scholarly journals Ultracold plasma expansion as a function of charge neutrality

2014 ◽  
Vol 21 (10) ◽  
pp. 103513 ◽  
Author(s):  
Craig Witte ◽  
Jacob L. Roberts
Keyword(s):  
Plasma Expansion ◽  
Charge Neutrality ◽  
Ultracold Plasma

scholarly journals Influence of electron evaporative cooling on ultracold plasma expansion

2013 ◽  
Vol 20 (7) ◽  
pp. 073503 ◽  
Author(s):  
Truman Wilson ◽  
Wei-Ting Chen ◽  
Jacob Roberts
Keyword(s):  
Evaporative Cooling ◽  
Plasma Expansion ◽  
Ultracold Plasma

scholarly journals Using Charged Particle Imaging to Study Ultracold Plasma Expansion

2009 ◽  
Author(s):  
X. L. Zhang ◽  
R. S. Fletcher ◽  
S. L. Rolston ◽  
James R. Danielson ◽  
Thomas Sunn Pedersen
Keyword(s):  
Charged Particle ◽  
Plasma Expansion ◽  
Ultracold Plasma ◽  
Particle Imaging

scholarly journals Ultracold Plasma Expansion in a Magnetic Field

2008 ◽  
Vol 100 (23) ◽  
Author(s):  
X. L. Zhang ◽  
R. S. Fletcher ◽  
S. L. Rolston ◽  
P. N. Guzdar ◽  
M. Swisdak
Keyword(s):  
Magnetic Field ◽  
Plasma Expansion ◽  
Ultracold Plasma

scholarly journals Ion wave formation during ultracold plasma expansion

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
E. V. Vikhrov ◽  
S. Ya. Bronin ◽  
B. B. Zelener ◽  
B. V. Zelener
Keyword(s):  
Wave Formation ◽  
Plasma Expansion ◽  
Ultracold Plasma

Anisotropic ultracold plasma expansion

2020 ◽  
Vol 95 (3) ◽  
pp. 035601
Author(s):  
Rima Mebrek ◽  
Rachid Fermous ◽  
Mourad Djebli
Keyword(s):  
Plasma Expansion ◽  
Ultracold Plasma

Crystal Engineering of Bi2WO6 to Polar Aurivillius-Phase Oxyhalides

2019 ◽  
Author(s):  
Kazuki Morita ◽  
Ji-Sang Park ◽  
Sunghyun Kim ◽  
Kenji Yasuoka ◽  
Aron Walsh
Keyword(s):  
Photocatalytic Activity ◽  
Crystal Engineering ◽  
First Principles ◽  
Parent Compound ◽  
Aurivillius Phase ◽  
Aurivillius Phases ◽  
Charge Neutrality ◽  
Bismuth Oxides ◽  
Structure Surface ◽  
Electric Dipoles

The Aurivillius phases of complex bismuth oxides have attracted considerable attention due to their lattice polarization (ferroelectricity) and photocatalytic activity. We report a first-principles exploration of Bi<sub>2</sub>WO<sub>6</sub> and the replacement of W<sup>6+</sup> by pentavalent (Nb<sup>5+</sup>, Ta<sup>5+</sup>) and tetravalent (Ti<sup>4+</sup>, Sn<sup>4+</sup>) ions, with charge neutrality maintained by the formation of a mixed-anion oxyhalide sublattice. We find that Bi<sub>2</sub>SnO<sub>4</sub>F<sub>2</sub> is thermodynamically unstable, in contrast to Bi<sub>2</sub>TaO<sub>5</sub>F, Bi<sub>2</sub>NbO<sub>5</sub>F and Bi<sub>2</sub>TiO<sub>4</sub>F<sub>2</sub>. The electric dipoles introduced by chemical substitutions in the parent compound are found to suppress the spontaneous polarization from 61.55 μC/cm<sup>2</sup> to below 15.50 μC/cm<sup>2</sup>. Analysis of the trends in electronic structure, surface structure, and ionization potentials are reported. This family of materials can be further extended with control of layer thicknesses and choice of compensating halide species.<br>

scholarly journals Charge separation effects in magnetized electron–ion plasma expansion into a vacuum

