Statistical characterization of turbulence intermittency in SOL-like regimes in the Helimak

dc.contributor.advisorGentle, Kenneth W.
dc.contributor.committeeMemberBreizman, Boris
dc.contributor.committeeMemberWaelbroeck, Francois
dc.contributor.committeeMemberHazeltine, Richard
dc.contributor.committeeMemberRaja, Laxaminarayan
dc.creatorTaylor, Edward I.
dc.date.accessioned2020-08-17T16:04:39Z
dc.date.available2020-08-17T16:04:39Z
dc.date.created2019-12
dc.date.issued2019-12
dc.date.submittedDecember 2019
dc.date.updated2020-08-17T16:04:40Z
dc.description.abstractPlasma turbulence intermittency is investigated in the Texas Helimak, a simple magnetic torus which is a physical approximation to the sheared cylindrical slab. The statistical properties of the intermittency are examined through a conditional analysis of probe signal bursts and the existence of so called "blobs", coherent plasma objects which transport large amounts of particles and heat, is explored. It is shown that the conditional analysis most likely extracts artifacts due to the finite ensemble size and that no coherent part of the bursts is detected throughout the Helimak radii for all the externally applied biases. The probe signal bursts rarely follow Poisson statistics, and a match with a recently developed stochastic model based upon this is more than likely due to the large number of parameters.
dc.description.departmentPhysics
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/2152/82550
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/9554
dc.language.isoen
dc.subjectTurbulence
dc.subjectIntermittency
dc.subjectNuclear fusion
dc.subjectTokamaks
dc.subjectScrape-off layer
dc.subjectBlobs
dc.subjectFilaments
dc.subjectPlasma
dc.titleStatistical characterization of turbulence intermittency in SOL-like regimes in the Helimak
dc.typeThesis
dc.type.materialtext
thesis.degree.departmentPhysics
thesis.degree.disciplinePhysics
thesis.degree.grantorThe University of Texas at Austin
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy

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