@inproceedings{580a7dfb9d77472699bb90f5a9577ce6,
title = "Microtearing instabilities and electron transport in the NSTX spherical tokamak",
abstract = "In summary, we have shown that the observed electron thermal conductivity in one type of NSTX discharge can be explained by the magnetic fluctuations from microtearing instabilities. These modes saturate at large amplitude due to the low magnetic field; they produce global stochastic magnetic fields, and therefore Eq.(1) is applicable. This explains the good agreement between the theoretical and the observed electron thermal conductivity over the entire region where the microtearing mode is the fastest growing instability with 0.3 ≤ kθρi ≤ 1. NSTX has the flexibility to operate in many regimes. This instability could be suppressed by reversed magnetic shear, by raising the electron temperature such that νe < ω*e, or by operating at higher magnetic field to reduce the saturation amplitude. This result does not rule out ETG turbulence in controlling electron transport in NSTX. ETG modes are calculated to be important in other discharges and/or at other locations.",
author = "Wong, \{K. L.\} and S. Kaye and Mikkelsen, \{D. R.\} and Krommes, \{J. A.\} and K. Hill and R. Bell and B. LeBlanc",
year = "2007",
language = "English (US)",
isbn = "9781622763344",
series = "34th EPS Conference on Plasma Physics 2007, EPS 2007 - Europhysics Conference Abstracts",
number = "2",
pages = "881--884",
booktitle = "34th EPS Conference on Plasma Physics 2007, EPS 2007 - Europhysics Conference Abstracts",
edition = "2",
note = "34th European Physical Society Conference on Plasma Physics 2007, EPS 2007 ; Conference date: 02-07-2007 Through 06-07-2007",
}