Study on magnetized strongly coupled plasmas by using charged fine particles in a liquid

利用液体中的带电微粒研究磁化强耦合等离子体

• 批准号: 11680482
• 负责人: SHOJI Tatsuo
• 金额: $ 1.98万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11680482/
• 关键词: Strongly coupled plasmas; qoulomb solid; phase transition; colloid; maqnetizen fine paticles

A simple two-dimensional (2-D) strongly coupled one-component plasma system has been developed by confining charged fine particles on oil surface.The fine silica (SiO_2 particles placed on the bottom of concave electrode where silicon oil is filed are charged up by applying a voltage with respect to the upper glass electrode which is coated by electro-conductive film (ITO). The particles move upward by the electric field between the electrodes and confined on the oil surface by the surface tension.This new system has several advantages in studying 2-D Coulomb solidification compared with the colloidal suspension in a water: the charge of the particles can be easily controlled by the voltage, the number of impurity ions which shield out the Coulomb potential can be reduced in the insulating oil.We observed the long time evolution of Coulomb crystal growth and the development of defect and dislocation in the crystal. We also study the effect of magnetic dipole interactions among particles by using Ni coated fine particles.

本文建立了一个简单的二维强耦合单组分等离子体系统，该系统将带电微粒限制在油表面上，通过对涂有导电膜（ITO）的上玻璃电极施加电压，使放置在凹电极底部的硅油中的SiO_2微粒带电。颗粒在电极间的电场作用下向上运动，并被表面张力限制在油表面。与水中的胶体悬浮液相比，这种新系统在研究二维库仑凝固方面具有以下几个优点：颗粒的电荷可以容易地通过电压控制，在绝缘油中屏蔽库仑势的杂质离子的数量可以减少，我们观察到库仑晶体生长的长时间演化和缺陷的发展，晶体中的位错我们还研究了磁偶极相互作用的影响，通过使用镍包覆的微粒。

项目成果

T.Shoji: "Two-Dimensional Strongly Coupled Plasma on a Liquid Surface"Proc. of National Institute for Fusion Science. 43. 44-45 (1999)

T.Shoji：“液体表面上的二维强耦合等离子体”Proc。

T.Shoji,K.Shinohe and Y.Sakawa: "Two dimensional strongly coupled plasma experiments using charged ball system"National Institute for Fusion Science,Proc. 43. 44-45 (1999)

T.Shoji，K.Shinohe和Y.Sakawa：“使用带电球系统的二维强耦合等离子体实验”国立核聚变科学研究所，Proc。

T.Shoji: "Two dimensional strongly coupled plasma experiments using charged ball system"National Institute for Fusion Science, Proc. 43. 44-45 (1999)

T.Shoji：“使用带电球系统的二维强耦合等离子体实验”国立核聚变科学研究所，Proc。

T.Shoji: "Two-dimensional strongly coupled plasma on a Solid Surface"Physica Scripta. T89. 41-44 (2001)

T.Shoji：“固体表面上的二维强耦合等离子体”Physica Scripta。