Plasma Instabilities in Superconducting Layers

超导层中的等离子体不稳定性

• 批准号: 9014167
• 负责人: Michael Graf
• 金额: $ 2万
• 依托单位: Boston College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-08-01 至 1992-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9014167&HistoricalAwards=false
• 关键词: Plasma; Instabilities; Superconducting; Layers

An experimental search for theoretically predicted plasma wave instabilities in devices consisting of a superconducting layer of YBCO separated from a superconducting layer of niobium by a thin insulating layer is proposed. Theoretical work has shown that when the relative drift velocity between the parallel superconducting layers is large, an amplified plasma mode may exist, and can lose energy by electromagnetic radiation. This effect is similar to the 'two-beam plasma instability' for two- component collisionless plasmas. The research is to search for this effect by a) studying the current-voltage characteristics when a relative drift velocity exists between the two layers, and b) using bolometric detectors at low temperatures to detect the emitted radiation. The effect may have a long-term practical application in the design of generators of nearly monochromatic long-wavelength electromagnetic radiation.

理论预言等离子体波的实验研究 由超导层组成的器件的不稳定性， YBCO与铌的超导层分离， 提出了绝缘层。 理论工作表明， 当平行线之间的相对漂移速度 超导层很大，放大的等离子体模式可以 存在，并且可以通过电磁辐射损失能量。 这 效应类似于“双束等离子体不稳定性”， 组成无碰撞等离子体。 这项研究是为了寻找 通过a）研究电流-电压特性 当两层之间存在相对漂移速度时， B）在低温下使用测辐射热检测器来检测 发射辐射。 其效果可能具有长期的实用性 在近单色光发生器设计中的应用 长波长电磁辐射。