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首页> 外文期刊>Physics of plasmas >Development of the laser evaporation ion source for lithium beam generation on the Particle Beam Fusion Accelerator (PBFA-II)
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Development of the laser evaporation ion source for lithium beam generation on the Particle Beam Fusion Accelerator (PBFA-II)

机译：粒子束聚变加速器（PBFA-II）上用于锂离子束产生的激光蒸发离子源的开发

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The Laser Evaporation Ion Source (LEVIS) active lithium ion source has been developed for use on the focusing ion diode operated on the 10 TW Particle Beam Fusion Accelerator-II (PBFA-II) [J. P. VanDevender and D. L. Cook, Science 232, 831 (1986)] at Sandia National Laboratories. The source configuration consists of two laser pulses impinging on a heated (200 degrees C) thin-film LiAg layer on the anode surface. A short-pulse Nd:YAG laser creates a high-density vapor, which is then ionized by a long-pulse dye laser using the LIBORS (laser ionization based on resonant saturation) ionization method. Small-scale experiments determined that this dual laser-based approach can produce a source plasma of adequate density and confinement for acceleration and transport. Hardware modifications were undertaken to correct problems of premature impedance collapse and lack of beam lithium seen on previous PBFA-II experiments. As much as 85 kJ of Li is measured at the beam focus, but the source may not have been operating in a fully active (i.e., preformed) manner. Focusing performance appears superior to a passive LiF ion source operated on PBFA-II with the same magnetic field topology. (C) 1999 American Institute of Physics. [S1070-664X(99)02409-X]. [References: 51]
机译：激光蒸发离子源（LEVIS）活性锂离子源已经开发出来，可用于在10 TW粒子束聚变加速器II（PBFA-II）上运行的聚焦离子二极管[J. P. VanDevender和D. L. Cook，《科学》第232卷，第831页（1986年），来自桑迪亚国家实验室。源配置包括两个激光脉冲，它们照射到阳极表面的加热的（200摄氏度）薄膜LiAg层上。 Nd：YAG短脉冲激光产生高密度的蒸气，然后使用LIBORS（基于共振饱和的激光电离）电离方法，由长脉冲染料激光将其电离。小型实验确定，这种基于双激光的方法可以产生足够密度和受限于加速和传输的源等离子体。进行了硬件修改，以纠正过早的阻抗崩溃和以前的PBFA-II实验中看到的束状锂缺乏的问题。在光束焦点处测得多达85 kJ的Li，但该光源可能未以完全活动（即预先形成）的方式工作。聚焦性能似乎优于在相同磁场拓扑下在PBFA-II上运行的无源LiF离子源。 （C）1999美国物理研究所。 [S1070-664X（99）02409-X]。 [参考：51]

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