- Conference date: 27-31 May 2002
- Location: Aspen, Colorado (USA)
Numerical codes predict for transient x‐ray lasers (XRL) very high picosecond duration gains [e.g. 1] that are restricted in space to several microns at FWHM. XRL beam propagation in plasma is vital for estimation of the effective gain at the plasma output. In this paper, beam propagation in transient plasmas is analytically studied. General 2‐D formulae are developed for beams in electron density gradient media, including those with the exponential profile that describes the plasma created from a solid target. The gradient is predicted to potentially limit the amplification length within the maximum gain to <2.6 mm in standard experiments. The result given by the analytical model is confirmed by numerical ray tracing of XRL beams within an amplifying medium as it is defined by the full numerical simulation using the EHYBRID code.
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