Investigation of Laser-Induced Plasma Processes.

Ip, Precila C; Armstrong, R. A.; Baird, James C.

doi:10.21236/ada190463

Cited by 1 publication

(3 citation statements)

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“…The present calculation gives good qualitative agreement with experiment and blast wave theory 42 . It has, however, some limitations in the code neglects several issues which may be important and thus must be addressed.…”

Section: Discussionsupporting

confidence: 82%

“…As discussed in ref. 42, the results using this profile were inconsistent with experimental observations, thus a more detailed approach is necessary. That the kinetic results obtained from this temperature profile do not agree with experimental data is, in retrospect, not surprising.…”

Section: Initial Conditions and Temperature Profilecontrasting

confidence: 57%

“…Although the visual description of the spark is time-integrated, it should still be reproduced by the hydrodynamic results. Previous hydrodynamic calculations of the LINUS plasma using the SALE code with no regrid capability showed that the shock wave had already reached the boundary of the computing mesh at 5 nS 42 . In order to acquire hydrodynamic information at later times, Dr. Ken Cosner of MRC/SB has provided a regrid routine, which when coupled to the SALE code, allows the calculation to be extended to times of greater than 3 nS.…”

Section: A Generalmentioning

confidence: 99%

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IR Plasma Emissions

Precila¹,

Armstrong²

1990

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Ea. NAME OF PERFORMING ORGANI4ZA7!ON 6b. OFFICE SYMBOL 19 .*S.RC (Continue on reverse if necessary and identify by block number) This final report summarizes the latest results in data acquisition and various F Jleling efforts of the GL-I.INUS plasma. Plasma radiance equations relevant to the .1NUS plasma are first reviewed. Experimental data on the early-time plasma continuum .!e next presented. This is followed by discussions of the calculations on Stark broadening, hydrodynamics, and kinetics. Finally, recommendations on future experiments Iand calculations are made based on the present results. :0. DISTRIBUTION/ AVAILABILITY OF ABSTRACT 21 ABSTRACT SECURITY CLASSIFICATION CIUNCLASSIFIED,UN4LIMITED 0 SAME AS RPT 0 OTIC USERS Unclassified ..'a. NAME OF RESPONSIBLE INDIVIDUAL 22b. TELEPH4ONE (Include Area Code) 22c. OF;iCE SYMBOL L. S. Dze1 1t 617-37737-L0P DO FORM 1 47 3. 84 MAR 83 APR edition rmay be used until exnausted. SECURITY CLASSIFICA7ION OF THIS1 PAGE All other editions are obsolete. IIKICI ArUFF4r) [ABLE OF CONTENTS CHAPTER TITLE PAGE I. INTRODUCTION I II. LINUS PLASMA ISSUES AND ANALYTIC RELATIONSHIPS 3 A. General B. Free-Free Transitions in the Field of an Ion C. Free-Free Transitions in the Field of a Neutral D. Free-Bound Emission E. Kramers-Uns6ld Approximation F. Bound-Bound Emission G. Issues III. SPECTROSCOPIC CONTINUUM AND LINE EMISSION EXPERIMENTS 17 A. General B. Experiment C. Results D. Discussion IV. STARK BROADENING 29 A. General B. Theory C. Results and LINUS Comparisons D. Discussion V. HYDRODYNAMIC CALCULATIONS 64 A. General B. SALE Code and Hydrodynamic Model C. Results D. Discussion VI. LINUS REACTION KINETICS MODEL 90 A. General B. Recombination/Re-ionization C. Initial Conditions and Temperature Profile D.