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2 edition of Specifics of interaction of quasistable laser radiation with metals found in the catalog.

Specifics of interaction of quasistable laser radiation with metals

B. M. Zhiryakov

Specifics of interaction of quasistable laser radiation with metals

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  • 19 Currently reading

Published by National Technical Information Service in Springfield, Va .
Written in English


Edition Notes

Statementby B.M. Zhiryakov, A.K. Fannibo, and N.N. Yuryshev.
ContributionsFannibo, A. K., Yuryshev, N. N., United States. Army. Foreign Science and Technology Center.
ID Numbers
Open LibraryOL14836613M

radiation hardness of equiatomic alloys in general. We show that the multielemental composition of the equia-tomic materials slows down dislocation motion in them, leading to a strong (factor of ∼2–3) reduction in radiation damage. Understanding of the actual mechanisms of reduction of radiation damage in the equiatomic metal. Electromagnetic radiation with a frequency of x hz incident on an unknown metal surface causes ejection of photoelectrons with kinetic energies of x . T.O. 33B Figure Illustration of Various Radiation Absorption Interactions. Photoelectric Absorption. When the photons have energies of keV or less, they are readily absorbed by the electrons in the orbital shells of the atoms of the absorber. The energy of the photon is transferred to the electron; often dislodging it from its orbit and the remainder of the . Modelling convective and radiative heat transfer in a glass melting model crucible D. Cepite, A. Jakovics, B. Halbedel Abstract Numerical modelling of thermally and electromagnetically driven semi-transparent glass melt flow in an experimental .


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Specifics of interaction of quasistable laser radiation with metals by B. M. Zhiryakov Download PDF EPUB FB2

This paper presents the results of studies carried out by the authors on the impact of nonlocal scattering upon spatial and time distortions of laser radiation signals mirror-reflected from gratings of a sinusoidal profile and diffusely reflected from rough metal : A.

Dolgina, Alexander Alexeevich Kovalev, Petr S. Kondratenko. Abstract. Many industrials applications require heat transfer studies between a CO 2 laser radiation and a solid material (machining, welding, cutting, surface treatment, shock hardening). With this type of interaction, at high intensity, a plasma occurs in front of the irradiated : C.

Dumas, M. Ghrab, C. Prat, M. Autric. The interaction of focused laser radiation with solids is a complex phenomenon, which is not yet satisfactorily explained and is still under intensive investigation. A great number of variables which affect the LIB emission such as laser pulse duration and shape [8,9], the laser wavelength [lO,l l].

The Review covers recent progress in laser-matter interaction at intensities above 10 18 W cm −2. At these intensities electrons swing in the laser pulse with relativistic energies.

The laser electric field is already much stronger than the atomic fields, and any material is instantaneously ionized, creating plasma. Interaction of a quasi-stationary laser beam with a metal. Minakova, and V. Rudenko, “Some mechanical effects in the interaction of electromagnetic radiation pulses with metals and N.

Yuryshev, “Some deformation effects in the interaction of a laser beam with a metal,” PMTF [Journal of Applied Mechanics and Technical Author: B.

Zhiryakov, A. Fannibo, N. Yuryshev. Calculating the radiation characteristics of accelerated electrons in laser-plasma interactions Article in Physics of Plasmas 23(3) March with 93 Reads How we measure 'reads'. For example, in air, radiation must expend an average energy of eV per ionization.

Consider a keV x-ray photon undergoing a photoelectric interaction. The initial interaction of the photon ionizes one atom, but the resulting energetic electron ionizes approximately 1, additional atoms. Ionization Produced by a Radiation Electron. Generation of harmonics during scattering of laser radiation from a metal surface having an artificially large work function S Varr6f and F Ehlotzkyj t Institute for Solid State Research of the Hungarian Academy of Sciences, PO H.

Budapest, Hungary Institute for Theoretical Physics, University of Innsbruck, A Innsbruck. Austria. Molecules absorb electromagnetic radiation in the IR ÆTransition between different states of vibration Selection rules: Interaction between the molecule and radiation is only possible if the electric dipole moment of the molecule changes with time.

Such vibrations are Size: 2MB. interaction of radiation with water molecules within the cell; results in the formation of free radicals OH, H, HO2, which can damage the cell.

lesion. radiation oncology/radiation therapy, surgery and chemotherapy. 3 principal modalities used in the treatment of cancer.

Conditions and results for laser testing of RDX 10 4. Conditions and results for laser testing of tetryl 12 5. Conditions and results for selected-detonated items 12 Figures 1. Test vehicle for laser initiation study 3 2.

