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Phys. Rev. Lett. 68, 1527 - 1530 (1992)

MeV x-ray generation with a femtosecond laser

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J. D. Kmetec, C. L. Gordon, III, J. J. Macklin, B. E. Lemoff, G. S. Brown, and S. E. Harris
E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305

Received 17 December 1991

A 0.5-TW, 120-fs Ti:sapphire laser, when focused to greater than 1018 W/cm2 onto a solid target, creates a plasma which emits radiation that extends beyond 1 meV. The x-ray yield increases as the 3/2 power of the incident laser energy, reaching 0.3% energy conversion to radiation above 20 keV at 40 mJ of laser energy on target. An x-ray spectral distribution of 1/E fits the data for most of the radiation, falling faster at higher photon energies.


©1992 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.68.1527
DOI: 10.1103/PhysRevLett.68.1527
PACS: 52.25.Nr, 42.65.Re, 52.50.Jm

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