2003 ◽  
Vol 10 (11) ◽  
pp. 4559-4562 ◽  
Author(s):  
Kazumi Nishimura ◽  
Edison Liang ◽  
S. Peter Gary
Keyword(s):  
Charge Separation ◽  
Plasma Expansion ◽  
Ion Plasma

scholarly journals Correlation-Induced Insulating Topological Phases at Charge Neutrality in Twisted Bilayer Graphene

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuan Da Liao ◽  
Jian Kang ◽  
Clara N. Breiø ◽  
Xiao Yan Xu ◽  
Han-Qing Wu ◽  
...  
Keyword(s):  
Bilayer Graphene ◽  
Topological Phases ◽  
Charge Neutrality ◽  
Twisted Bilayer Graphene

scholarly journals Antimatter Free-Fall Experiments and Charge Asymmetry

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1192
Author(s):  
Ulrich David Jentschura
Keyword(s):  
Field Theory ◽  
Asymmetry Parameter ◽  
Charge Asymmetry ◽  
Free Fall ◽  
Experimental Setup ◽  
Charge Neutrality ◽  
The Earth ◽  
Antimatter Gravity ◽  
Precision Test ◽  
Theoretical Side

We propose a method by which one could use modified antimatter gravity experiments in order to perform a high-precision test of antimatter charge neutrality. The proposal is based on the application of a strong, external, vertically oriented electric field during an antimatter free-fall gravity experiment in the gravitational field of the Earth. The proposed experimental setup has the potential to drastically improve the limits on the charge-asymmetry parameter ϵ¯q of antimatter. On the theoretical side, we analyze possibilities to describe a putative charge-asymmetry of matter and antimatter, proportional to the parameters ϵq and ϵ¯q, by Lagrangian methods. We found that such an asymmetry could be described by four-dimensional Lorentz-invariant operators that break CPT without destroying the locality of the field theory. The mechanism involves an interaction Lagrangian with field operators decomposed into particle or antiparticle field contributions. Our Lagrangian is otherwise Lorentz, as well as PT invariant. Constraints to be derived on the parameter ϵ¯q do not depend on the assumed theoretical model.

scholarly journals Ultrafast electron cooling in an expanding ultracold plasma

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tobias Kroker ◽  
Mario Großmann ◽  
Klaus Sengstock ◽  
Markus Drescher ◽  
Philipp Wessels-Staarmann ◽  
...  
Keyword(s):  
Theoretical Models ◽  
Einstein Condensate ◽  
Direct Access ◽  
Electron Cooling ◽  
Plasma Dynamics ◽  
Strongly Coupled ◽  
Bose Einstein Condensate ◽  
Ultracold Plasma ◽  
Strongly Coupled Plasma ◽  
Bose Einstein

AbstractPlasma dynamics critically depends on density and temperature, thus well-controlled experimental realizations are essential benchmarks for theoretical models. The formation of an ultracold plasma can be triggered by ionizing a tunable number of atoms in a micrometer-sized volume of a 87Rb Bose-Einstein condensate (BEC) by a single femtosecond laser pulse. The large density combined with the low temperature of the BEC give rise to an initially strongly coupled plasma in a so far unexplored regime bridging ultracold neutral plasma and ionized nanoclusters. Here, we report on ultrafast cooling of electrons, trapped on orbital trajectories in the long-range Coulomb potential of the dense ionic core, with a cooling rate of 400 K ps−1. Furthermore, our experimental setup grants direct access to the electron temperature that relaxes from 5250 K to below 10 K in less than 500 ns.

Sign in / Sign up

Export Citation Format

Share Document