Author: Ronald Louis Fante
Publisher:
ISBN:
Category : Diffusion
Languages : en
Pages : 18
Book Description
A variational method has been developed to account for the effect of diffusion on laser induced breakdown. The method is applicable for arbitrary distributions of intensity in the focal volume. It has been specifically applied to the calculation of breakdown for Gaussian spots, and found to yield breakdown intensities differing by nearly a factor of 2 from calculations employing simplified diffusion models. (Author).
Effect of Diffusion on Laser Induced Breakdown of Gases
Author: Ronald Louis Fante
Publisher:
ISBN:
Category : Diffusion
Languages : en
Pages : 18
Book Description
A variational method has been developed to account for the effect of diffusion on laser induced breakdown. The method is applicable for arbitrary distributions of intensity in the focal volume. It has been specifically applied to the calculation of breakdown for Gaussian spots, and found to yield breakdown intensities differing by nearly a factor of 2 from calculations employing simplified diffusion models. (Author).
Publisher:
ISBN:
Category : Diffusion
Languages : en
Pages : 18
Book Description
A variational method has been developed to account for the effect of diffusion on laser induced breakdown. The method is applicable for arbitrary distributions of intensity in the focal volume. It has been specifically applied to the calculation of breakdown for Gaussian spots, and found to yield breakdown intensities differing by nearly a factor of 2 from calculations employing simplified diffusion models. (Author).
Effect of Diffusion on Laser Induced Breakdown of Gases
Author: Ronald L. Fante
Publisher:
ISBN:
Category : Diffusion
Languages : en
Pages : 0
Book Description
A variational method has been developed to account for the effect of diffusion on laser induced breakdown. The method is applicable for arbitrary distributions of intensity in the focal volume. It has been specifically applied to the calculation of breakdown for Gaussian spots, and found to yield breakdown intensities differing by nearly a factor of 2 from calculations employing simplified diffusion models. (Author)
Publisher:
ISBN:
Category : Diffusion
Languages : en
Pages : 0
Book Description
A variational method has been developed to account for the effect of diffusion on laser induced breakdown. The method is applicable for arbitrary distributions of intensity in the focal volume. It has been specifically applied to the calculation of breakdown for Gaussian spots, and found to yield breakdown intensities differing by nearly a factor of 2 from calculations employing simplified diffusion models. (Author)
Breakdown Mechanisms for Laser-induced Discharges in Super-high Pressure Gases
Author: Arwin A. Dougal
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
The paper presents the results of validation experiments on the effects of laser induced breakdown of super-high pressure gases (7 to 2000 atmospheres). It was determined that the optical extension of the classical diffusion - controlled microwave breakdown theory correctly predicts a minimum in the electric field vs. pressure curve. The experiments identify electron impact as the responsible breakdown mechanism. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
The paper presents the results of validation experiments on the effects of laser induced breakdown of super-high pressure gases (7 to 2000 atmospheres). It was determined that the optical extension of the classical diffusion - controlled microwave breakdown theory correctly predicts a minimum in the electric field vs. pressure curve. The experiments identify electron impact as the responsible breakdown mechanism. (Author).
Laser-induced Discharge Phenomena
Author: I︠U︡riĭ Petrovich Raĭzer
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 392
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 392
Book Description
The Effect of High Magnetic Fields on the Threshold of Laser-Induced Gas Breakdown
Author: Edward James Button
Publisher:
ISBN:
Category : Deuterium
Languages : en
Pages : 69
Book Description
A quantum-rate analysis of laser-induced breakdown in deuterium and helium gas was used to predict the dependence of the breakdown threshold intensity on gas pressure, laser pulse length, and the magnitude of an applied external magnetic field parallel to the direction of propagation of the laser beam. Diffusion, elastic and inelastic collisions, and multiphoton ionization of atomic and molecular states excited by electron impact were considered.
