Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Characterizing time intermittency in non-diffusive fast ion transport through plasma turbulence
 
research article

Characterizing time intermittency in non-diffusive fast ion transport through plasma turbulence

Manke, F.
•
Baquero-Ruiz, M.
•
Furno, I  
Show more
January 1, 2020
Plasma Physics And Controlled Fusion

Turbulent fast ion transport has been investigated in astrophisycal, laboratory and fusion plasmas. When gyro- and drift-averaging across plasma structures manifest as non-markovian and non-local effects, this results in generally non-diffusive transport. The intermittency of the formation of these plasma structures, such as blobs, can potentially be reflected in the transport of the fast ions as well. In the TORPEX basic plasma device, a toroidal beam of suprathermal Li-6 ions is injected into electrostatic plasma turbulence. Conditional sampling techniques confirm turbulent E x B-drifts as physical driving mechanism of radial fast ion transport, which features sub-, super- or quasi-diffusive regimes depending on the fast ion energy and propagation time. To address the question of how far local intermittency is associated with each regime, we analyze characteristics of time-intermittency on an extensive set of local fast ion time-series across all observed regimes. Modeling the time-average fast ion profiles as the result of a meandering smaller instantaneous beam allows us to predict the skewness of such time-series based on their time-average. Comparisons with the skewness of simple two-valued time-series can yield relative indications towards certain transport regimes in our specific system, based on the differences in the size of the instantaneous fast ion beam.

  • Details
  • Metrics
Type
research article
DOI
10.1088/1361-6587/ab433b
Web of Science ID

WOS:000502078100004

Author(s)
Manke, F.
Baquero-Ruiz, M.
Furno, I  
Chellai, O.
Fasoli, A.  
Ricci, P.  
Date Issued

2020-01-01

Publisher

IOP PUBLISHING LTD

Published in
Plasma Physics And Controlled Fusion
Volume

62

Issue

1

Article Number

014004

Subjects

Physics, Fluids & Plasmas

•

Physics

•

plasma turbulence

•

suprathermal ions

•

non-diffusive transport

•

intermittency

•

time series analysis

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SPC  
Available on Infoscience
March 3, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/166624
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés