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Title: Zonostrophic instability driven by discrete particle noise

Abstract

The consequences of discrete particle noise for a system possessing a possibly unstable collective mode are discussed. It is argued that a zonostrophic instability (of homogeneous turbulence to the formation of zonal flows) occurs just below the threshold for linear instability. The scenario provides a new interpretation of the random forcing that is ubiquitously invoked in stochastic models such as the second-order cumulant expansion or stochastic structural instability theory; neither intrinsic turbulence nor coupling to extrinsic turbulence is required. A representative calculation of the zonostrophic neutral curve is made for a simple two-field model of toroidal ion-temperature-gradient-driven modes. To the extent that the damping of zonal flows is controlled by the ion-ion collision rate, the point of zonostrophic instability is independent of that rate. Published by AIP Publishing.

Authors:
ORCiD logo [1]; ORCiD logo [1]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Contributing Org.:
This work was supported by a NSERC PGS-D scholarship
OSTI Identifier:
1358662
Alternate Identifier(s):
OSTI ID: 1361791
Report Number(s):
PPPL-5324
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
-AC02-09CH11466; NSERC PGS-D scholarship; AC02-09CH11466
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 4; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Turbulence simulations; Transport; Stability; Plasma Microturbulence; Convection

Citation Formats

St-Onge, D. A., and Krommes, J. A. Zonostrophic instability driven by discrete particle noise. United States: N. p., 2017. Web. doi:10.1063/1.4978786.
St-Onge, D. A., & Krommes, J. A. Zonostrophic instability driven by discrete particle noise. United States. doi:10.1063/1.4978786.
St-Onge, D. A., and Krommes, J. A. Sat . "Zonostrophic instability driven by discrete particle noise". United States. doi:10.1063/1.4978786. https://www.osti.gov/servlets/purl/1358662.
@article{osti_1358662,
title = {Zonostrophic instability driven by discrete particle noise},
author = {St-Onge, D. A. and Krommes, J. A.},
abstractNote = {The consequences of discrete particle noise for a system possessing a possibly unstable collective mode are discussed. It is argued that a zonostrophic instability (of homogeneous turbulence to the formation of zonal flows) occurs just below the threshold for linear instability. The scenario provides a new interpretation of the random forcing that is ubiquitously invoked in stochastic models such as the second-order cumulant expansion or stochastic structural instability theory; neither intrinsic turbulence nor coupling to extrinsic turbulence is required. A representative calculation of the zonostrophic neutral curve is made for a simple two-field model of toroidal ion-temperature-gradient-driven modes. To the extent that the damping of zonal flows is controlled by the ion-ion collision rate, the point of zonostrophic instability is independent of that rate. Published by AIP Publishing.},
doi = {10.1063/1.4978786},
journal = {Physics of Plasmas},
number = 4,
volume = 24,
place = {United States},
year = {Sat Apr 01 00:00:00 EDT 2017},
month = {Sat Apr 01 00:00:00 EDT 2017}
}

Journal Article:
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