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2 edition of Hard x-ray spectrum from a one-fluid laser plasma model found in the catalog.

Hard x-ray spectrum from a one-fluid laser plasma model

D. G Colombant

Hard x-ray spectrum from a one-fluid laser plasma model

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Published by Naval Research Laboratory in Washington, D.C .
Written in English

    Subjects:
  • Laser plasmas

  • Edition Notes

    StatementD.G. Colombant and W.M. Manheimer
    SeriesNRL memorandum report -- 4241
    ContributionsManheimer, Wallace M., 1942-, Naval Research Laboratory (U.S.). Plasma Theory Branch
    The Physical Object
    Paginationiii, 12 p. :
    Number of Pages12
    ID Numbers
    Open LibraryOL17961581M


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Hard x-ray spectrum from a one-fluid laser plasma model by D. G Colombant Download PDF EPUB FB2

Get this from a library. Hard x-ray spectrum from a one-fluid laser plasma model. [D G Colombant; Wallace M Manheimer; Naval Research Laboratory (U.S.). Plasma Theory Branch.]. Comparisons between hard‐x‐ray experimental spectra and those obtained from a planar one‐dimensional one‐temperature fluid laser‐produced plasma model show good agreement over several orders of magnitude in x‐ray intensity and for Nd‐laser irradiances varying between 2×10 14 and 8×10 15 W/cm key to this agreement is the careful modeling of electron‐energy flux Cited by: 2.

The x-ray spectra of plasma radiation in the wavelength range 30– Å are studied. The radiation is emitted from plasma of a vacuum discharge with storage energy less than 30 J that is initiated on an Al or Fe cathode by beam from neodymium laser with a power density up to 10 12 W cm − by: 2.

Experimental setup for time-resolved x-ray absorption spectroscopy. The figure is constructed from three-dimensional machine drawings with a sectioning cut defined by a horizontal plane at the height of the laser and x-ray beams. This cut reveals the interior of the water jet by: The spectrum of the X-ray radiation generated by laser-produced plasma contains information about the rapidly evolving high-density high-temperature plasmas.

Spectroscopic methods are most widely used for diagnostics in laser plasma on account of the high X-ray flux. The book concludes with a description and comparison with alternate sources and applications for an x-ray laser.

This work is both an introduction to x-ray lasers and a how-to guide for specialists. It provides new entrants and others interested in the field with a comprehensive overview and describes useful analyses and experiments as guidance.

Hard X-rays emitted from this plasma exhibit a energy spectrum containing both continuum radiation and element specific X-ray emission lines. The X-ray pulse duration - inherit from the driving laser pulse duration - ranges in the hundreds of femtoseconds.

Soft X-ray spectra (30–70 Å) of aluminum plasma have been measured in experiments carried out at the Kanal-2 laser facility at laser intensities of (1–7) × W/cm2. It is shown that the measured spectra satisfactory agree with those calculated using the RADIAN numerical by: 5.

Carbon plasma X-ray spectrum 71 X-Ray Crystal Spectrograph 72 Bragg condition 72 Properties of X-ray dispersive crystals 73 Crystal X-ray minispectrometer 73 Iron plasma X-ray spectra 73 Lens-less Imaging: X-Ray Pinhole Camera 76 Imaging geometry 76 X-ray images of copper plasma 77Cited by: In a seminal paper describing the excitation of x-rays by electrons accelerated in air in the wake field of a laser field the authors show a spectrum of continuous hard x-rays and K α x-rays as a function of laser intensity between 10 Wcm This is shown with the.

Generation of X-rays from Laser-Produced Plasmas X-ray radiating plasma generation Generating X-rays with a pulsed laser is possible on any matter if the focal intensity is greater than W/cm2 for a nanosecond pulse [2]. For higher intensities, higher temperatures are obtained and thus shorter wavelengths for the emitted X-rays.

In this. Abstract Hard x-ray spectrum from a one-fluid laser plasma model book shape and intensity of the continuous X-ray spectrum of a laser plasma are calculated in the keV range. The spectral calculations are based on a hydrodynamic analysis of the laser corona, with allowance for ionization kinetics; it is assumed that there are anomalously small values of electron thermal conductivity near the critical point.