Streak camera records of the plasma generated in a vacuum from a focused Q-switched ruby laser 3 Size: 1MB. Title: Strong field interaction of laser radiation: Authors: Pukhov, Alexander: Publication: Reports on Progress in Physics, vol.

66, issue 1, pp. T1 - Strong Radiation-Damping Effects in a Gamma-Ray Source Generated by the Interaction of a High-Intensity Laser with a Wakefield-Accelerated Electron Beam AU - Thomas, A.

AU. Absorption of radiation • Photons (x and g-rays) are absorbed by – Photoelectric effect - dominant interaction at lower energies (diagnostic range) – Compton (incoherent) scattering is the dominant mechanism of interaction for higher energy (therapy range) – Pair production for higher energy (above MeV).

problem from the viewpoint of radiation shielding. In this paper, the bench-mark of the Monte Carlo Particle and Heavy Ion Transport code (PHITS) is described as a technique for evaluating the radiation dose on actual laser-driven accelerator.

EXPERIMENT SETUP The J-KAREN laser system [5] at the Kansai Photon. We examine the formation of a fluorescent plume during pulsed laser irradiation of wide band gap materials at sub-band gap photon energies. We show that fluences near the threshold for plume fluorescence in MgO do not produce adequate electron densities for significant laser-plume interactions via inverse bremsstrahlung processes.

At a wavelength of nm, 30 ns pulse Cited by: 4. characteristic radiation is emitted with an energy equal to the difference between the binding energies involved (secondary radiation) 5. characteristic cascade until atom stabilizes what effect does the secondary radiation produced by photoelectric interaction have on the image.

Nuclear interaction length is the mean distance travelled by a hadronic particle before undergoing an inelastic nuclear interaction. See also. Nuclear collision length; Radiation length; External links. Particle Data Group site. Radiation Assessment • The tests indicate minimal deterioration of tunable lasers at low exposure (10 MeV).

• Modest degradation in the lasing threshold of both device types at high exposures. • Inceasing wavelength instability (10pm) of DFB with increasing exposure (>1x cm-2, 50 MeV).

• Modal structure of the DBR laser is preserved. Numerical modeling of radiation-dominated and quantum-electrodynamically strong regimes of laser-plasma interaction Igor V. Sokolov,1,a) Natalia M. Naumova,2 and John A. Nees3 1Space Physics Research Laboratory, University of Michigan, Ann Arbor, MichiganUSA 2Laboratoire d’Optique Applique´e, UMR ENSTA, Ecole Polytechnique, CNRS, Cited by:   The National Ignition Facility will soon be producing x-ray flux and neutron yields higher than any produced in laser driven implosion experiments in the past.

Even a non-igniting capsule will require x-ray imaging of near burning plasmas at neutrons, requiring x-ray recording systems to work in more hostile conditions than we have encountered in past laser Cited by: Thermogradient mechanism of p–n junction formation by laser radiation in semiconductors Article in Applied Surface Science September with 63.

External Radiation Area Monitoring External active radiation area monitoring shall monitor the time-resolved direction-and energy-dependent charged-particle spectra immediately exterior to the vehicle.

Rationale: to calculate the radiation environment inside the vehicle as part of the crew health risk assessment Size: 2MB. Buy Laser Assisted Nuclear Decay Spectroscopy: A New Method for Studying Neutron-Deficient Francium Isotopes (Springer Theses) on FREE SHIPPING on qualified orders.

Radiation reaction in intense laser pulses:from classical to quantum by Sam Yoffe looking at the pace of development in laser intensity, possibility of exploring new physics such as radiation.

DVD (laser), GPS (atomic clock), MRI These characteristics are revealed in the interaction between matter and radiation 9. Young Double Slit experiment A. Tonomura, J.

Endo, T. Matsuda, T. Kawasaki and H. Ezawa Quantum Theory of Radiation Interactions. Fall Plasma Scattering of Electromagnetic Radiation: Theory and Measurement Techniques - Kindle edition by Sheffield, John, Froula, Dustin, Glenzer, Siegfried H., Neville C.

Luhmann, Jr. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Plasma Scattering of Electromagnetic Cited by: periodic oscillations in radiation from an accretion disk are discussed.

The delay between the flares at various wavelengths is obtained. It is shown that the observational data suggest the existence of the weak laser sources in a two-temperature plasma of an accretion disk. Key words. accretion disc: radiation--radiation mechanisms: thermal 1.

