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首页> 外文会议>Conference on Soft X-Ray Lasers and Applications V; Aug 6-7, 2003; San Diego, California, USA >Efficient Pumping Schemes for High Average Brightness Collisional X-ray Lasers
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Efficient Pumping Schemes for High Average Brightness Collisional X-ray Lasers

机译：高平均亮度碰撞X射线激光器的有效泵浦方案

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摘要

Advances in transient collisional x-ray lasers have been demonstrated over the last 5 years as a technique for achieving tabletop soft x-ray lasers using 2 ― 10 J of laser pump energy. The high peak brightness of these sources operating in the high output saturation regime, in the range of 10~(24) ― 10~(25) ph. mm~(-2) mrad~(-2) s~(-1) (0.1% BW)~(-1), is ideal for many applications requiring high photon fluence in a single short burst. However, the pump energy required for these x-ray lasers is still relatively high and limits the x-ray laser repetition rate to 1 shot every few minutes. Higher repetition rate collisional schemes have been reported and show some promise for high output in the future. We report a novel technique for enhancing the coupling efficiency of the laser pump into the gain medium that could lead to enhanced x-ray inversion with a factor of ten reduction in the drive energy. This has been applied to the collisional excitation scheme for Ni-like Mo at 18.9 nm and x-ray laser output has been demonstrated. Preliminary results show lasing on a single shot of the optical laser operating at 10 Hz and with 70 mJ in the short pulse. Such a proposed source would have higher average brightness, ～10~(14) ph. mm~(-2) mrad~(-2) s~(-1) (0.1% BW)~(-1), than present bending magnet 3rd generation synchrotron sources operating at the same spectral range.
机译：在过去的5年中，瞬态碰撞X射线激光器取得了进步，这是一种使用2到10 J的激光泵浦能量来实现台式软X射线激光器的技术。这些光源在高输出饱和状态下工作的高峰值亮度，在10〜（24）〜10〜（25）ph范围内。 mm〜（-2）mrad〜（-2）s〜（-1）（0.1％BW）〜（-1）非常适合许多需要在单个短脉冲中具有高光子通量的应用。但是，这些X射线激光器所需的泵浦能量仍然相对较高，并且将X射线激光器的重复频率限制为每几分钟发射1次。已经报道了更高的重复率碰撞方案，并显示出未来高产量的一些希望。我们报告了一种新技术，用于提高激光泵到增益介质中的耦合效率，这可以导致驱动能量减少十倍的增强的X射线反演。这已应用于18.9 nm的Ni形Mo的碰撞激发方案，并已证明了X射线激光的输出。初步结果显示，以10 Hz且短脉冲中具有70 mJ的光激光器单次发射激光。这样建议的光源将具有更高的平均亮度，约为ph〜10〜（14）。 mm〜（-2）mrad〜（-2）s〜（-1）（0.1％BW）〜（-1），比目前的弯曲磁体第三代同步加速器源在相同的光谱范围内工作。

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