Abstract Hard X-ray spectra from laser-produced plasmas were recorded by a transmission crystal survey spectrometer covering the 12 keV to 60 keV energy range with a resolving power of F/δE{nearly equal to} This emission is of interest for the development of hard X-ray backlighters and hot electron by: X-ray spectroscopy involves the transition from ground state to excited state in XAS (X-ray absorption spectroscopy) or probes the decay process in XES (X-ray emission spectroscopy), assumed as ideal method for the description of chemical nature, oxidation states of metallic NPs and environment of associated atoms in molecules [48].X-ray absorption near-edge structure (XANES) has been.

X-ray conversion efficiency can be increased by using a short-wavelength laser, i.e., by tripling the frequency of a Nd:glass laser. The x-ray spectrum may contain strong line components and the production of such monochromatic x-rays can be maximized by creating a plasma that is populated predominantly with the relevant by: 2.

One example of x-ray source from laser-plasma acceleration is betatron x-ray radiation, which has potential for many applications [9, 10]. This source is typically produced with ultrashort (laser pulses, at intensities above 10 18 W cm −2. An Introduction to the Atomic and Radiation Physics of Plasmas; Evidence for strong cyclotron line emission in hard X-ray spectrum of Hercules X1.

Astrophys. J., (3), Creation and diagnosis of a soliddensity plasma with an X-ray free-electron laser. Nature, (), Cited by: 3. In addition, simulations for a hard x-ray spectrum having keV average energy were performed to investigate the substrate electron effects in hard x-ray lithography.

In the experiments, it was. Creation and diagnosis of a solid-density plasma with an X-ray free-electron laser S. M Ka emission spectrum contains information on the CSD of the hot Creation and diagnosis of a solid. data. The soft, subkilovolt x-ray spectrum emitted from a laser­ produced plasma is an important in­ dicator of the plasma temperature.

Measuring this spectrum provides us with invaluable and otherwise unob­ tainable information about plasma conditions in an IeF experiment.

IeF implosion diagnostics are chal­ lenging because the signals File Size: 1MB. X-rays make up X-radiation, a form of high-energy electromagnetic X-rays have a wavelength ranging from 10 picometres to 10 nanometres, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×10 16 Hz to 3×10 19 Hz) and energies in the range eV to keV.X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays.

Laser-driven Plasma X-ray Source for Pump-Probe Spectroscopy and Imaging. A fs-pulsed laser-induced plasma X-ray source (PXS) generating hard Xray radiation in the - energy range of 3 24 keV has been installed and commissioned at ELI beamlines.

The compact table-top PXS will provide a wide range of experimental setups for scientists and. Study of X-ray Spectrum of Laser-produced Gold Plasmas and intensities of X-ray spectral lines emitted in the range to angstroms by a target made of gold alloyed to a few percent of aluminium irradiated by a laser pulse.

Aluminium yields the wavelength calibration and a monitoring of the temperature and the density of the plasma. derived from a high-fluence laser plasma source (LPS) of soft x rays instead of a synchrotron radia-tion source.

A LPS has been used as the illumina-tion source for soft-x-ray microscopy.3 It offers significant advantages of size and cost over synchro-tron sources but with some trade-offs. The intent. The emerging technology of soft x-ray lasers has novel applications to microscopy, lithography, and other fields.

This article describes the status of soft x-ray laser research with the aim of bringing the rapid developments in this field to the attention of potential users in other disciplines. The different techniques for generating a population inversion and producing a soft x-ray laser are Cited by:   The spectra presented here have been corrected for all material transmissions in the x-ray beam path and for the sensitivity and charge redistribution in the CCD as described by Fullagar et al.

30 Fig. 2(a) shows the x-ray spectrum from our laser-plasma source as a function of laser pulse energy for a constant laser pulse duration of 35 by:   Laser-wakefield accelerators (LWFAs) are high acceleration-gradient plasma-based particle accelerators capable of producing ultra-relativistic electron Cited by: 2.

A multilayer-based optic was tested for use as an X-ray diagnostic on a laser-plasma experiment. The multilayer optic was employed to selectively pass X-rays between 55 and keV. An order of magnitude improvement in signal-to-noise ratio is achieved compared to a transmission crystal spectrometer.

