scholarly journals Bubble regime of plasma wakefield in 2D and 3D geometries

2018 ◽  
Vol 25 (10) ◽  
pp. 103107 ◽  
Author(s):  
A. A. Golovanov ◽  
I. Yu. Kostyukov
Keyword(s):  
Bubble Regime ◽  
2D And 3D ◽  
Plasma Wakefield

scholarly journals Temporal and spatial expansion of a multi-dimensional model for electron acceleration in the bubble regime

2014 ◽  
Vol 32 (2) ◽  
pp. 277-284 ◽  
Author(s):  
J. Thomas ◽  
A. Pukhov ◽  
I.Yu. Kostyukov
Keyword(s):  
Bubble Radius ◽  
Energetic Electron ◽  
Particle Spectrum ◽  
Dimensional Model ◽  
Full Field ◽  
Highly Nonlinear ◽  
Piecewise Model ◽  
Temporal And Spatial ◽  
Bubble Regime ◽  
Plasma Wakefield

AbstractAn extended analytical model for particle dynamics in fields of a highly-nonlinear plasma wakefield (the bubble or blow out regime) is derived. A recently proposed piecewise model is generalized to include a time dependent bubble radius and full field solution in the acceleration direction. Incorporation of the cavity dynamics in the model is required to simulate the particle trapping properly. On the other hand, it is shown that the previously reported piecewise model does not reproduce the formation of a mono energetic peak in the particle spectrum. The mono energetic electron beams are recovered only when the full longitudinal field gradient is included in the model.

scholarly journals Analytic model for electromagnetic fields in the bubble regime of plasma wakefield in non-uniform plasmas

2017 ◽  
Vol 24 (10) ◽  
pp. 103104 ◽  
Author(s):  
A. A. Golovanov ◽  
I. Yu. Kostyukov ◽  
J. Thomas ◽  
A. Pukhov
Keyword(s):  
Electromagnetic Fields ◽  
Analytic Model ◽  
Bubble Regime ◽  
Plasma Wakefield

scholarly journals Bubble structure in laser wake-field acceleration

2016 ◽  
Vol 34 (2) ◽  
pp. 193-201 ◽  
Author(s):  
Ershad Sadeghi Toosi ◽  
Saeed Mirzanejhad ◽  
Davoud Dorranian
Keyword(s):  
Laser Pulse ◽  
Plasma Parameters ◽  
Particle In Cell ◽  
Wake Field ◽  
Highly Nonlinear ◽  
High Intensity Laser ◽  
Bubble Structure ◽  
Bubble Regime ◽  
2D And 3D ◽  
Intensity Laser

AbstractHighly nonlinear ellipsoid bubble regime of the laser wake-field acceleration with high-intensity laser pulse is considered with analytical and numerical calculations. The important property of this regime is the production of the mono-energetic high-quality electron beam. We introduce a new twofold ellipsoid structure of the bubble (egg shape) by referring to some published two-dimensional (2D) and 3D simulations. In this paper, a new analytical formalism is introduced, in which dimensions of the front part of the ellipsoid bubble are related to the laser pulse and plasma parameters. These relationships are in agreement with 2D particle-in-cell code results in recent work (Benedetti et al., 2013).

scholarly journals Ion dynamics driven by a strongly nonlinear plasma wake

2021 ◽  
Author(s):  
Vadim Khudiakov ◽  
Konstantin V Lotov ◽  
Mike Downer
Keyword(s):  
Ion Dynamics ◽  
Density Peak ◽  
Density Profiles ◽  
Ion Density ◽  
Strongly Nonlinear ◽  
Plasma Wakefield Accelerators ◽  
Ion Acoustic Solitons ◽  
Physical Effects ◽  
Bubble Regime ◽  
Plasma Wakefield

Abstract In plasma wakefield accelerators, the wave excited in the plasma eventually breaks and leaves behind slowly changing fields and currents that perturb the ion density background. We study this process numerically using the example of a FACET experiment where the wave is excited by an electron bunch in the bubble regime in a radially bounded plasma. Four physical effects underlie the dynamics of ions: (1) attraction of ions toward the axis by the fields of the driver and the wave, resulting in formation of a density peak, (2) generation of ion-acoustic solitons following the decay of the density peak, (3) positive plasma charging after wave breaking, leading to acceleration of some ions in the radial direction, and (4) plasma pinching by the current generated during the wavebreaking. Interplay of these effects result in formation of various radial density profiles, which are difficult to produce in any other way.

Analysis of 2D and 3D defects associated with precipitation of Cu in silicon

1991 ◽  
Vol 49 ◽  
pp. 870-871
Author(s):  
P.M. Rice ◽  
MJ. Kim ◽  
R.W. Carpenter
Keyword(s):  
Colony Growth ◽  
Dark Field ◽  
Dark Side ◽  
Silicide Phase ◽  
Strain Fields ◽  
Near Surface ◽  
Unknown Composition ◽  
Secondary Precipitates ◽  
20 Nm ◽  
2D And 3D

Extrinsic gettering of Cu on near-surface dislocations in Si has been the topic of recent investigation. It was shown that the Cu precipitated hetergeneously on dislocations as Cu silicide along with voids, and also with a secondary planar precipitate of unknown composition. Here we report the results of investigations of the sense of the strain fields about the large (~100 nm) silicide precipitates, and further analysis of the small (~10-20 nm) planar precipitates.Numerous dark field images were analyzed in accordance with Ashby and Brown's criteria for determining the sense of the strain fields about precipitates. While the situation is complicated by the presence of dislocations and secondary precipitates, micrographs like those shown in Fig. 1(a) and 1(b) tend to show anomalously wide strain fields with the dark side on the side of negative g, indicating the strain fields about the silicide precipitates are vacancy in nature. This is in conflict with information reported on the η'' phase (the Cu silicide phase presumed to precipitate within the bulk) whose interstitial strain field is considered responsible for the interstitial Si atoms which cause the bounding dislocation to expand during star colony growth.

Covalent organic frameworks: an ideal platform for designing ordered materials and advanced applications

2021 ◽  
Author(s):  
Ruoyang Liu ◽  
Ke Tian Tan ◽  
Yifan Gong ◽  
Yongzhi Chen ◽  
Zhuoer Li ◽  
...  
Keyword(s):  
Covalent Organic Frameworks ◽  
2D And 3D ◽  
Advanced Applications

Covalent organic frameworks offer a molecular platform for integrating organic units into periodically ordered yet extended 2D and 3D polymers to create topologically well-defined polygonal lattices and built-in discrete micropores and/or mesopores.

Evaluating Alternate Visualization Methods for Microsurgery: 2D and 3D Optical Microscopes and Flat-Panel Displays

2012 ◽  
Author(s):  
Michael Sackllah ◽  
Denny Yu ◽  
Charles Woolley ◽  
Steven Kasten ◽  
Thomas J. Armstrong
Keyword(s):  
Flat Panel Displays ◽  
Flat Panel ◽  
2D And 3D
Sign in / Sign up

Export Citation Format

Share Document