Temporal coherence measurements of a seeded GRIP transient Ni-like Mo soft X-ray laser
1 ISMO, Bât. 350, CNRS, Université Paris-Sud 11, Orsay, France
2 NSF Center for EUV Science and Technology Colorado State University, Fort Collins, USA
3 LPGP, Bât. 210, CNRS, Université Paris-Sud 11, Orsay, France
The temporal coherence of seeded and unseeded GRIP transient Ni-like Mo X-ray laser emitting at 18.9 nm was investigated by a wavefront division interferometer. The coherence time of the X-ray laser pulse is found to be of the order of 1.7 ps in the ASE mode and slightly smaller when the amplifier is seeded with a high-order harmonic pulse. The spectral line width is subject to a gain narrowing when increasing the length of the plasma amplifier.
© Owned by the authors, published by EDP Sciences, 2011