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ISBN 13 :
Total Pages : 302 pages
Book Rating : 4.:/5 (94 download)
Download or read book Time-resolved Spectroscopic Studies of Laser-produced Plasmas written by and published by . This book was released on 1982 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space and Time Resolved Spectroscopy of Laser-produced Plasmas written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The determination of level populations and detailed population mechanisms in dense plasmas has become an increasingly important problem in atomic physics. In this work, the density variation of line intensities and level populations in aluminum K-shell and molybdenum and silver L-shell emission spectra have been measured from high-powered, laser-produced plasmas. For each case, the density dependence of the observed line emission is due to the effect of high frequency electron-ion collisions on metastable levels. The density dependent line intensities vary greatly in laser-produced plasmas and can be used to extract detailed information concerning the population kinetics and level populations of the ions. The laser-plasmas had to be fully characterized in order to clearly compare the observed density dependence with atomic theory predictions. This has been achieved through the combined use of new diagnostic instruments and microdot targets which provided simultaneously space, time, and spectrally resolved data. The plasma temperatures were determined from the slope of the hydrogen-like recombination continuum. The time resolved electron density profiles were measured using multiple frame holographic interferometry. Thus, the density dependence of K-shell spectral lines could be clearly examined, independent of assumptions concerning the dynamics of the plasma. In aluminum, the electron density dependence of various helium-like line intensity ratios were measured. Standard collisional radiative equilibrium models fail to account for the observed density dependence measured for the ''He/sub .cap alpha.//IC'' ratio. Instead, a quasi-steady state atomic model based on a purely recombining plasma is shown to accurately predict the measured density dependence. This same recombining plasma calculation successfully models the density dependence of the high-n ''He/sub .gamma.//He/sub .beta./'' and ''He/sub delta//He/sub .beta./'' helium-like resonance line intensity ratios.
Author : Bruce Kai Fong Young
Publisher :
ISBN 13 :
Total Pages : 724 pages
Book Rating : 4.:/5 (33 download)
Download or read book Space and Time Resolved Spectroscopy of Laser-produced Plasmas written by Bruce Kai Fong Young and published by . This book was released on 1988 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robin Stewart Marjoribanks
Publisher :
ISBN 13 :
Total Pages : 400 pages
Book Rating : 4.:/5 (23 download)
Download or read book Time-resolved Spectroscopy of Nonequilibrium Ionization in Laser-produced Plasmas written by Robin Stewart Marjoribanks and published by . This book was released on 1988 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Getasew Admasu Wubetu
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Polarisation Resolved Spectroscopy of Laser Produced Plasmas written by Getasew Admasu Wubetu and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The degree of polarisation of the light emitted from laser produced plasmas has been studied using time-resolved imaging along with time- and polarisation-resolved spectroscopy in the visible spectral range. A Q-switched Nd: YAG laser (wavelength = 1064 nm, pulse width = 14 ns) was used to ablate the target. Optical spectra were obtained using a Czerny-Turner spectrometer equipped with an intensified charge-coupled device (ICCD) readout. A Wollaston prism split the emitted radiation into orthogonally polarised states for simultaneous spectral acquisition. Polarisation anisotropy in line emission is the result of a non-statistical distribution of population amongst the available magnetic sublevels in the upper state of the transition of interest. The origin of the non-statistical distribution lies in an anisotropy in the electron velocity distribution function (EVDF) which is the most often described by a bi-Maxwellian function. For the continuum emission, it is found that the main contributor is recombination radiation and once again an EVDF anisotropy is the origin. In this case the partially preferred direction of motion of the recombining electrons is transferred into a partially preferred polarisation direction. The imaging results reveal stronger plasma emission polarisation in air than in vacuo. They also showed stronger polarisation of the continuum emission compared to line emission at higher pressure for Al (at 396.15 nm) and Al+ (466.3 nm) features. In vacuo, the degree of polarisation (P) of all charge states studied oscillates with time. It is suggested that this oscillation is a result of self-generated magnetic fields which cause the plasma itself to undergo compression and rarefraction cycles. In this case the EVDF will also oscillate and hence the degree of polarisation will do so. The magnetic field itself is thought to arise from a Rayleigh-Taylor (RT) instability. The effects of target geometry and incident laser polarisation on the emission were also studied. A greater effect was observed for continuum radiation compared to line emission. It is also observed that the laser polarisation has the greatest effect for oblique incidence on the target.
Author : Joseph Fred O'Shay
Publisher :
ISBN 13 :
Total Pages : 282 pages
Book Rating : 4.:/5 (487 download)
Download or read book Time-resolved Visible and Extreme Ultraviolet Spectroscopy of Laser-produced Tin Plasma written by Joseph Fred O'Shay and published by . This book was released on 2007 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the final section of this study, we investigate the radiative properties of tin ablation plasma as the laser irradiance is varied by more than an order of magnitude. The effect of increased focused laser energy is manifested in a weak scaling of radiation temperature, and a significant broadening of the emission lifetime at the highest laser intensities. It is found that the resulting radiation conversion efficiency is not a strong function of laser intensity within the parameter regime of this work. It is shown that agreement between experimental and simulated plasma conditions becomes progressively worse in the high-irradiance regime as the ionization and radiative transfer models play increasingly dominant roles in the plasma energetics.
