The Interaction of Picosecond and Subpicosecond Laser Pulses with Gases and Plasmas PDF Download
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Author: Andrew James MacKinnon
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Languages : en
Pages : 0
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Author: Andrew James MacKinnon
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Category :
Languages : en
Pages : 0
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Author: Yanmin Li
Publisher:
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Category :
Languages : en
Pages : 414
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Author:
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Category :
Languages : en
Pages :
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Author: Christine Ann Coverdale
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ISBN:
Category :
Languages : en
Pages : 398
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Author:
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Category :
Languages : en
Pages :
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Laser-plasma interactions have been of interest for many years not only from a basic physics standpoint, but also for their relevance to numerous applications. Advances in laser technology in recent years have resulted in compact laser systems capable of generating (psec), 10[sup 16] W/cm[sup 2] laser pulses. These lasers have provided a new regime in which to study laser-plasma interactions, a regime characterized by L[sub plasma][ge] 2L[sub Rayleigh]> c[tau]. The goal of this dissertation is to experimentally characterize the interaction of a short pulse, high intensity laser with an underdense plasma (n[sub o][le] 0.05n[sub cr]). Specifically, the parametric instability known as stimulated Raman scatter (SRS) is investigated to determine its behavior when driven by a short, intense laser pulse. Both the forward Raman scatter instability and backscattered Raman instability are studied. The coupled partial differential equations which describe the growth of SRS are reviewed and solved for typical experimental laser and plasma parameters. This solution shows the growth of the waves (electron plasma and scattered light) generated via stimulated Raman scatter. The dispersion relation is also derived and solved for experimentally accessible parameters. The solution of the dispersion relation is used to predict where (in k-space) and at what frequency (in[omega]-space) the instability will grow. Both the nonrelativistic and relativistic regimes of the instability are considered.
Author: Romain Philippe Gaillard
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Category :
Languages : en
Pages :
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Author: S.L. Shapiro
Publisher: Springer Science & Business Media
ISBN: 3662225743
Category : Science
Languages : en
Pages : 397
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Soon after the invention of the laser, a brand-new area of endeavour emerged after the discovery that powerful ultrashort (picosecond) light pulses could be extracted from some lasers. Chemists, physicists, and engineers quickly recognized that such pulses would allow direct temporal studies of extremely rapid phenomena requiring, however, development of revolutionary ultrafast optical and electronic devices. For basic research the development of picosecond pulses was highly important because experimentalists were now able to measure directly the motions of atoms and molecules in liquids and solids: by disrupting a material from equilibrium with an intense picosecond pulse and then recording the time of return to the equilibrium state by picosecond techniques. Studies of picosecond laser pulses-their generation and diagnostic tech niques-are still undergoing a fairly rapid expansion, but a critical review of the state of the art by experienced workers in the field may be a timely help to new experimentalists. We shall review the sophisticated tools developed in the last ten years, including the modelocked picosecond-pulse-emitting lasers, the picosecond detection techniques, and picosecond devices. Moreover, we shall outline the basic foundations for the study of rapid events in chemistry and physics, which have emerged after many interesting experiments and which are now being applied in biology. An in-depth coverage of various aspects of the picosecond field should be helpful to scientists and engineers alike.
Author: Mohammed Almassarani
Publisher:
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Category :
Languages : de
Pages : 0
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In this dissertation, we explore two major themes related to intense laser-matter interaction. Firstly, we present a comprehensive characterization of the intense THz light and charged particle emission from the rear surface of thin targets during the interaction with ultrashort laser pulses. Secondly, we report the first direct visualization of the Coulomb field of relativistic electron bunches from laser-thin solid interactions on a sub-picosecond timescale. We introduce a novel non-destructive single-shot detection scheme based on the electrooptic principle. Our time-resolved measurements reveal a complex temporal structure with multiple electron bunches propagating at nearly the speed of light. Moreover, our observations confirm the contraction of the electric field of the relativistic electron bunches under the Lorentz transformation. Further, we demonstrate the spatiotemporal evolution of the Coulomb field wavefronts as the electron bunches propagate away from the target. This work paves the way for non-invasive measurements of fast dynamics of charged particles on sub-picosecond timescales.
Author: Margaret Murnane
Publisher:
ISBN:
Category : Picosecond pulses
Languages : en
Pages : 324
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Author: Ulrich Hilmar Wagner
Publisher: Cuvillier Verlag
ISBN: 3736928246
Category : Science
Languages : en
Pages : 150
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