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Showing 1 to 12 of 12 for “"larmor radius"”.
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Radial Electric Fields from Larmor Radius Effects in the Field-Reversed Theta Pinch
Made available in DSpace on 2017-07-06T18:48:37Z (GMT). No. of bitstreams: 3 Hu_Yuan_MS.pdf: 22313721 bytes, checksum: baf5783a195404ec322630d9dd3daae0 (MD5) Hu_Yuan_MS_ABS.pdf: 483756 bytes, checksum: bd4f2ed9f5673c6f0e126ccbee133e0a (MD5) license.txt: 4813 bytes, checksum: …
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Local transport analysis for the Alcator C-Mod tokamak
… of the scaling of transport with P*, the ion Larmor radius normalized to the plasma size. The second was a comparison of the transport predictions from the IFS-PPPL model of ion temperature gradient (ITG) driven turbulence to observations on C-Mod. The P* scaling experiments on C-Mod extend …
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Development of a model for the near-exit plume of a Hall thruster
… and are justified in the limit of small electron Larmor radius. They include the Hall transport, which is usually ignored in 2D approaches due to symmetry. The transport along magnetic field lines is high enough to convert the 3D problem into a 2D problem, where only the directions perpendicular …
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A study on the ion temperature gradient driven turbulence in tokamak plasmas
… with $\rho_*$ the normalized Larmor radius $\rho_*=\rho/R$ where $\rho$ is the ion Larmor radius and $R$ is the tokamak size). This transition is ascribed to non-local phenomena. Non-local refers to situations in which the fluxes do not depend just on the local gradients. In …
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Turbulent Dynamics Under Two Ideal Invariants: Dynamic Phase Alignment in Plasmas and Nonionized Fluids
… finite electron skin depth and finite ion Larmor radius effects as well as Landau damping. We explore the effects of Landau damping and of the generation of plasmoids on the system dynamics.
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Turbulence and transport phenomena in edge and scrape-off-layer plasmas
… critical wavenumber is normalized to ps, the ion Larmor radius at the sound speed, also known as the drift scale. The characteristic size scale shows very little variation with operating parameters. The analysis of the physical scale includes spectral analysis, yielding robust spectral indices …
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Collisionless ion collection by a sphere in a weakly magnetized plasma
… collection by a spherical probe (The mean ion Larmor radius rL > rp) in a collisionless plasma (The ion mean free path Am,fp > rp). When the sphere is at space potential, we demonstrate that the ion current dependence on the background magnetic field B is linear for low B, and provide …
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Mode conversion current drive experiments on Alcator C-Mod
… relevant to tokamak equilibria and in the finite Larmor radius limit, we find that mode conversion to Ion Cyclotron Waves is ubiquitous to high temperature conventional tokamaks, as a result of the central value for the safety factor qo 1. MCICWs are identified as kinetically modified Ion …
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Instabilities and transport in magnetized plasmas
… (∼ ion cyclotron period) and small-scale (ion Larmor radius ρi) and so fluid theory is inapplicable. We determine its nonlinear evolution in an ab initio kinetic calculation (for parallel gradients only). We use a particular physical asymptotic ordering to derive a closed nonlinear equation for …
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Laboratory Astrophysics Studies of Magnetized Collisionless Shock Precursors and the ³He³He Proton Spectrum at the OMEGA Laser Facility
… show a break in the spectrum between the ion Larmor radius and the ion skin depth for high plasma β, a sign of kinetic turbulence. Large scale particle-in-cell simulations of high β turbulence also have this feature showing that the experimental data are consistent with high β kinetic …
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Experimental Studies of Magnetic Field Generation and Saturation Mechanisms in Laser-Driven Plasmas
… |𝐵𝑘|² ∝ 𝑘⁻¹⁶ᐟ³, at scales below the electron Larmor radius. Third, experiments pushing towards the resistive dissipation regime of magnetic field saturation are presented and previewed with FLASH MHD simulations. Connections of self-generated magnetic fields to inertial confinement fusion are …
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Analysis of magnetohydrodynamic (MHD) activity using electron cyclotron emission (ECE) diagnostics on Alcator C-Mod tokamak
… added, the ideally unstable mode was finite ion Larmor radius (FLR) stabilized. However, considering that 1) electrons are collisional, 2) ions are collisionless, and 3) the thermal ion transit frequency is comparable to the ion diamagnetic drift frequency, ion Landau damping was found to be …