A multilayer response model, taking into account the source size and spectral content, Cited by: 3. Quantitative measurement of hard x-ray spectra for high intensity laser produced plasma Rev.

Sci. Instrum. 83, () X-ray conversion efficiency in vacuum hohlraum experiments at the National Ignition Facility Phys.

Plas (). with, and where θ x,y,z are the angles between the laser propagation direction and the space coordinate axes x, y, and z. Moreover, n c is the critical density of plasma, is the plasma density at the laser incidence point (x 0, y 0).The parameter is the distance between the projection of the incident laser pulse and the plasma channel centre.

When an ultrashort, ultraintense laser pulse Cited by: The ultra-bright femtosecond X-ray pulses provided by X-ray free electron lasers (XFELs) open up opportunities to study the structure and dynamics of a wide variety of systems beyond what is possible with synchrotron : Hardcover.

X-ray lasers have evolved quite a bit since this circa image. More than 50 years ago, when the laser was a mere 5 years old, laser physicists dreamed of the development of an X-ray laser. Another laser-driven x-ray source is an x-ray laser, which is driven by electronic transitions in highly stripped ions.

X-rays lasers do have the best coherence properties and are currently the brightest monochromatic sources in the extreme-ultraviolet region of the spectrum, but they do not scale to the hard x-ray regime. Experimental work on laser plasma based X-ray lithography is presented, aimed at the development of a compact lithographic work station for VLSI pattern transfer.

The results are obtained with a frequency doubled low repetition rate Nd:YAG/glass laser ( nm, J, 14 ns) with a power density at the laser focus of x 10 12 W/cm by: 1.

We describe a laser-driven x-ray plasma source designed for ultrafast x-ray absorption spectroscopy. The source is comprised of a 1 kHz, 20 W, femtosecond pulsed infrared laser and a water target. We present the x-ray spectra as a function of laser energy and pulse duration.

Additionally, we investigate the plasma temperature and photon flux as we vary the laser by: In laser-plasma based particle accelerators, a second laser pulse colliding with the first is used to obtain better control over the injection and subsequent acceleration of electrons.

@article{osti_, title = {Controlling the spectrum of x-rays generated in a laser-plasma accelerator by tailoring the laser wavefront}, author = {Mangles, S P. and Kneip, S and Dover, N P and Najmudin, Z and Schreiber, J and Genoud, G and Burza, M and Kamperidis, C and Persson, A and Wahlstroem, C -G and Cassou, K and Cros, B and Wojda, F}, abstractNote = {By tailoring the.

X-ray laser active media The most often used media include highly ionized plasmas, created in a capillary discharge or when a linearly focused optical pulse hits a solid target. In accordance with the Saha ionization equation, the most stable electron configurations are neon -like with 10 electrons remaining and nickel -like with 28 electrons remaining.

In this thesis, developments towards a compact soft X-ray microscope based on a laser-produced plasma with a liquid droplet target (LDT) are described. With this target system, one of the major drawbacks with laser-produced plasmas (LPP), the emission of debris, can be minimised.

Utilising a spherical, normal-incidence, multilayer mirror as. An ultracompact X-ray source based on a laser-plasma undulator I.A.

Andriyash1, R. Lehe1, A. Lifschitz1, C. Thaury1, J.-M. Rax1,2, K. Krushelnick3 & V. Malka1 The capability of plasmas to sustain ultrahigh electric fields has attracted considerable interest over the last decades and has given rise to laser-plasma engineering.

Today, plasmas. Measurements using Ross filters contained within mrad of the beam center revealed that the x-ray spectrum was centered at 66 ±7 keV with an energy spread of approximately 50% FWHM, fitted with a Gaussian profile, which is peaked (rather than exponentially decaying with increasing energy as in other laser-driven Compton sources) and thus.

The first laser ever built, which produced tight beams of reddish light, was made in Laser light is coherent, meaning that all its waves march side by side in step with one another.A synchrotron source is like an "x-ray laser", while an x-ray tube is like an "x-ray floodlight".

Synchrotron radiation can be "shared". A large synchrotron might have upwards of 50 beam lines and run hundred if not thousands of experiments in one year. Synchrotron facilities are expensive to build, but pay for themselves in sheer volume of.