Dynamics of Dense X-Pinch and Z-Pinch Plasmas Produced by Pulsed Power Generators

脉冲功率发生器产生的密集 X 箍缩和 Z 箍缩等离子体的动力学

• 批准号: 9113695
• 负责人: David Hammer
• 金额: $ 23.96万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-09-01 至 1994-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9113695&HistoricalAwards=false
• 关键词: Dynamics; Dense; Pinch; Plasmas; Produced

This project is concerned with the dynamics of dense x-pinch and z-pinch plasmas produced by submicrosecond pulsed power generators. An x- pinch consists of at least two fine wires stretched between output electrodes of a high power pulser such that they cross and touch in the form of an X. Powered by 400-500kA, 80ns current pulses, the resulting plasma is a very intense, submillimeter source of soft x-rays (starting with metal wires) or neutrons (starting with deuterated polyethylene fibers). The objective of this study is to understand the dynamics of x-pinch plasmas so that possible applications (e.g., to microlithography, imaging of living cells and determining the spatial resolution of a neutron detector) can be intelligently evaluated. To accomplish this effectively, a pulser designed specifically to power the x-pinch will be built, and dense x-pinch plasmas (as well as the simpler z- pinches for comparison) will be studied with 1ns time and 0.1mm space resolution using optical and x-ray diagnostic techniques. Soft x-ray measurements will be used to probe the dense core plasma, and interferometry and Faraday rotation measurements will probe the surrounding region. The purpose of these measurements is to determine the mass density and current density distributions as a function f time. From these quantities, the various phenomena observed in x-pinch (and z-pinch) implosions can be understood.

这个项目关注的是密集的 产生的x箍缩和z箍缩等离子体 亚微秒脉冲功率发生器 一个x- 箍缩由至少两个细金属丝组成， 在高功率脉冲发生器的输出电极之间 这样它们就以X的形式交叉接触。 采用400- 500 kA，80 ns脉冲电流， 产生的等离子体是一种非常强烈的亚毫米波 软X射线源（从金属线开始）或 中子（从氘代聚乙烯开始 纤维）。 本研究的目的是了解 x箍缩等离子体的动力学， 应用程序（例如，到微光刻，成像， 活细胞和确定的空间分辨率 中子探测器）可以被智能地评估。 到 为了有效地实现这一点，设计了一种脉冲发生器， 专门为x-pinch提供动力， 密集的x箍缩等离子体（以及更简单的z- 夹点比较）将在1 ns时间内进行研究 和0.1mm空间分辨率使用光学和X射线 诊断技术。 软X射线测量将 用于探测稠密的核心等离子体，以及 干涉测量和法拉第旋转测量 会探测周围区域 的目的 这些测量是为了确定质量密度 以及作为时间函数的电流密度分布。 从这些量中， 在x箍缩（和z箍缩）内爆中观察到的， 明白