TITLE

Generation of maximum photon flux at the optimum plasma density in the laser-driven betatron oscillation

AUTHOR(S)
Yoo, Seung Hoon; Kim, Jaehoon; Kim, Jong Uk; Seo, Ju Tae; Hahn, Sang June
PUB. DATE
January 2011
SOURCE
Physics of Plasmas;Jan2011, Vol. 18 Issue 1, p013106
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The plasma density effect on x-ray characteristics from betatron oscillation in a laser wakefield accelerator was studied via two-dimensional particle-in-cell simulations. Inside an ion cavity, accelerated electrons with betatron oscillatory motion produce synchrotron radiation. As the plasma density increases, both bunch charge and betatron oscillation amplitude increase in the laser unmodulated regime and decrease again in the laser modulated regime. The multicavitation and weaker field from the laser modulation result in a smaller bunch charge and a decrease in oscillation amplitude in the modulated regime. The photon flux and critical energy in the wiggler regime, where the ion cavity acts as a wiggler, can be optimized and controlled through plasma density. In this work, the mechanism of the optimum ratio of laser pulse duration to plasma wavelength for maximum photon flux was investigated.
ACCESSION #
57679389

 

Related Articles

  • Controlling the betatron oscillations of a wakefield-accelerated electron beam by temporally asymmetric laser pulses. Nam, Inhyuk; Hur, Min Sup; Uhm, Han Sup; Hafz, Nasr A. M.; Suk, Hyyong // Physics of Plasmas;Apr2011, Vol. 18 Issue 4, p043107 

    Based on two-dimensional particle-in-cell simulations, we investigated the electron beam's transverse oscillations by temporally asymmetric laser pulses in laser wakefield acceleration. Of particular interest in this article are the effects of ultrashort laser pulses having sharp rising and slow...

  • Modeling Laser Wake Field Acceleration with the Quasi-Static PIC Code QuickPIC. Vieira, J.; Tzoufras, M.; Huang, C.; Lu, W.; Zhou, M.; Tsung, F.; Decyk, V. K.; Mori, W. B.; Antonsen, Jr., T.; Cooley, J.; Silva, L. O. // AIP Conference Proceedings;2006, Vol. 877 Issue 1, p235 

    We use the Quasi-static Particle-In-Cell code QuickPIC to model laser wake field acceleration, in both uniform and parabolic plasma channels within current state of the art experimental laser and plasma parameters. QuickPIC uses the quasi-static approximation, which allows the separation of the...

  • Microfocused X-rays Beams Using Compound Refractive Lenses: Possibilities for Indus-2. Tiwari, M. K.; Lodha, G. S. // AIP Conference Proceedings;7/16/2011, Vol. 1349 Issue 1, p471 

    For the generation of micro focused hard x-ray beams on Indus-2, with large depth of focus and large focal lengths, simulation studies have been performed using parabolic Be compound refractive lenses (CRLs). The use of these lenses is expected to open many new experimental possibilities widely...

  • Variable profile capillary discharge for improved phase matching in a laser wakefield accelerator. Kaganovich, D.; Sasorov, P. // Applied Physics Letters;8/9/1999, Vol. 75 Issue 6, p772 

    Reports on the possibility of generating long plasma channels with a variable plasma density profile in a longitudinal direction. Control by the plasma channels of the velocity of the guided high-intensity laser beams; Measurement of plasma density profiles at the capillary exit; Importance of...

  • Multitone harmonic-balance simulations of an x-ray transition-edge sensor characterized at BESSY II. Rostem, K.; Goldie, D. J.; Withington, S.; Hoevers, H. F. C.; Gottardi, L.; Van der Kuur, J. // Journal of Applied Physics;Aug2010, Vol. 108 Issue 2, p024509 

    We present multitone harmonic-balance (MTHB) simulations of a Ti–Au x-ray transition-edge sensor (TES) microcalorimeter in a 5×5 pixel spectrometer array. The dynamic response of the TES microcalorimeter under simulation has been extremely well characterized at the BESSY II...

  • Influence of betatron oscillations on magnetic bremsstrahlung. Shishanin, O. E. // Technical Physics;Nov98, Vol. 43 Issue 11, p1393 

    A description of the motion of an electron in an accelerator is discussed in relation to the problem of synchrotron radiation. Spectral–angular distributions of the radiation intensity are obtained that depend strongly on vertical oscillations of the electron. © 1998 American Institute...

  • Micro-Soft X-Ray Spectroscopy with the LUCIA Beamline. Lagarde, P.; Flank, A.-M.; Vantelon, D.; Janousch, M. // AIP Conference Proceedings;2007, Vol. 882 Issue 1, p852 

    With the development of new synchrotron radiation machines, which have seen, in the last ten years, the emittance of the beam decreased by several orders of magnitude, new beamlines have been developed which make full use of these improvements. We describe here the LUCIA beamline, which has been...

  • Effect of target composition on proton acceleration in ultraintense laser-thin foil interaction. Liu, Qingcao; Liu, Meng; Yu, Tongpu; Ding, Pengji; Liu, Zuoye; Sun, Shaohua; Liu, Xiaoliang; Lu, Xing; Guo, Zeqin; Hu, Bitao // Physics of Plasmas;Sep2012, Vol. 19 Issue 9, p093108 

    The interactions of ultraintense circularly polarized laser pulses with a mixed solid target and a double-layer target are studied by two-dimensional particle-in-cell simulations. Different carbon and proton compositions in the targets are used in the simulations. It is shown that the proton...

  • Numerical study of 1.1 GeV electron acceleration over a-few-millimeter-long plasma with a tapered density. Hur, Min Sup; Suk, Hyyong // Physics of Plasmas;Mar2011, Vol. 18 Issue 3, p033102 

    We present two-dimensional particle-in-cell simulations of laser wakefield electron acceleration up to 1.1 GeV over a-few-millimeter-long plasma with the help of density tapering. We observed that, in a uniform plasma, the electron beam reaches the dephasing state not only by the slow phase...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics