Clear imaging of ion cloud rotation using a combination of a thin metal wire, a micro-channel plate attached to a phosphor screen, and a high-speed camera
Clear imaging of ion cloud rotation using a combination of a thin metal wire, a micro-channel plate attached to a phosphor screen, and a high-speed camera
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DOI：
10.1063/5.0084236
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发表时间：
2022-04
期刊：
影响因子：
1.6
通讯作者：
Y. Nakajima;H. Himura;T. Okada
中科院分区：
文献类型：
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作者：
Y. Nakajima;H. Himura;T. Okada
为了获得纯离子云的离子速度u i（r）的径向分布，我们首次成功地用荧光屏上的微通道板和高速摄像机的组合扫描纯离子云，获得了旋转金属细线阴影的图像。看来，测量的金属丝的旋转角度同意的非中性等离子体的二维平衡理论的基础上的估计值，而不是一个单一的离子在潘宁阱中的磁控运动。这种方法可以用来实验研究非电中性双流体等离子体中的ui（r，t），这是一个先进等离子体物理尚未探索的课题。
To obtain the radial profile of the ion velocity u i( r) of a pure ion cloud, for the first time, we successfully captured images of the shadow of a thin rotating metal wire by scanning the pure ion cloud using a combination of a micro-channel plate attached to a phosphor screen and a high-speed camera. It appears that the rotation angle of the measured metal wire agrees with the estimated value based on the theory of two-dimensional equilibria of non-neutral plasmas, rather than the magnetron motion of a single ion confined in a Penning trap. This method may be utilized as a tool to experimentally investigate u i( r, t) in electrically non-neutral two-fluid plasmas, which is an unexplored topic in advanced plasma physics.