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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 7, Iss. 2 — Jan. 10, 2009
  • pp: 156–158

Laser-produced plasma He-alpha source for pulse radiography

Ruirong Wang, Weimin Chen, Chusheng Mao, Jiaqin Dong, and Sizu Fu  »View Author Affiliations

Chinese Optics Letters, Vol. 7, Issue 2, pp. 156-158 (2009)

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Through the use of time and space integrated kiloelectronvolt (keV) spectroscopy, we investigate the thermal emission of plasma, which produces strong line emission from the titanium K shell (He-\alpha at 4.7 keV and H-alpha at 4.9 keV), created by laser. In order to optimize the conversion efficiency enhancement on titanium foils, the experiment is conducted under a variety of laser-driven intensity conditions. The X-ray emission intensity at 4.7 keV is measured and compared with prediction. The experimental result demonstrates that the solid Ti target laser-produced plasma (LPP) source has X-ray emission at 4.7 keV, which are all generated from electronic transitions in Ti ions at pulse width of 2.1 ns or 30 ps, the crudely evaluated He-\alpha X-ray intensity appears to slightly increase with laser intensity enhancement, and the pre-pulse effect increases the conversion efficiency of the He-\alpha X-ray. In addition, a 90-\mum-thick Ti foil as a filter is used to transmit He-\alpha X-ray at near 4.7 keV, creating a quasi-monochromatic transmission and greatly reducing the lower- and higher-energy background.

© 2009 Chinese Optics Letters

OCIS Codes
(040.7480) Detectors : X-rays, soft x-rays, extreme ultraviolet (EUV)
(300.6560) Spectroscopy : Spectroscopy, x-ray
(350.5400) Other areas of optics : Plasmas

Ruirong Wang, Weimin Chen, Chusheng Mao, Jiaqin Dong, and Sizu Fu, "Laser-produced plasma He-alpha source for pulse radiography," Chin. Opt. Lett. 7, 156-158 (2009)

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