Development of 4.8 nm Laser in Transition to Ground State of BV Ions

摘要 （ECS - 0080641）拟议研究的主要目标是开发一种紧凑的4.8 nm激光器，在类氢BV离子中过渡到基态。 这一概念是软X射线激光器（SXL）向更短波长的延伸，该激光器在普林斯顿大学在13.5 nm的类H LiIII中过渡到基态时得到了证明。13.5 nm的SXL仅使用50 mJ、250 fsec的泵浦光束（强度：1-2 x）以2 Hz的重复率工作。 用于证明4.8 nm SXL的高增益长度积（GL）的程序和实验装置与13.5 nm SXL相同，除了需要更高的强度（~）。 这样的强度将可从我们的系统通过我们的12岁的KrF大容量放大器的翻新。 在类氢BV离子的基态跃迁中的4.8nm激光器将是最短波长的紧凑、非常有效的X射线激光器（“桌面”X射线激光器）。 在4.8 nm处的激光发射的证明将是向类H Li III离子的基态过渡的13.5 nm激光的更短波长的最直接的延伸。在类H BV离子中开发4.8 nm将为在较短波长下开发这种类型的激光器（在“水窗”中的CVI中为3.4 nm，甚至在更短的波长下）提供关键的缩放点。

ABSTRACT ( ECS - 0080641)The main goal of the proposed research is the development of a compact 4.8 nm laser in a transition to the ground state in hydrogen-like BV ions. This concept is an extension toward shorter wavelength of the Soft X-ray Laser (SXL),which was demonstrated at Princeton in transition to the ground state in H-like LiIII at 13.5 nm.The 13.5 nm SXL operates at a repetition rate of 2 Hz using only a 50 mJ, 250 fsec pumping beam (intensity: 1-2 x ). The procedure and experimental set-up for the demonstration of high gain-length product (GL) for the 4.8 nm SXL is the same as that of the 13.5 nm SXL, except much higher intensities are required (~ ). Such intensities will be available from our system through the refurbishing of our 12-year old KrF large volume amplifier. The 4.8 nm laser in transition to ground state of hydrogen-like BV ions would be the shortest wavelength compact, very efficient X-ray laser ("Table top" X-ray laser). Demonstration of the lasing at 4.8 nm would be the most straight-forward extension to shorter wavelength of 13.5 nm laser in transition to ground state of H-like Li III ions. Development of 4.8 nm in H-like BV ions will provide crucial scaling point for the development of this type of lasers at shorter wavelength (at 3.4 nm in CVI in "water window" and at even shorter wavelengths).