Characterization of a high-brilliance soft x-ray laser at 139 nm by use of an oscillator-amplifier configuration

Abstract

We have improved a highly coherent x-ray laser at 13.9 nm using an oscillator-amplifier configuration. To improve a high-brilliance x-ray laser, we adopted traveling wave pumping for the amplifier target and rotated the amplifier target 3-4 mrad in the counterclockwise direction. Thereby, a seed x-ray laser can be amplified by medium plasma of the amplifier target with a high gain coefficient. The amplified x-ray laser has the output energy of approximately 1.3 microJ, corresponding to a large photon flux of 6.5 x 10(10) photons/pulse and a high peak brilliance of 5 x 10(26) photons/(s x mm(2) x mrad(2) x 0.01% bandwidth).

Nanoscale surface modifications and formation of conical structures at aluminum surface induced by single shot exposure of soft x-ray laser pulse

“…4,5 The Ag tapes were used as the plasma targets, 21 and the tape targets were irradiated by the linearly focusing laser pulses generated from a chirped pulse amplification glass laser system with zigzag slab Nd:glass amplifiers. 22 The soft x-ray seed light generated by the first Ag plasma was amplified with the second Ag plasma.…”

“…[3][4][5][6] Since this SXRL beam has a large output energy of near 1 J / pulse, a fully spatial coherence, and a short duration time of 7 ps, 7-9 many application researches using phenomenal features of the SXRL pulse have been done. The speckle pattern and interference pattern measurements were the research techniques using the features of a spatial coherence and a short duration time of the SXRL pulses.…”

Spallative ablation of dielectrics by X-ray laser

“…The experiment has been performed with the Ne-like Ag soft x-ray laser (XRL) facility at JAEA Kansai Photon Science Institute, working at transient collisional scheme [22,34,35]. The XRL beam with an energy ∼ 1 microJ and the horizontal and vertical divergences of 12 mrad × 5 mrad, respectively, was focused on a LiF crystal of 2 mm thickness and 20 mm diameter, by using a spherical Mo/Si multilayer mirror of 1050 mm radius of curvature (see Fig.…”

Coherent X-ray mirage: discovery and possible applications

“…Recently, using radiation from a plasma-based transient collisional excitation XRL [10] , the observation of an unknown interference structure in the spatial profile of the output beam of a two-stage plasma media XRL has been reported [11] . Such a result led to founding and, after scrupulous theoretical analysis, to understanding this new mechanism, which could have a drastic influence on the spatial characteristics of XRL beams -the formation of X-ray coherent mirages [11] , which are unique phenomena for the X-ray spectral range.…”