首页> 外文会议>Conference on Soft X-Ray Lasers and Applications V; Aug 6-7, 2003; San Diego, California, USA >Advances in collisionally pumped optical-field-ionization soft x-ray lasers
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Advances in collisionally pumped optical-field-ionization soft x-ray lasers

机译:碰撞泵浦光场电离软X射线激光器的研究进展

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We give an overview of recent results on optical-field-ionization collisional soft X-ray lasers developed at LOA. By focusing a 30-fs, circularly polarized Ti-sapphire laser pulse at an intensity of up to 8 x 10~(17) Wcm~(-2) into a low-density gas cell containing xenon or krypton, we produced a few mm long plasma column for soft X-ray amplifier. Saturated amplification has been achieved on the 4d~95d(~1S_0) - 4d~95p(~1P_1) transition at 41.8 nm in Pd-like Xe, and strong lasing at 32.8 nm on the 3d~9d(~1S_0) - 3d~94p(~1P_1) transition in Ni-like Kr has been demonstrated. Under optimum pumping conditions the Xe IX laser provides about 5 x 10~9 photons per pulse while the Kr IX laser delivers up to (2-3) x 10~9 photons per shot. The repetition rate of these X-ray lasers is 10 Hz. The experimental results are discussed and compared to computational simulations in which issues related to plasma formation, electron energy distribution, and atomic processes are addressed.
机译:我们概述了LOA开发的光场电离碰撞软X射线激光器的最新结果。通过将强度高达8 x 10〜(17)Wcm〜(-2)的30fs圆偏振钛蓝宝石激光脉冲聚焦到包含氙或k的低密度气室中,我们产生了几毫米长等离子柱,用于软X射线放大器。在Pd状Xe中在41.8 nm处的4d〜95d(〜1S_0)-4d〜95p(〜1P_1)跃迁上实现了饱和放大,在3d〜9d(〜1S_0)-3d〜上的32.8 nm处发生了强激光发射已证明在Ni状Kr中有94p(〜1P_1)跃迁。在最佳泵浦条件下,Xe IX激光器每个脉冲提供约5 x 10〜9个光子,而Kr IX激光器每次发射可提供多达(2-3)x 10〜9个光子。这些X射线激光器的重复率为10 Hz。讨论了实验结果,并将其与计算仿真进行了比较,在计算仿真中解决了与等离子体形成,电子能量分布和原子过程有关的问题。

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