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Review of Scientific Instruments / Volume 82 / Issue 12 / ARTICLES / Nuclear Physics, Fusion and Plasmas

Rev. Sci. Instrum. 82, 123503 (2011); http://dx.doi.org/10.1063/1.3665931 (6 pages)

A novel zirconium Kα imager for high energy density physics research

K. U. Akli1, M. Sanchez del Rio2, S. Jiang1, M. S. Storm1, A. Krygier1, R. B. Stephens3, N. R. Pereira4, E. O. Baronova5, W. Theobald6, Y. Ping7, H. S. McLean7, P. K. Patel7, M. H. Key7, and R. R. Freeman1

1The Ohio State University, Columbus, Ohio 43210, USA
2European Synchrotron Radiation Facility, France
3General Atomics, San Diego, California 92121, USA
4Ecopulse Inc., Springfield, Virginia 22152, USA
5RRC Kurchatov Institute, Moscow, Russia
6Laboratory for Laser Energetics, Rochester, New York 14623, USA
7Lawrence Livermore National Laboratory, Livermore, California 94550, USA

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(Received 11 October 2011; accepted 15 November 2011; published online 12 December 2011)

We report on the development and characterization of a zirconium Kα imager for high energy density physics research. The imager consists of a spherically bent quartz crystal operating at 15.7 keV photon energy. We compare the performance of the imager in terms of integrated reflectivity (Rint) and temperature dependent collection efficiency (ηTe) to that of the widely used Cu Kα imager. Our collisional-radiative simulations show that the new imager can be reliably used up to 250 eV plasma temperature. Monte Carlo simulations show that for a 25 μm thick tracer layer of zirconium, the contribution to Kα production from photo-pumping is only 2%. We present, for the first time, 2D spatially resolved images of zirconium plasmas generated by a high intensity short pulse laser interacting with Zr solid targets.

© 2011 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. DEVELOPMENT OF THE ZIRCONIUM IMAGER
  3. TEMPERATURE SENSITIVITY OF Zr Kα IMAGING EFFICIENCY USING A SPHERICAL BRAGG REFLECTING CRYSTAL
    1. Reflectivity and rocking curve calculations
    2. Shifting and broadening of Kα emission lines with increasing plasma temperature
    3. Collection efficiency and effective integrated reflectivity of the Bragg imagers
  4. CONTRIBUTION OF PHOTO-PUMPING TO Kα PRODUCTION
  5. FIRST IMAGES OF LASER-GENERATED ZIRCONIUM PLASMAS
  6. CONCLUSION

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KEYWORDS and PACS

Keywords

Monte Carlo methods, plasma collision processes, plasma density, plasma diagnostics, plasma light propagation, plasma simulation, plasma temperature

PACS

  • 52.70.-m

    Plasma diagnostic techniques and instrumentation

  • 52.20.-j

    Elementary processes in plasmas

  • 52.25.-b

    Plasma properties

  • 52.40.Db

    Electromagnetic (nonlaser) radiation interactions with plasma

  • 52.65.-y

    Plasma simulation

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3665931

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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