This volume contains eight invited papers and seventy-three contributed papers presented at the Fourth International Symposium on Gas Flow and Chemical Lasers. which was held in Stresa. Italy. from September 13 to 17. 1984. The purpose of the Symposium was to record and discuss current research developments and applications related to high power lasers. Papers were solicited from the entire spectrum of activities, includ ing basic physics, aerothermodynamics, new laser media, laser design, diagnostic techniques, laser propagation. interaction phenom ena, applications. The Symposium was an…mehr
This volume contains eight invited papers and seventy-three contributed papers presented at the Fourth International Symposium on Gas Flow and Chemical Lasers. which was held in Stresa. Italy. from September 13 to 17. 1984. The purpose of the Symposium was to record and discuss current research developments and applications related to high power lasers. Papers were solicited from the entire spectrum of activities, includ ing basic physics, aerothermodynamics, new laser media, laser design, diagnostic techniques, laser propagation. interaction phenom ena, applications. The Symposium was an opportunity for scientists and engineers representing all these disciplines to come together to report their recent work, to exchange ideas and to provide an up-to-date account of international progress in these fields. The contributed papers were reviewed by the members of the Scientific Advisory CoEmittee. who also took responsibility for formulating the program of invited lectures. As editor I wish to express my appreciation and my gratitude to people and organizations that made this Symposium a success: the Members of the Scientific Advisory Committee, the Members of the Local Organizing Committee, the Sponsors and the Symposium Secretary. A grateful acknowledgement is expressed to Dr. M. Sandra Oggiano for assistance in the organization of the Symposium and publication of these proceedings.
Invited Lectures.- Chemically Pumped Electronic Transition Lasers.- Optical Resonance Transfer Lasers for Mode Control.- Optical Phase Conjugation in Laser Resonators.- Laser Material Processing.- The Oxygen-Iodine Chemical Laser.- Air Force Laser Research.- Flow Laser Diagnostic Techniques.- Pulsed-Laser/Material Interaction.- Chemical Lasers.- Numerical Solutions of Complete and Reduced Navier-Stokes Equations for Supersonic Chemical Laser Flow Modeling.- A Pulsed, Multi-Kilohertz-Repetition-Rate, Supersonic HF Chemical Laser.- Saturation Processes in Doppler-Broadened HF Vibrational Transition.- Enhanced Mixing in CO-Flowing Laminar Streams.- Experimental Study of the Spectral Output of a DF-Laser.- Operation of Small Scale,Efficient Chemical Oxygen-Iodine Laser and Study of the Reaction of O2(1?) with Pb Atoms.- A New Numerical Method for Turbulent Mixing of Supersonic Reacting Flows in Chemical Laser Cavities.- Theoretical and Experimental Study of cw HF Chemical Laser Performance.- Propagation Velocity of the Ionization Front Driven by a High-Current Relativistic E-Beam Through the Active Laser Media of Increased Pressure.- Time Resolved Spectra and Small Signal Gain in HF: An Experimental and Theoretical Investigation.- Quasi One-Dimensional Model of a Ring Diffusion cw Chemical Laser and some of its Applications.- Flowfield Diagnostic of Supersonic cw HF Chemical Laser by Using Improved LIF and Chemiluminescence Methods.- Gasdynamic Lasers.- Rapid Expansion Nozzles for Gasdynamic Lasers.- Turbulence Measurement in the Flow of a CO2 LEDA type Laser.- Subsonic TE N2-CO Mixing Laser.- Numerical Estimations of 16 ?m CO2 Gasdynamic Lasers with Various Contours of 2-Dimensional Nozzles.- On Simple Estimation of Characteristics for CO2/N2 Mixing Gasdynamic Laser.- Aerodynamic Disturbances from Supersonic Nozzle Arrays.- Modeling of 16 ?m CO2 Gasdynamic Laser in Intracavity Cascading Mode.- Development of a Closed-Cycle CW TE CO Laser Operating in the Temperature Region 100-300 K.- Microwave Excited Gasdynamic CO2-Laser.- Screen Nozzle Mixing Laser Calculations.- Theoretical Design of Mixing Gasdynamic Lasers.