Demonstration Lasing in "Water Window" at 3.4 nm in Transition to Ground State of CVI Ions

abstracteccs - 0754651。目的：本提案的目的是在所谓的重组方案中开发一种3.4 nm的紧凑（“桌面”）软x射线激光器（SXL），以过渡到类氢CVI离子的基态。这种紧凑的3.4 nm激光器将为软x射线显微镜在2.3 - 4.4 nm光谱区域（即所谓的“水窗”）应用于生物细胞研究提供一个非常有用的光源。知识优势：使用基态跃迁作为激光跃迁的主要吸引力之一是其有利的较短波长缩放。实现激光照射是可能的。水窗吗?通过使用相对中等功率的激光器，以相当高的重复率作为泵浦。最近，我们的大量计算表明，使用峰值强度为Ip ~ 1019瓦特/平方厘米的超短激光脉冲，在CVI离子中实现高增益的可行性。更广泛的影响：以5 - 10hz重复频率工作的紧凑3.4 nm x射线激光器将在生物，物理和化学研究中具有许多重要应用。这也将打开一条道路。到开发波长更短的未来紧凑型x射线激光器。教育效益：本研究提供了一个极好的教学和培训研究生的机会，也为非常先进的本科生，在基本的激光和等离子体理论和实验领域。这种兴奋来自于使用异常高的激光强度和超短脉冲的潜力。

ABSTRACTECCS-0754651S. Suckewer, Princeton UniversityObjective: The objective of this proposal is to develop a compact ("table top") soft x-ray laser (SXL) at 3.4 nm in transition to ground state of hydrogen-like CVI ions in so called recombination scheme. Such a compact 3.4 nm laser would provide a very useful source for soft X-ray microscopy in application to biological cell studies in 2.3 - 4.4 nm spectral region, the so called "water window". Intellectual Merit: One of the main attractions of using the transition to ground state as the lasing transition is its favorable scaling to shorter wavelengths. It is possible to achieve lasing within the ?water window? by using lasers with relatively moderate power at quite high repetition rate as pumps. Recently, our very extensive calculations have shown the feasibility of achieving high gain with the transient recombination scheme in the CVI ions using ultrashort laser pulses with peak intensity in the order of Ip ~ 1019 Watt/cm2 .Broader Impact: A compact 3.4 nm X-ray laser operating at 5 -10 Hz repetition rate will have a number of important applications in biological, physical and chemical studies. It will also open a ?path? to developing future compact X-ray lasers with much shorter wavelengths.Educational Benefits: The proposed research provides an excellent opportunity for teaching and training graduate students, and also for very advanced undergraduate students, in the areas of basic laser and plasma theory and experiments. The excitements arise from the potential of working with unusually high laser intensities and ultrashort pulses.