Nonlinear shearing modes approach to the diocotron instability of a planar electron strip

2015 ◽  
Vol 22 (9) ◽  
pp. 092125 ◽  
Author(s):  
V. V. Mikhailenko ◽  
V. S. Mikhailenko ◽  
Younghyun Jo ◽  
Hae June Lee
Keyword(s):  
Diocotron Instability ◽  
Planar Electron

scholarly journals Anomalous Beam Transport through Gabor (Plasma) Lens Prototype

2021 ◽  
Vol 11 (10) ◽  
pp. 4357
Author(s):  
Toby Nonnenmacher ◽  
Titus-Stefan Dascalu ◽  
Robert Bingham ◽  
Chung Lim Cheung ◽  
Hin-Tung Lau ◽  
...  
Keyword(s):  
Cost Effective ◽  
Stable Operation ◽  
High Electron ◽  
Beam Transport ◽  
Focusing Effect ◽  
Energy Proton ◽  
Diocotron Instability ◽  
Strong Focusing ◽  
Axis Rotation ◽  
Mev Protons

An electron plasma lens is a cost-effective, compact, strong-focusing element that can ensure efficient capture of low-energy proton and ion beams from laser-driven sources. A Gabor lens prototype was built for high electron density operation at Imperial College London. The parameters of the stable operation regime of the lens and its performance during a beam test with 1.4 MeV protons are reported here. Narrow pencil beams were imaged on a scintillator screen 67 cm downstream of the lens. The lens converted the pencil beams into rings that show position-dependent shape and intensity modulation that are dependent on the settings of the lens. Characterisation of the focusing effect suggests that the plasma column exhibited an off-axis rotation similar to the m=1 diocotron instability. The association of the instability with the cause of the rings was investigated using particle tracking simulations.

scholarly journals EDGE ASYMPTOTICS OF PLANAR ELECTRON DENSITIES

1994 ◽  
Vol 08 (11n12) ◽  
pp. 1625-1638 ◽  
Author(s):  
GERALD V. DUNNE
Keyword(s):  
Asymptotic Expansion ◽  
Magnetic Flux ◽  
Landau Level ◽  
Particle Number ◽  
Landau Levels ◽  
Electron Densities ◽  
Boundary Location ◽  
Boundary Characteristics ◽  
Planar Electron

The N→∞ limit of the edges of finite planar electron densities is discussed for higher Landau levels. For full filling, the particle number is correlated with the magnetic flux, and hence with the boundary location, making the N→∞ limit more subtle at the edges than in the bulk. In the nth Landau level, the density exhibits n distinct steps at the edge, in both circular and rectangular samples. The boundary characteristics for individual Landau levels, and for successively filled Landau levels, are computed in an asymptotic expansion.

Non-modal analysis of the diocotron instability: Cylindrical geometry

2013 ◽  
Vol 20 (4) ◽  
pp. 042101 ◽  
Author(s):  
V. V. Mikhailenko ◽  
Hae June Lee ◽  
V. S. Mikhailenko ◽  
N. A. Azarenkov
Keyword(s):  
Modal Analysis ◽  
Cylindrical Geometry ◽  
Diocotron Instability

The Stepwise Cross-sectional Crystalline Analysis of the Stress Induced Voiding in Cu Interconnect

2006 ◽  
Vol 914 ◽  
Author(s):  
Hyo-Jong Lee ◽  
Heung Nam Han ◽  
Suk Hoon Kang ◽  
Jeong-Yun Sun ◽  
Kyu Hwan Oh
Keyword(s):  
Grain Boundary ◽  
Twin Boundary ◽  
Triple Junction ◽  
Hydrostatic Stress ◽  
Electron Backscattered Diffraction ◽  
Cross Sectional ◽  
Copper Interconnect ◽  
Crystallographic Study ◽  
Cu Interconnect ◽  
Planar Electron

AbstractIn a crystallographic study of stress induced voiding of copper interconnect, the planar electron backscattered diffraction analysis showed that the void was initiated at the triple junction of the grain boundaries, not at the junction of the twin boundary and grain boundary. By using stepwise cross-sectional crystalline investigation for the void, it was possible to rebuild 3D crystalline structure near the void. From the stress calculation based on the measured crystalline structures, the hydrostatic stress was highly concentrated at the triple junction of the twin boundary and grain boundary, but experimentally, there was no voiding at that. The voiding in the copper interconnect may depend mainly on the boundary instability.

scholarly journals A new fully two-dimensional conservative semi-Lagrangian method: applications on polar grids, from diocotron instability to ITG turbulence

2014 ◽  
Vol 68 (9) ◽  
Author(s):  
Nicolas Crouseilles ◽  
Pierre Glanc ◽  
Sever A. Hirstoaga ◽  
Eric Madaule ◽  
Michel Mehrenberger ◽  
...  
Keyword(s):  
Lagrangian Method ◽  
Two Dimensional ◽  
Diocotron Instability
Sign in / Sign up

Export Citation Format

Share Document