- Two Simplified Models and their Application to Performance Study of Mixing Gasdynamic Lasers.- High Averaged Power Systems.- Photoionization of CO2 and CO Laser Media Containing Low-Ionization-Potential NO-NO2 Admixtures.- High Power Blackbody Pumped CO2 Lasers.- A Novel Command Charging System for High Repetition-Rate Pulsed Discharge Lasers.- Flow Effects on the Laser Power of Transverse Flow TE Lasers.- Flow Characteristics of Closed Loop High PRF E-Beams or X-Ray Assisted Discharge Exciplex Laser.- A New 10 kW Industrial Carbon Dioxide Laser.- Further Development of the Non-Stationary Stochastic Model of Diffuse Electric Discharges in Turbulent Gas Flows.- The Effect of Chemical Processes on the Stratification of Volume-Dominated Gas Discharges.- A Study of Propagation of a Conducting Channel in the Plasma of a Non-self-Sustained Discharge.- Suppressing Attachment-Induced Instabilities by Operating Gas Discharges in an HF Mode.- Limiting Energy Inputs in the Non-Self-Sustained Discharge of a CO2-Flow Laser.- Subsonic Flow CO2 Laser With Transverse RF Excitation.- High-Repetition-Rate Long-Pulse-Discharge XeCl Laser Preionized by a Low-Density Electron or X-Rays Beam.- A Compact 75 Watts CO2 Laser at 750 Hertz.- New Laser Media.- Scaling Relations for the Plasma Recombination Laser.- Kinetic Study of the VUV Emissions of Ar-Kr Mixtures.- CW Ion-Argon-Lasers with the Supersonic Transverse Gas Flow.- Rovibrational State Population Distributions Calculated from Spontaneous Fluorescence Measurements for CO (v ? 4, J ? 10) in Highly Heated Supersonic Free Jets of CO in N2 and Ar.- A XeF-Excimer Laser Excited in a Longitudinal Discharge.- Population Inversion Occuring in the Soft X-Rays Range in Lithium-Like Aluminium Ions.- 3-Photon Excitation of Xenon and Frequency Tripling by Non-Linear Effect.- A Compact Resistively Stabilized Excimer Laser for Injection- and Mode-Locking Applications.- High Energy Optics. Adaptive Optics.- Atmospheric Turbulence Simulation Cell for Optical Propagation Experiment.- Analysis of Waveguide Systems for Transmitting and Shaping Infrared Radiation.- Resonators for High Power Lasers.- Aberrations in Laser Beam Expanders Due to Tilt of Input Beam.- Mirrors and Windows for High-Energy Lasers: the Wavefront Distortion Problem.- An Analysis of Optical Resonators with Tapered-Reflectivity Mirrors.- Experimental and Theoretical Investigations of CO2-GDL with a High Hydrogen Content.- Effects of Injection Hole in Concave Mirror of Unstable Resonator With Saturable Gain.- Analytical Model of Optical Cavity for a Gasdynamic Laser.- Material Processing and Applications.- Production of Gram Quantities of Highly Enriched Carbon-12 by Selective Infrared Dissociation.- Application of Mathematical Heat Transfer Analysis to High Power CO2 Laser Material Processing.- A Powerful cw CO2-Oscillator-Amplifier System for Research and Material Processing.- Inert-Gas-Assisted Cutting of Low-Carbon Steel Sheets Using a High Power-Laser System.- Laser Parameters for Surface Treatments of Metals.- Laser Cutting of Bulk Steel (40 mm) Due to Guided Flow of Radiation and Reactive Gas in the Workpiece.- Oxygen Assisted Laser Cutting of Low Carbon Steel Sheets.- Laser Propagation and Laser Matter Interaction.- Broadening of CO2-Laser Beam During its Propagation in Aerosol With Absorbing Solid Particles.- The Role of CO2-Laser Beam Divergence in Cloud Clearing.- On the Interaction of High-Power Laser Beam With Metal Targets.- Experimental Investigation of the Thermomechanical Effects Induced by a CO2 Laser on Various Materials in Rarefied Atmosphere.- Laser-Metal Interaction: The Gasdynamic of Emitted Vapours.- Advanced Lightweight Nuclear Power Sources for Laser Beam Power Applications.- Hydrodynamic Perturbations in Radiation-Induced Vaporization of Metals.- Laser-Induced Flows in Aerosol.- Coherent Pump Dynamics and Pulse Evolution in Three-Level Superfluorescence and Control of Light by Light.- Evaluation of Laser Beam Profile Uniformity by Means of a Computerized Thermographic Method.- Hydrodynamical Models of Aerosol Induced Breakdown.
