Summary
A plasma with a modulated density profile at the required electron density for high gain operation could be obtained using a normally incident 300 ps laser pulse followed by a grazing incident 300 ps laser pulse. Sudden heating of the modulated plasma region by another grazing incident 300 fs laser pulse would then yield a highly efficient x-ray laser beam with a defecting angle of 2 mrad and a divergence angle of 3 mrad. Saturation operation of the x-ray laser beam at 32.6 nm could be achieved with a total pump energy of less than 100 mJ.
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Zhao, J., Dong, Q.L., Zhang, J. (2007). Modulation of Plasma Density to Achieve Highly Efficient X-Ray Lasers With Good Beam Quality. In: Nickles, P., Janulewicz, K. (eds) X-Ray Lasers 2006. Springer Proceedings in Physics, vol 115. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6018-2_7
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DOI: https://doi.org/10.1007/978-1-4020-6018-2_7
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