111 citations · 382 across the 15 of their papers we have counts for
15 papers
Blob interaction in 2D scrape off layer simulations
Gregor Decristoforo, Fulvio Militello, Odd Erik Garcia +4
Interaction of coherent structures known as blobs in the scrape-off layer of magnetic confinement fusion devices is investigated. Isolated and interacting seeded blobs as well as f…
Intermittent electron density and temperature fluctuations and associated fluxes in the Alcator C-Mod scrape-off layer
Ralph Kube, Odd Erik Garcia, Audun Theodorsen +4
The Alcator C-Mod mirror Langmuir probe system has been used to sample data time series of fluctuating plasma parameters in the outboard mid-plane far scrape-off layer. We present…
Universality of Poisson-driven plasma fluctuations in the Alcator C-Mod scrape-off layer
A. Theodorsen, O. E. Garcia, R. Kube +2
Large-amplitude, intermittent fluctuations are ubiquitous in the boundary region of magnetically confined plasmas and lead to detrimental plasma-wall interactions in the next-gener…
Intermittent fluctuations due to uncorrelated Lorentzian pulses
O. E. Garcia, A. Theodorsen
Fluctuations due to a super-position of uncorrelated Lorentzian pulses with a random distribution of amplitudes and duration times are considered. These are demonstrated to be stro…
Intermittent fluctuations in the Alcator C-Mod scrape-off layer for ohmic and high confinement mode plasmas
O. E. Garcia, R. Kube, A. Theodorsen +2
Plasma fluctuations in the scrape-off layer of the Alcator C-Mod tokamak in ohmic and high confinement modes have been analyzed using gas puff imaging data. In all cases investigat…
Skewed Lorentzian pulses and exponential frequency power spectra
O. E. Garcia, A. Theodorsen
Frequency power spectra due to a super-position of uncorrelated Lorentzian pulses with a random distribution of amplitudes are considered. For pulses with constant duration, there…
Level crossings and excess times due to a super-position of uncorrelated exponential pulses
Audun Theodorsen, Odd Erik Garcia
A well-known stochastic model for intermittent fluctuations in physical systems is investigated. The model is given by a super-position of uncorrelated exponential pulses, and the…
Relationship between frequency power spectra and intermittent, large-amplitude bursts in the Alcator C-Mod scrape-off layer
A. Theodorsen, O. E. Garcia, R. Kube +2
Fluctuations in the boundary region of the Alcator C-Mod tokamak have been analyzed using gas puff imaging data from a set of Ohmically heated plasma density scan experiments. It i…
Power law spectra and intermittent fluctuations due to uncorrelated Lorentzian pulses
O. E. Garcia, A. Theodorsen
A stochastic model for intermittent fluctuations due to a super-position of uncorrelated Lorentzian pulses is presented. For constant pulse duration, this is shown to result in an…
Statistical properties of a filtered Poisson process with additive random noise: Distributions, correlations and moment estimation
Audun Theodorsen, Odd Erik Garcia, Martin Rypdal
Filtered Poisson processes are often used as reference models for intermittent fluc- tuations in physical systems. Such a process is here extended by adding a noise term, either as…
Amplitude and size scaling for interchange motions of plasma filaments
R. Kube, M. Wiesenberger, O. E. Garcia
The interchange dynamics and velocity scaling of blob-like plasma filaments are investigated using a two-field reduced fluid model. For incompressible flows due to buoyancy the max…
Level crossings, excess times and transient plasma-wall interactions in fusion plasmas
Audun Theodorsen, Odd Erik Garcia
Based on a stochastic model for intermittent fluctuations in the boundary region of magnetically confined plasmas, an expression for the level crossing rate is derived from the joi…
Scrape-off layer turbulence in TCV: evidence in support of stochastic modelling
A. Theodorsen, O. E. Garcia, J. Horacek +2
Intermittent fluctuations in the TCV scrape-off layer have been investigated by analysing long Langmuir probe data time series under stationary conditions, allowing calculation of…
Fluctuation statistics in the scrape-off layer of Alcator C-Mod
Ralph Kube, Odd Erik Garcia, Audun Theodorsen +2
We study long time series of the ion saturation current and floating potential, sampled by Langmuir probes dwelled in the outboard mid-plane scrape off layer and embedded in the lo…
Stochastic modelling of intermittent scrape-off layer plasma fluctuations
O. E. Garcia
Single-point measurements of fluctuations in the scrape-off layer of magnetized plasmas are generally found to be dominated by large-amplitude bursts which are associated with radi…