Phys. Rev. Lett. 68, 1527–1530 (1992)MeV x-ray generation with a femtosecond laserReceived 17 December 1991; published in the issue dated 9 March 1992 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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