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Journal of Applied Physics / Volume 98 / Issue 12 / PLASMAS AND ELECTRICAL DISCHARGES

J. Appl. Phys. 98, 123302 (2005); http://dx.doi.org/10.1063/1.2148619 (6 pages)

Compact soft x-ray source using Thomson scattering

Shigeru Kashiwagi1, Ryunosuke Kuroda1, Takashi Oshima1, Fumio Nagasawa1, Tomoaki Kobuki1, Daisuke Ueyama1, Yoshimasa Hama1, Masakazu Washio1, Kiminori Ushida2, Hitoshi Hayano3, and Junji Urakawa3

1Advanced Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan
2RIKEN (The Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
3KEK (High Energy Accelerator Research Organization), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan

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(Received 2 March 2005; accepted 9 November 2005; published online 28 December 2005)

A compact soft x-ray source using Thomson scattering, enabled by the combination of a picosecond laser and an electron rf gun, was developed aiming at biological studies such as those using an x-ray microscope. The x-ray source included both a photoinjector system and a picosecond laser system with a tabletop size of 2×2 m2. An infrared laser beam (λ0 = 1047 nm) was obtained from an all-solid-state mode-locked Nd:YLF laser system and injected into the photocathode of an accelerator system. A 4.2 MeV electron beam was generated from a laser-driven photocathode rf gun system. The residual laser beam was amplified up to about 4.2 mJ/pulse using a flash-lamp-pumped laser amplifier. Upon collision of the electron beam with the amplified laser beam, 300 eV soft x rays were generated by Thomson backscattering. The stable interaction between the two beams was achieved using the same seed laser pulse for irradiating the photocathode and the scattering process with laser photons.

© 2005 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. PRINCIPLES: CHARACTERISTICS OF LASER THOMSON SCATTERING
  3. METHODS: SOFT X-RAY GENERATION
    1. High-quality electron beam generation and laser amplifier system
    2. Timing adjustment and x-ray detection
  4. RESULTS AND DISCUSSION
  5. CONCLUSION

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KEYWORDS and PACS

Keywords

X-ray optics, Thomson effect, solid lasers, laser beams, laser mode locking, neodymium, yttrium compounds, photocathodes, electron beams, backscatter

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2148619

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

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

For access to fully linked references, you need to log in.
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