MeV x-ray generation with a femtosecond laser
J. D. KmetecE. L. Ginzton Laboratory, Stanford University, Stanford, California 94305C. L. GordonE. L. Ginzton Laboratory, Stanford University, Stanford, California 94305J. J. MacklinE. L. Ginzton Laboratory, Stanford University, Stanford, California 94305B. E. LemoffE. L. Ginzton Laboratory, Stanford University, Stanford, California 94305G. S. BrownE. L. Ginzton Laboratory, Stanford University, Stanford, California 94305Stephen HarrisE. L. Ginzton Laboratory, Stanford University, Stanford, California 94305
1992en
ABI
Abstract
A 0.5-TW, 120-fs Ti:sapphire laser, when focused to greater than ${10}^{18}$ W/${\mathrm{cm}}^{2}$ 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.
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Cited by 20 references