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Valley density profile for highly efficient x-ray lasers with good beam quality

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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 300ps laser pulse followed by a grazing-incident 300ps laser pulse. Sudden heating of the valley plasma region by another grazing-incident 300fs laser pulse would then yield a highly efficient x-ray laser beam with a deflecting angle of 2mrad and a divergence angle of 4mrad. Saturation operation of the x-ray laser beam at 32.6nm could be achieved with a total pump energy of less than 100mJ.

© 2007 Optical Society of America

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