Publisher:
ISBN:
Category : Deuterium
Languages : en
Pages : 69
Book Description
A quantum-rate analysis of laser-induced breakdown in deuterium and helium gas was used to predict the dependence of the breakdown threshold intensity on gas pressure, laser pulse length, and the magnitude of an applied external magnetic field parallel to the direction of propagation of the laser beam. Diffusion, elastic and inelastic collisions, and multiphoton ionization of atomic and molecular states excited by electron impact were considered.
Scientific and Technical Aerospace Reports
Laser-induced Breakdown in Gases
Author: James Henry Vellenga
Publisher:
ISBN:
Category :
Languages : en
Pages : 194
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 194
Book Description
Laser Induced Breakdown in Gases
Author: Susan Christine Orgee
Publisher:
ISBN:
Category : Electric discharges through gases
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Electric discharges through gases
Languages : en
Pages :
Book Description
The Effect of Optical Aberrations on Laser-induced Gas Breakdown
Author: Daniel J. Ryan
Publisher:
ISBN:
Category : Aberration
Languages : en
Pages : 366
Book Description
Publisher:
ISBN:
Category : Aberration
Languages : en
Pages : 366
Book Description
Laser-Induced Breakdown Spectroscopy
Author: Jagdish P. Singh
Publisher: Elsevier
ISBN: 0128188308
Category : Science
Languages : en
Pages : 624
Book Description
Laser-Induced Breakdown Spectroscopy, Second Edition, covers the basic principles and latest developments in instrumentation and applications of Laser Induced Breakdown Spectroscopy (LIBS). Written by active experts in the field, it serves as a useful resource for analytical chemists and spectroscopists, as well as graduate students and researchers engaged in the fields of combustion, environmental science, and planetary and space exploration. This fully revised second edition includes several new chapters on new LIBS techniques as well as several new applications, including flame and off-gas measurement, pharmaceutical samples, defense applications, carbon sequestration and site monitoring, handheld instruments, and more. LIBS has rapidly developed into a major analytical technology with the capability of detecting all chemical elements in a sample, of real- time response, and of close-contact or stand-off analysis of targets. It does not require any sample preparation, unlike conventional spectroscopic analytical techniques. Samples in the form of solids, liquids, gels, gases, plasmas, and biological materials (like teeth, leaves, or blood) can be studied with almost equal ease. This comprehensive reference introduces the topic to readers in a simple, direct, and accessible manner for easy comprehension and maximum utility. Covers even more applications of LIBS beyond the first edition, including combustion, soil physics, environment, and life sciences Includes new chapters on LIBS techniques that have emerged in the last several years, including Femtosecond LIBS and Molecular LIBS Provides inspiration for future developments in this rapidly growing field in the concluding chapter
Publisher: Elsevier
ISBN: 0128188308
Category : Science
Languages : en
Pages : 624
Book Description
Laser-Induced Breakdown Spectroscopy, Second Edition, covers the basic principles and latest developments in instrumentation and applications of Laser Induced Breakdown Spectroscopy (LIBS). Written by active experts in the field, it serves as a useful resource for analytical chemists and spectroscopists, as well as graduate students and researchers engaged in the fields of combustion, environmental science, and planetary and space exploration. This fully revised second edition includes several new chapters on new LIBS techniques as well as several new applications, including flame and off-gas measurement, pharmaceutical samples, defense applications, carbon sequestration and site monitoring, handheld instruments, and more. LIBS has rapidly developed into a major analytical technology with the capability of detecting all chemical elements in a sample, of real- time response, and of close-contact or stand-off analysis of targets. It does not require any sample preparation, unlike conventional spectroscopic analytical techniques. Samples in the form of solids, liquids, gels, gases, plasmas, and biological materials (like teeth, leaves, or blood) can be studied with almost equal ease. This comprehensive reference introduces the topic to readers in a simple, direct, and accessible manner for easy comprehension and maximum utility. Covers even more applications of LIBS beyond the first edition, including combustion, soil physics, environment, and life sciences Includes new chapters on LIBS techniques that have emerged in the last several years, including Femtosecond LIBS and Molecular LIBS Provides inspiration for future developments in this rapidly growing field in the concluding chapter