Gasdynamic Lasers: An Introduction - 1st Edition - ISBN: 9780120569502, 9780323160445

Gasdynamic Lasers: An Introduction

1st Edition

Authors: John D. Jr. Anderson
eBook ISBN: 9780323160445
Imprint: Academic Press
Published Date: 28th January 1976
Page Count: 192
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Gasdynamic Lasers: An Introduction is a 12-chapter introductory text to major development generations of gasdynamic lasers, focusing on their underlying physical and fundamental aspects. The opening chapters discuss the basic detailed physical phenomena that ultimately are responsible for producing gasdynamic laser action and the methods of calculating the performance of these devices. These topics are followed by a chapter on confirmation of the performance calculations through arc and shock tunnel experiments. The discussion then shifts to vibrational relaxation process behind normal shock waves in CO2-N2-He mixtures and assesses their population inversions occurring in the nonequilibrium flow. Other chapters explore the concepts of downstream mixing and optical cavity in gasdynamic lasers, as well as the laser beam extracted from these devices. A systematic study of aerodynamic windows that use supersonic flow across the aperture is presented in the concluding chapters, along with the phenomena associated with gasdynamic laser diffusers. This introductory text will be of great value to professional scientists and engineers, as well as to students and workers in the field who are interested in interdisciplinary applied science.

Table of Contents

Preface Acknowledgments Chapter I Introduction Chapter II Elementary Physics 2.1 Energy Levels and Population Inversion 2.2 Why Does a Population Inversion Make a Laser Work? 2.3 Definition and Calculation of Small-Signal Gain Chapter III Thermodynamics and Vibrational Kinetics of the CO2-N2-H2O OR He Gasdynamic Laser 3.1 Molecular Properties of CO2 and N2 3.2 Vibrational Energy and Population Distribution 3.3 Vibrational Kinetics 3.4 Vibrational Rate Equations Chapter IV Calculation Of Gasdynamic Laser Performance 4.1 Analysis of the Flow Field 4.2 Vibrational Model 4.3 Results 4.4 Comparison with Basov 4.5 Coupled and Uncoupled Flows 4.6 Recapitulation 4.7 Power Extraction Chapter V Comparison Between Theory and Experiment 5.1 Kinetic Rate Data 5.2 Nonequilibrium Gasdynamics 5.3 Small-Signal Gain 5.4 NOL 3-MW Arc Tunnel 5.5 NOL 12.7-cm Shock Tunnel 5.6 Arc Tunnel Experiments 5.7 Shock Tunnel Experiments 5.8 Other Experiments Chapter VI Inversions Behind Normal Shock Waves Chapter VII CO2-N2 Gasdynamic Lasers: State-Of-The-Art 7.1 Introduction 7.2 Increased H2O Content 7.3 Increased Temperature 7.4 Binary Scaling 7.5 Fuels for Gasdynamic Lasers Chapter VIII The Carbon Monoxide Gasdynamic Laser 8.1 Introduction 8.2 The Physical Process 8.3 Results 8.4 Disadvantage Chapter IX Downstream Mixing Gasdynamic Lasers 9.1 Introduction 9.2 Problems 9.3 Results Chapter X Optical Cavity Considerations for Gasdynamic Lasers 10.1 Introduction 10.2 Cavity Types 10.3 Causes of Beam Distortion in Gasdynamic Lasers Chapter XI Aerodynamic Windows 11.1 Introduction 11.2 Concepts 11.3 Results 11.4 Summary Chapter XII Diffusers 12.1 Introduction 12.2 Purpose of the Diffuser 12.3 Diffuser Flow Field 12.4 Normal Shock Recovery 12.5 Area Ratio 12.6 Drop-Out Pressure 12.7 Summary Appendix A Effect of Uncertainties in the Kinetic Rate


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© Academic Press 1976
Academic Press
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About the Author

John D. Jr. Anderson

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