Free Spectrometer for the Extreme UltravioletThe optics-free spectrometer is a photon spectrometer. It provides the photon spectrum of a broadband source by converting photons of energy E into electrons of energy E', according to the Einstein relation, E' = E - Ei. E, is the ionization threshold of the gas target of interest (any of the rare gases are suitable) and E is the incoming photon energy. As is evident from the above equation, only a single order spectrum is produced throughout the energy range between the first and second ionization potentials of the rare gas used. Photons with energy above the second ionization potential produce two groups of electrons, but they are readily distinguished from each other. This feature makes this device extremely useful for determining the true spectrum of a continuum source or a many line source. The principle of operation and the laboratory results obtained with a representative configuration of the optics-free spectrometer are presented.
Document ID
20000021018
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Judge, D. L.
(University of Southern California Los Angeles, CA United States)
Daybell, M. D.
(University of Southern California Los Angeles, CA United States)
Hoffman, J. R.
(University of Southern California Los Angeles, CA United States)
Gruntman, M. A.
(University of Southern California Los Angeles, CA United States)
Ogawa, H. S.
(University of Southern California Los Angeles, CA United States)
Samson, J. A. R.
(Nebraska Univ. Lincoln, NE United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1994
Publication Information
Publication: Nuclear Instruments and Methods in Physics Research
Publisher: Elsevier Science B.V.
Issue: Secti A
ISSN: 0168-9002
Subject Category
Optics
Funding Number(s)
CONTRACT_GRANT: NAGw-2354
CONTRACT_GRANT: NAGw-2677
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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