Iraji D, Diallo A, Fasoli A, Furno I, Shibaev S
Ecole Polytechnique Federale de Lausanne, Centre de Recherches en Physique des Plasmas, Association Euratom-Confederation Suisse, CH-1015 Lausanne, Switzerland.
Rev Sci Instrum. 2008 Oct;79(10):10F508. doi: 10.1063/1.2953677.
Fast framing cameras constitute an important recent diagnostic development aimed at monitoring light emission from magnetically confined plasmas, and are now commonly used to study turbulence in plasmas. In the TORPEX toroidal device [A. Fasoli et al., Phys. Plasmas 13, 055902 (2006)], low frequency electrostatic fluctuations associated with drift-interchange waves are routinely measured by means of extensive sets of Langmuir probes. A Photron Ultima APX-RS fast framing camera has recently been acquired to complement Langmuir probe measurements, which allows comparing statistical and spectral properties of visible light and electrostatic fluctuations. A direct imaging system has been developed, which allows viewing the light, emitted from microwave-produced plasmas tangentially and perpendicularly to the toroidal direction. The comparison of the probability density function, power spectral density, and autoconditional average of the camera data to those obtained using a multiple head electrostatic probe covering the plasma cross section shows reasonable agreement in the case of perpendicular view and in the plasma region where interchange modes dominate.
高速分幅相机是近期一项重要的诊断技术发展成果，旨在监测磁约束等离子体的光发射，目前常用于研究等离子体中的湍流。在TORPEX环形装置中[A. Fasoli等人，《物理等离子体》13, 055902 (2006)]，与漂移交换波相关的低频静电涨落通常通过大量朗缪尔探针进行测量。最近购置了一台Photron Ultima APX-RS高速分幅相机，以补充朗缪尔探针测量，这使得能够比较可见光和静电涨落的统计和光谱特性。已开发出一种直接成像系统，可沿环形方向的切线方向和垂直方向观察微波产生的等离子体发出的光。将相机数据的概率密度函数、功率谱密度和自条件平均值与使用覆盖等离子体横截面的多头静电探针获得的数据进行比较，结果表明在垂直视图以及交换模占主导的等离子体区域中两者具有合理的一致性。
