A Study of X-Ray Emission from Laser Heated Plasma PDF Download

Author: O. P. Manley
Publisher:
ISBN:
Category :
Languages : en
Pages : 44

View

Book Description
This document is a final report on the investigation of laser-plasma interactions leading to pulsed X-ray emission. In the course of this research two topics were looked into in some detail. First, the authors evaluated and found promising a method for efficient laser heating of a turbulent plasma column generated in a double inverse pinch experiment. The results obtained in this ongoing experimental effort, supported primarily by AFOSR, show that the heating method suggested herein leads to a feasible source of intense X-ray pulses. Secondly, the authors looked into effects to be expected when extremely intense laser beams interact with dense plasmas. It was found that under these conditions relativistic effects will lead to intense collimated pulses by synchrotron-like emissions of radiation in the 10 kev region.

Author: Hideo Hirose
Publisher:
ISBN:
Category :
Languages : en
Pages : 5

View

Book Description
A pulse train laser with low peak power can heat a dense plasma effectively and promote ionization of atoms up to higher stages such as lithium-like aluminum. This fact was proved by soft x-ray spectra. X-ray emission from laser produced plasma has been extensively studied for many years and now has found new promising application in variety of field, including, for example, various forms of x-ray spectroscopy, x-ray laser, as well as microscopy and lithography.

Author:
Publisher:
ISBN:
Category : Controlled fusion
Languages : en
Pages : 532

View

Book Description

Author: I. C. E. Turcu
Publisher: John Wiley & Sons
ISBN:
Category : Science
Languages : en
Pages : 348

View

Book Description
Soft X-rays have great potential for use in a wide variety of applications, including the semiconductor industry and the life sciences. X-Rays from Laser Plasmas: Generation and Applications focuses exclusively and in detail on the science and technology of soft X-rays produced with non-synchrotron sources. Using a minimum of mathematical formulae, it discusses how such X-rays can be efficiently and economically generated from plasmas produced by lasers, and how they interact with matter. Authored by Dr Edmond Turcu, one of the pioneers in this field, X-Rays from Laser Plasmas: Generation and Applications will be of great interest to a wide variety of readers, including all those working in X-ray lithography, microscopy, and radiobiology.

Author: B. Lax
Publisher:
ISBN:
Category :
Languages : en
Pages : 52

View

Book Description
An experimental and theoretical study of CO2 Laser-induced gas breakdown, laser heating of magnetically confined plasma, and emission of soft X-rays from laser-heated plasma has been performed. Demonstrations were made of the roles of electron diffusion, pulse time, and inelastic losses in laser-induced gas breakdown. The phenomenon of CO2 laser beam self-trapping and associated plasma dynamics were studied. High-Z plasma impurities and magnetic field were shown to increase the heating and soft X-ray emission from CO2 laser-heated plasmas.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 46

View

Book Description
The intensity and spectral characteristics of x-ray emitted from laser-produced plasmas have been investigated computatinoally and experimentally. a two-dimensional implosi code was used successfully to calculate laser-plasma radiation characteristics and to aid in the design of laser targets for high-yield x-ray production. Other computer codes, in use or under development predict lime strengths and energies for laser-plasma x-ray emission. An experimental effort is aimed at reliable measurements of x-ray yields and spectra. a wide variety of x-ray detection methods have been evaluated, and x-ray yields have been measured from plasmas produced with two dissimilar laser systems. The high energy x-ray spectrum, from about 10 to 140 keV, has been studied using high-gain scintillatino detectors and thick K-edge filters. Various supplementary measurements have provided information concerning characteristics of the target-reflected laser light, the ion energies, and the laser intensity patterns.

Author: Stephen Tamor
Publisher:
ISBN:
Category :
Languages : en
Pages : 49

View

Book Description
A discussion of the kinetics of heating radiation of a laser-heated plasma is presented. Estimates are derived for all relevant reaction rates and time scales. It is possible, on the basis of very general considerations, to predict the main features of the x-ray spectrum, the validity of the optically thin approximation, and to obtain a minimum value of the total deposited energy below which no appreciable x-ray conversion is possible. The propagation of the laser light as it approaches the critical density plane is discussed. Since a large fraction of the energy absorption actually occurs at this surface, and it is here that the usual WKB solution fails, some special cases for which exact solution is possible are examined. The final results suggest a simple estimate for the field strength near the critical density plane which is not very sensitive to the finer details of the plasma density profile. (Author).

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

View

Book Description
Spectroscopic investigations of the x-ray emission of plasmas heated by 120 ps, frequency doubled pulses from the JANUS Nd: glass laser are presented. High Z K-shell spectra emitted from slab targets heated to near 10[sup 17] W cm[sup[minus]2] intensity are investigated. High resolution ([gamma]/[Delta][gamma]>5000) x-ray spectra of multicharged ions of H-like Ti, Co, Ni, Cu, and also H-like Sc in the spectral range 1.5--3.0[angstrom] are obtained in single laser shots using a spherically bent Mica crystal spectrograph with a 186 mm radius of curvature. The spectra- have one dimensional spatial resolution of about 25[mu]m and indicate that the size of the emission zone of the resonance, transitions is25[mu]m. Simultaneous x-ray images of the plasma from a charge-coupled device pinhole camera confirmed that the plasma x-ray emission is from a similar sized source. Survey spectra[gamma]/[Delta][gamma]=500--1000) taken with a flat LiF (200) crystal spectrometer with a charge-coupled device detector complement the high resolution data. Two dimensional LASNEX modeling of the laser target conditions indicate that the high K-shell charge states are produced in the hot dense region of the plasma with electron temperature2 keV and density[approximately]10[sup 22] cm[sup[minus]3]. These experiments demonstrate that with modest laser energy, plasmas heated by high-intensity 120 ps lasers provide a very bright source of hard[approximately]8 keV x-ray emission.

Author: National Research Council
Publisher: National Academies Press
ISBN: 030908637X
Category : Science
Languages : en
Pages : 177

View

Book Description
Recent scientific and technical advances have made it possible to create matter in the laboratory under conditions relevant to astrophysical systems such as supernovae and black holes. These advances will also benefit inertial confinement fusion research and the nation's nuclear weapon's program. The report describes the major research facilities on which such high energy density conditions can be achieved and lists a number of key scientific questions about high energy density physics that can be addressed by this research. Several recommendations are presented that would facilitate the development of a comprehensive strategy for realizing these research opportunities.

Author: Michaela Kozlová
Publisher: Springer Nature
ISBN: 3030354539
Category : Science
Languages : en
Pages : 199

View

Book Description
These proceedings gather a selection of invited and contributed papers presented during the 16th International Conference on X-Ray Lasers (ICXRL 2018), held in Prague, Czech Republic, from 7 to 12 October 2018. The conference is part of an ongoing series dedicated to recent developments in the science and technology of X-ray lasers and other coherent X-ray sources, with an additional focus on supporting technologies, instrumentation and applications. The book highlights advances in a wide range of fields including laser and discharge-pumped plasma X-ray lasers, the injection and seeding of X-ray amplifiers, high-order harmonic generation and ultrafast phenomena, X-ray free electron lasers, novel schemes for (in)coherent XUV, X-ray and γ-ray generation, XUV and X-ray imaging, optics and metrology, X-rays and γ-rays for fundamental science, the practical implementation of X-ray lasers, XFELs and super-intense lasers, and the applications and industrial uses of X-ray lasers.