U.S.-Switzerland Cooperative Research on Intrinsic Stocha- sticity in Wave-Particle Interactions

该奖项支持科罗拉多大学的劳尔·A·斯特恩博士和加州大学欧文分校的内森·林恩博士与瑞士洛桑联邦理工学院等离子体物理研究中心的M.Q.Tran博士和其他人合作，研究非平衡等离子体向随机性的转变。该计划汇集了在这一领域开展积极项目的研究人员，他们已经在这一主题上成功地进行了合作。将使用独特的、新开发的实验设备，包括一个9米长的完全磁化和超均匀的等离子体柱，它可以作为气体放电(高Te/Ti)和静态(BAII)等离子体运行，以及最新的激光诱导荧光诊断技术。研究将包括离子分支上的等离子体波激发，以及离子速度分布和离子输运的测量，以绘制出波-粒子相互作用期间离子的相空间历史。结果将与数值研究相协调。这个合作项目结合了互补的技能和资源，并利用了洛桑独特的世界级研究设施，该设施是专门为该领域的实验研究而设计的。波粒相互作用中的本征随机性问题是一个发展迅速的学科，它是基础等离子体物理的核心，在天文学和核聚变研究中对等离子体的研究有直接的应用。

This award supports Dr. Raul A. Stern of the University of Colorado and Dr. Nathan Rynn of the University of California at Irvine to collaborate with Dr. M.Q. Tran and others of the Center for Research in Plasma Physics of the Ecole Polytechnique Federale, Lausanne, Switzerland in a study of the transition to stochasticity in non-equilibrium plasmas. The program brings together researchers who are carrying out active projects in this area individually, and have already collaborated successfully on this topic. Use will be made of unique, newly-developed experimental facilities, including a 9-meter long plasma column, fully magnetized and super-uniform, which can operate both as a gas-discharge (high Te/Ti) and a quiescent (BaII) plasma, together with the newest laser-induced fluorescence diagnostic technologies. Research will consist of plasma wave excitation on the ionic branches, together with measurements of ion velocity distributions and ion transport, to map out the phase-space history of ions during wave-particle interactions. Results will be coordinated with numerical studies. This collaborative project combines complementary skills and resources and exploits a unique, world class research facility in Lausanne that was specially designed for experimental studies in this field. The topic of intrinsic stochasticity in wave-particle interactions is a rapidly developing subject; it is central to fundamental plasma physics and it has direct applications to studies of plasmas in astronomy and fusion research.