Invited Lectures.- Chemically Pumped Electronic Transition Lasers.- Optical Resonance Transfer Lasers for Mode Control.- Optical Phase Conjugation in Laser Resonators.- Laser Material Processing.- The Oxygen-Iodine Chemical Laser.- Air Force Laser Research.- Flow Laser Diagnostic Techniques.- Pulsed-Laser/Material Interaction.- Chemical Lasers.- Numerical Solutions of Complete and Reduced Navier-Stokes Equations for Supersonic Chemical Laser Flow Modeling.- A Pulsed, Multi-Kilohertz-Repetition-Rate, Supersonic HF Chemical Laser.- Saturation Processes in Doppler-Broadened HF Vibrational Transition.- Enhanced Mixing in CO-Flowing Laminar Streams.- Experimental Study of the Spectral Output of a DF-Laser.- Operation of Small Scale,Efficient Chemical Oxygen-Iodine Laser and Study of the Reaction of O2(1?) with Pb Atoms.- A New Numerical Method for Turbulent Mixing of Supersonic Reacting Flows in Chemical Laser Cavities.- Theoretical and Experimental Study of cw HF Chemical Laser Performance.- Propagation Velocity of the Ionization Front Driven by a High-Current Relativistic E-Beam Through the Active Laser Media of Increased Pressure.- Time Resolved Spectra and Small Signal Gain in HF: An Experimental and Theoretical Investigation.- Quasi One-Dimensional Model of a Ring Diffusion cw Chemical Laser and some of its Applications.- Flowfield Diagnostic of Supersonic cw HF Chemical Laser by Using Improved LIF and Chemiluminescence Methods.- Gasdynamic Lasers.- Rapid Expansion Nozzles for Gasdynamic Lasers.- Turbulence Measurement in the Flow of a CO2 LEDA type Laser.- Subsonic TE N2-CO Mixing Laser.- Numerical Estimations of 16 ?m CO2 Gasdynamic Lasers with Various Contours of 2-Dimensional Nozzles.- On Simple Estimation of Characteristics for CO2/N2 Mixing Gasdynamic Laser.- Aerodynamic Disturbances from Supersonic Nozzle Arrays.- Modeling of 16 ?m CO2 Gasdynamic Laser in Intracavity Cascading Mode.- Development of a Closed-Cycle CW TE CO Laser Operating in the Temperature Region 100-300 K.- Microwave Excited Gasdynamic CO2-Laser.- Screen Nozzle Mixing Laser Calculations.- Theoretical Design of Mixing Gasdynamic Lasers.- Two Simplified Models and their Application to Performance Study of Mixing Gasdynamic Lasers.- High Averaged Power Systems.- Photoionization of CO2 and CO Laser Media Containing Low-Ionization-Potential NO-NO2 Admixtures.- High Power Blackbody Pumped CO2 Lasers.- A Novel Command Charging System for High Repetition-Rate Pulsed Discharge Lasers.- Flow Effects on the Laser Power of Transverse Flow TE Lasers.- Flow Characteristics of Closed Loop High PRF E-Beams or X-Ray Assisted Discharge Exciplex Laser.- A New 10 kW Industrial Carbon Dioxide Laser.- Further Development of the Non-Stationary Stochastic Model of Diffuse Electric Discharges in Turbulent Gas Flows.- The Effect of Chemical Processes on the Stratification of Volume-Dominated Gas Discharges.- A Study of Propagation of a Conducting Channel in the Plasma of a Non-self-Sustained Discharge.- Suppressing Attachment-Induced Instabilities by Operating Gas Discharges in an HF Mode.- Limiting Energy Inputs in the Non-Self-Sustained Discharge of a CO2-Flow Laser.