Abstract
A plasma with a valley density profile at the required electron density for high-gain operation of an x-ray laser could be obtained using a normally incident laser pulse followed by a grazing-incident laser pulse. Sudden heating of the valley plasma region by another grazing-incident laser pulse would then yield a highly efficient x-ray laser beam with a deflecting angle of and a divergence angle of . Saturation operation of the x-ray laser beam at could be achieved with a total pump energy of less than .
© 2007 Optical Society of America
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