Why is it that you should or should not put a sensor to look at reflected radiation from the Earth at micrometers. Please elaborate on the specific reasons.

Which molecules in the atmosphere are responsible for the maximum absorption of incoming sunlight. This Monograph is concerned with non-ionizing radiation in the radiofrequency (RF) range of the electromagnetic spectrum, i.e.

between 30 kHz and GHz. The corresponding wavelengths – the distance between successive peaks of the RF waves – range from 10 km to 1 mm, respectively. Human exposure to RF radiation can occur from many different sources and. II.2 Radiation back-reaction •In high-energy electron beam interaction with the ultrastrong laser pulse, treated as 1D plane wave field, the initially high value of χ>>1 ensures multiple pair creation.

- The radiation back-reaction, however, splits the initially high value of the invariant, (k p), between all newborn particles. A simple theory is developed to determine threshold intensities for laser-induced dissociation on the basis of experimentally measurable parameters, the total laser power and the reaction volume.

A series of experiments performed for CO 2 laser-induced isotope separation in SF 6 establishes a value for the threshold intensity of MW/cm by: sources of tunable monochromatic hard-energy radiation and therefore are of immediate interest for applications and further theoretical studies.

Since introducing the SASP bent crystals [5], several theoretical and experimental stud-ies have already been performed on the new regime of channeling and the radiation pro-duced [6, 9]. Introduction. Bismuth germanate (Bi 4 Ge 3 O 12 – BGO) is a synthetic material of great interest due to its electro-optic, electro-mechanic and luminescent properties, which give it great applicability as scintillator.Weber and Monchamp associated BGO photoluminescence and radioluminescence to the transition from the level 6p6s (3 P 0,1,2, 1 P 1) to the fundamental Cited by: This thesis is concerned with the development and spectroscopic applications of a broadly tunable (tunable range 14THz), narrow-bandwidth (MHz), laser-based, table-top source of far-infrared radiation.

It also describes a vacuum-ultraviolet-far-infrared double-resonance spectrometer in which this new source of radiation was integrated. This. 3rd RCM of the CRP on “PWI with Irradiated W and W-Alloys in Fusion Devices”, Vienna, Austria, TDS theory: re-trapping effect 6 If the trap concentration is small, re-trapping is negligble, and situation is close to one-step situation and de-trapping energy Edt can be determined from experiment.

If the trap concentration is high, than one can show that the shift. ppm-m for DA and ~11 ppm-m for WMS. To study the radiation profiles of the corresponding flat flame, a calibrated high speed infrared camera with three bands is used to capture CO 2 and H 2O radiation intensity.

Quantitative images of radiation intensity for the flame at equivalence ratio to are documented and : Weichao Wang. Thanks Gowtham for A2A. I am not sure if such generalized statement is true. Different materials and metals have different absorbance at different frequencies of the incident electromagnetic radiation.

There are different ways of quantifying the. SPECTROSCOPY. Introduction. A variety of the instruments that are commonly used to analyze food materials are based on spectroscopy, e.g., UV-visible, fluorescence, atomic, infrared and nuclear magnetic resonance instruments utilize interactions between electromagnetic radiation and matter to provide information about food properties, e.g.

Six multilayered films with overall compositions of Co10Zr80Nb10, Co10Zr70Nb20, Co20Zr70Nb10, Co30Zr60Nb10, Co20Zr60Nb20 and Co10Zr60Nb30 were first prepared by alternatively depositing high pure metals onto the NaCl single crystal substrates and then irradiated by keV xenon ions with the doses ranging from 2× Xe+/cm2 to 9× Author: S.H.

Liang, N. Li, N. Ding, J.H. Li, B.X. Liu. Starting from the foundation of quantum mechanics and its applications in simple discrete systems, it develops the basic principles of interaction of electromagnetic radiation with matter.

Topics covered are composite systems and entanglement, open system dynamics and decoherence, quantum theory of radiation, time-dependent perturbation theory.Suppose that a high power laser at -- the pump -- propagates parallel to the z-axis and that the Raman medium occupies the half-space.

The spatial rate of change of the Stokes photons at -- the signal -- may be written[6] The Interaction of Radiation and .Radiation Figure 2. Interaction of radiation with matter [M. Miglierini]. In the energy range from visible light to g-rays, then following processes are the main forms of interaction between the photons and matter: Photoelectric effect A photon interacts with a bound electron in an atomic or molecular orbital or in an energy band of aFile Size: 3MB.