Author : Joseph R. Lakowicz
Publisher :
ISBN 13 :
Total Pages : 488 pages
Book Rating : 4.3/5 (91 download)
Download or read book Time-resolved Laser Spectroscopy in Biochemistry written by Joseph R. Lakowicz and published by . This book was released on 1988 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David A. Cremers
Publisher : John Wiley & Sons
ISBN 13 : 0470093005
Total Pages : 302 pages
Book Rating : 4.4/5 (7 download)
Download or read book Handbook of Laser-Induced Breakdown Spectroscopy written by David A. Cremers and published by John Wiley & Sons. This book was released on 2006-07-11 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Starting from fundamentals and moving through a thorough discussion of equipment, methods, and techniques, this text provides a unique reference source for this important new analysis method. The authors use a combination of tutorial discussions ranging from basic principles up to more advanced descriptions along with extensive figures and photographs to clearly explain topics addressed in the text. It is intended that the data tables will be located within the Education section of SpectroscopyNOW.com Provides a thorough but understandable discussion of the basic principles, instrumentation, methodology, and sampling procedures of the method based on atomic emission spectroscopy. Presents a discussion of the many advantages of the method along with limitations, to provide the reader a balanced overview of capabilities of the method Presents an overview of some real-world applications of the method Provides an up-to-date list of references to LIBS literature and a unique list of element detection limits using a uniform analysis method
Author : Luca U. Labate
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Progress in Laser-plasma X-ray Sources written by Luca U. Labate and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 934 pages
Book Rating : 4.0/5 ( download)
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Murdoch
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (93 download)
Download or read book Time-resolved, optic studies of laser-produced plasmas written by John Murdoch and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Massimo Inguscio
Publisher : World Scientific
ISBN 13 : 9814548553
Total Pages : 474 pages
Book Rating : 4.8/5 (145 download)
Download or read book Laser Spectroscopy - Proceedings Of The Xii International Conference written by Massimo Inguscio and published by World Scientific. This book was released on 1996-03-20 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book includes all the recent major advances in the field of Laser Spectroscopy. Major results span from the control of matter by electromagnetic fields (trapping and coding) to high precision measurements on simple atomic systems and to quantum optics with single atoms. As an outstanding contribution, the reader will find in the book the first report of the Bose-Einstein condensation achieved by laser-cooling of rubidium atoms. Achievements in the technology of tunable sources, in particular of miniaturized solid state devices, are also reported. Most recent advances in molecular spectroscopy are illustrated with emphasis on 'cooled' spectra, clusters and high accuracy frequency references. Topics such as atomic interferometry and microcavity quantum optics are also covered.
Author : George Bekefi
Publisher :
ISBN 13 : 9780471063452
Total Pages : 695 pages
Book Rating : 4.0/5 (634 download)
Download or read book Principles of Laser Plasmas written by George Bekefi and published by . This book was released on 1976 with total page 695 pages. Available in PDF, EPUB and Kindle. Book excerpt: Good,No Highlights,No Markup,all pages are intact, Slight Shelfwear,may have the corners slightly dented, may have slight color changes/slightly damaged spine.
Author : Richard W. Solarz
Publisher : Routledge
ISBN 13 : 1351435620
Total Pages : 712 pages
Book Rating : 4.3/5 (514 download)
Download or read book Laser Spectroscopy and its Applications written by Richard W. Solarz and published by Routledge. This book was released on 2017-11-22 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bringing together scattered literature from a range of sources, Laser Spectroscopy and ItsApplications clearly elucidates the tools and concepts of this dynamic area, and providesextensive bibliographies for further study.Distinguished experts in their respective fields discuss resonance photoionization, laser absorption,laser-induced breakdown, photodissociation, Raman scattering, remote sensing,and laser-induced fluorescence. The book also incorporates an overview of the semiclassicaltheory of atomic and molecular spectra.Combining background at an intermediate level with an in-depth discussion of specifictechniques, Laser Spectroscopy and Its Applications is essential reading for laser and opticalscientists and engineers; analytical chemists; health physicists; researchers in optical,chemical, pharmaceutical, and metallurgical industries. It will also prove useful for upperlevelundergraduate and graduate students of laser spectroscopy and its applications, andin-house seminars and short courses offered by firms and professional societies.
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ISBN 13 :
Total Pages : 444 pages
Book Rating : 4.0/5 ( download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 310 pages
Book Rating : 4.3/5 (91 download)
Download or read book Fusion Energy Update written by and published by . This book was released on 1978 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 702 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
