The Motional Stark Effect with Laser-Induced Fluorescence Diagnostic

被引：4

作者：

Foley, E. L. ^{[1
]}

Levinton, F. M. ^{[1
]}

机构：

[1] Nova Photonics Inc, Princeton, NJ 08540 USA

来源：

14TH INTERNATIONAL SYMPOSIUM ON LASER-AIDED PLASMA DIAGNOSTICS (LAPD14) | 2010年 / 227卷

关键词：

MAGNETIC-FIELD; PLASMAS; BEAM;

D O I：

10.1088/1742-6596/227/1/012007

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The motional Stark effect (MSE) diagnostic is the worldwide standard technique for internal magnetic field pitch angle measurements in magnetized plasmas. Traditionally, it is based on using polarimetry to measure the polarization direction of light emitted from a hydrogenic species in a neutral beam. As the beam passes through the magnetized plasma at a high velocity, in its rest frame it perceives a Lorentz electric field. This field causes the H-alpha emission to be split and polarized. A new technique under development adds laser-induced fluorescence (LIF) to a diagnostic neutral beam (DNB) for an MSE measurement that will enable radially resolved magnetic field magnitude as well as pitch angle measurements in even low-field (<1 T) experiments. An MSE-LIF system will be installed on the National Spherical Torus Experiment (NSTX) at the Princeton Plasma Physics Laboratory. It will enable reconstructions of the plasma pressure, q-profile and current as well as, in conjunction with the existing MSE system, measurements of radial electric fields.

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页数：6

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