- Subsonic Flow CO2 Laser With Transverse RF Excitation.- High-Repetition-Rate Long-Pulse-Discharge XeCl Laser Preionized by a Low-Density Electron or X-Rays Beam.- A Compact 75 Watts CO2 Laser at 750 Hertz.- New Laser Media.- Scaling Relations for the Plasma Recombination Laser.- Kinetic Study of the VUV Emissions of Ar-Kr Mixtures.- CW Ion-Argon-Lasers with the Supersonic Transverse Gas Flow.- Rovibrational State Population Distributions Calculated from Spontaneous Fluorescence Measurements for CO (v ? 4, J ? 10) in Highly Heated Supersonic Free Jets of CO in N2 and Ar.- A XeF-Excimer Laser Excited in a Longitudinal Discharge.- Population Inversion Occuring in the Soft X-Rays Range in Lithium-Like Aluminium Ions.- 3-Photon Excitation of Xenon and Frequency Tripling by Non-Linear Effect.- A Compact Resistively Stabilized Excimer Laser for Injection- and Mode-Locking Applications.- High Energy Optics. Adaptive Optics.- Atmospheric Turbulence Simulation Cell for Optical Propagation Experiment.- Analysis of Waveguide Systems for Transmitting and Shaping Infrared Radiation.- Resonators for High Power Lasers.- Aberrations in Laser Beam Expanders Due to Tilt of Input Beam.- Mirrors and Windows for High-Energy Lasers: the Wavefront Distortion Problem.- An Analysis of Optical Resonators with Tapered-Reflectivity Mirrors.- Experimental and Theoretical Investigations of CO2-GDL with a High Hydrogen Content.- Effects of Injection Hole in Concave Mirror of Unstable Resonator With Saturable Gain.- Analytical Model of Optical Cavity for a Gasdynamic Laser.- Material Processing and Applications.- Production of Gram Quantities of Highly Enriched Carbon-12 by Selective Infrared Dissociation.- Application of Mathematical Heat Transfer Analysis to High Power CO2 Laser Material Processing.- A Powerful cw CO2-Oscillator-Amplifier System for Research and Material Processing.- Inert-Gas-Assisted Cutting of Low-Carbon Steel Sheets Using a High Power-Laser System.- Laser Parameters for Surface Treatments of Metals.- Laser Cutting of Bulk Steel (40 mm) Due to Guided Flow of Radiation and Reactive Gas in the Workpiece.- Oxygen Assisted Laser Cutting of Low Carbon Steel Sheets.- Laser Propagation and Laser Matter Interaction.- Broadening of CO2-Laser Beam During its Propagation in Aerosol With Absorbing Solid Particles.- The Role of CO2-Laser Beam Divergence in Cloud Clearing.- On the Interaction of High-Power Laser Beam With Metal Targets.- Experimental Investigation of the Thermomechanical Effects Induced by a CO2 Laser on Various Materials in Rarefied Atmosphere.- Laser-Metal Interaction: The Gasdynamic of Emitted Vapours.- Advanced Lightweight Nuclear Power Sources for Laser Beam Power Applications.- Hydrodynamic Perturbations in Radiation-Induced Vaporization of Metals.- Laser-Induced Flows in Aerosol.- Coherent Pump Dynamics and Pulse Evolution in Three-Level Superfluorescence and Control of Light by Light.- Evaluation of Laser Beam Profile Uniformity by Means of a Computerized Thermographic Method.- Hydrodynamical Models of Aerosol Induced Breakdown.
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