A collective scattering system for measuring electron gyroscale fluctuations on the National Spherical Torus Experiment

D. R. Smith; E. Mazzucato; W. Lee; H. K. Park; C. W. Domier; N. C. Luhmann

doi:10.1063/1.3039415

A collective scattering system for measuring electron gyroscale fluctuations on the National Spherical Torus Experiment

D. R. Smith, E. Mazzucato, W. Lee, H. K. Park, C. W. Domier, N. C. Luhmann

Plasma Physics Lab

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

Abstract

A collective scattering system has been installed on the National Spherical Torus Experiment (NSTX) to measure electron gyroscale fluctuations in NSTX plasmas. The system measures fluctuations with k⊥ ρ e 0.6 and k⊥ 20 cm^-1. Up to five distinct wavenumbers are measured simultaneously, and the large toroidal curvature of NSTX plasmas provides enhanced spatial localization. Steerable optics can position the scattering volume throughout the plasma from the magnetic axis to the outboard edge. Initial measurements indicate rich turbulent dynamics on the electron gyroscale. The system will be a valuable tool for investigating the connection between electron temperature gradient turbulence and electron thermal transport in NSTX plasmas.

Original language	English (US)
Article number	123501
Journal	Review of Scientific Instruments
Volume	79
Issue number	12
DOIs	https://doi.org/10.1063/1.3039415
State	Published - 2008

All Science Journal Classification (ASJC) codes

Instrumentation

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10.1063/1.3039415

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abstract = "A collective scattering system has been installed on the National Spherical Torus Experiment (NSTX) to measure electron gyroscale fluctuations in NSTX plasmas. The system measures fluctuations with k⊥ ρ e 0.6 and k⊥ 20 cm-1. Up to five distinct wavenumbers are measured simultaneously, and the large toroidal curvature of NSTX plasmas provides enhanced spatial localization. Steerable optics can position the scattering volume throughout the plasma from the magnetic axis to the outboard edge. Initial measurements indicate rich turbulent dynamics on the electron gyroscale. The system will be a valuable tool for investigating the connection between electron temperature gradient turbulence and electron thermal transport in NSTX plasmas.",

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T1 - A collective scattering system for measuring electron gyroscale fluctuations on the National Spherical Torus Experiment

AU - Smith, D. R.

AU - Mazzucato, E.

AU - Lee, W.

AU - Park, H. K.

AU - Domier, C. W.

AU - Luhmann, N. C.

PY - 2008

Y1 - 2008

N2 - A collective scattering system has been installed on the National Spherical Torus Experiment (NSTX) to measure electron gyroscale fluctuations in NSTX plasmas. The system measures fluctuations with k⊥ ρ e 0.6 and k⊥ 20 cm-1. Up to five distinct wavenumbers are measured simultaneously, and the large toroidal curvature of NSTX plasmas provides enhanced spatial localization. Steerable optics can position the scattering volume throughout the plasma from the magnetic axis to the outboard edge. Initial measurements indicate rich turbulent dynamics on the electron gyroscale. The system will be a valuable tool for investigating the connection between electron temperature gradient turbulence and electron thermal transport in NSTX plasmas.

AB - A collective scattering system has been installed on the National Spherical Torus Experiment (NSTX) to measure electron gyroscale fluctuations in NSTX plasmas. The system measures fluctuations with k⊥ ρ e 0.6 and k⊥ 20 cm-1. Up to five distinct wavenumbers are measured simultaneously, and the large toroidal curvature of NSTX plasmas provides enhanced spatial localization. Steerable optics can position the scattering volume throughout the plasma from the magnetic axis to the outboard edge. Initial measurements indicate rich turbulent dynamics on the electron gyroscale. The system will be a valuable tool for investigating the connection between electron temperature gradient turbulence and electron thermal transport in NSTX plasmas.

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JF - Review of Scientific Instruments

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A collective scattering system for measuring electron gyroscale fluctuations on the National Spherical Torus Experiment

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