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Absorption of laser radiation in a H-He plasma. I - Theoretical calculation of the absorption coefficientThe theory for calculating the absorption of laser radiation by hydrogen is outlined for the temperatures and pressures of common laboratory plasmas. Nonhydrogenic corrections for determining the absorption by helium are also included. The coefficients for the absorption of He-Ne laser radiation at the wavelengths of 0.633, 1.15, and 3.39 microns in a H plasma is presented for temperatures in the range from 10,000 to 40,000 K and electron number densities in the range from 10 to the 15th power to 10 to the 18th power per cu cm. The total absorption of a H-He plasma calculated from this theory is compared with the measured absorption. The theoretical composition of the H-He absorption is analyzed with respect to the significant absorption processes, inverse bremsstrahlung, photoionization, resonance excitation, and photodetachment.
Document ID
19740058538
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Stallcop, J. R.
(NASA Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
April 1, 1974
Publication Information
Publication: Physics of Fluids
Volume: 17
Subject Category
Physics, Plasma
Accession Number
74A41288
Distribution Limits
Public
Copyright
Other

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