scholarly journals How Earth’s Outer Radiation Belts Lose Their Electrons

Eos ◽  
2017 ◽  
Author(s):  
Emily Underwood
Keyword(s):  
Radiation Belts ◽  
Particle Loss ◽  
Van Allen Belts ◽  
Three Space

A new analysis of three space storms reveals the mechanisms of particle loss from the Van Allen belts.

The influence of various frequency chorus waves on electron dynamics in radiation belts

2020 ◽  
Vol 64 (4) ◽  
pp. 890-897
Author(s):  
JiaBei He ◽  
YuYue Jin ◽  
FuLiang Xiao ◽  
ZhaoGuo He ◽  
Chang Yang ◽  
...  
Keyword(s):  
Radiation Belts ◽  
Electron Dynamics ◽  
Chorus Waves

scholarly journals Colourful Poincaré symmetry, gravity and particle actions

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Joaquim Gomis ◽  
Euihun Joung ◽  
Axel Kleinschmidt ◽  
Karapet Mkrtchyan
Keyword(s):  
Field Theory ◽  
Free Particle ◽  
Three Dimensional ◽  
Background Field ◽  
Quantum Field ◽  
Symmetry Factor ◽  
Starting Point ◽  
Poincaré Algebra ◽  
Poincaré Symmetry ◽  
Three Space

Abstract We construct a generalisation of the three-dimensional Poincaré algebra that also includes a colour symmetry factor. This algebra can be used to define coloured Poincaré gravity in three space-time dimensions as well as to study generalisations of massive and massless free particle models. We present various such generalised particle models that differ in which orbits of the coloured Poincaré symmetry are described. Our approach can be seen as a stepping stone towards the description of particles interacting with a non-abelian background field or as a starting point for a worldline formulation of an associated quantum field theory.

scholarly journals Three-dimensional Maxwellian extended Newtonian gravity and flat limit

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Patrick Concha ◽  
Lucrezia Ravera ◽  
Evelyn Rodríguez ◽  
Gustavo Rubio
Keyword(s):  
Cosmological Constant ◽  
Three Dimensional ◽  
Expansion Method ◽  
Gravity Models ◽  
Newtonian Gravity ◽  
Newtonian Theory ◽  
Relativistic Limit ◽  
Expansion Procedure ◽  
Three Space ◽  
Chern Simons

Abstract In the present work we find novel Newtonian gravity models in three space-time dimensions. We first present a Maxwellian version of the extended Newtonian gravity, which is obtained as the non-relativistic limit of a particular U(1)-enlargement of an enhanced Maxwell Chern-Simons gravity. We show that the extended Newtonian gravity appears as a particular sub-case. Then, the introduction of a cosmological constant to the Maxwellian extended Newtonian theory is also explored. To this purpose, we consider the non-relativistic limit of an enlarged symmetry. An alternative method to obtain our results is presented by applying the semigroup expansion method to the enhanced Nappi-Witten algebra. The advantages of considering the Lie algebra expansion procedure is also discussed.

scholarly journals On the Number of Tetrahedra with Minimum, Unit, and Distinct Volumes in Three-Space

2008 ◽  
Vol 17 (2) ◽  
pp. 203-224 ◽  
Author(s):  
ADRIAN DUMITRESCU ◽  
CSABA D. TÓTH
Keyword(s):  
Unit Volume ◽  
Time Algorithm ◽  
Combinatorial Problems ◽  
List Type ◽  
Type Number ◽  
Point Sets ◽  
Minimum Number ◽  
Three Space

We formulate and give partial answers to several combinatorial problems on volumes of simplices determined bynpoints in 3-space, and in general inddimensions.(i)The number of tetrahedra of minimum (non-zero) volume spanned bynpoints in$\mathbb{R}$3is at most$\frac{2}{3}n^3-O(n^2)$, and there are point sets for which this number is$\frac{3}{16}n^3-O(n^2)$. We also present anO(n3) time algorithm for reporting all tetrahedra of minimum non-zero volume, and thereby extend an algorithm of Edelsbrunner, O'Rourke and Seidel. In general, for every$k,d\in \mathbb{N}, 1\leq k \leq d$, the maximum number ofk-dimensional simplices of minimum (non-zero) volume spanned bynpoints in$\mathbb{R}$dis Θ(nk).(ii)The number of unit volume tetrahedra determined bynpoints in$\mathbb{R}$3isO(n7/2), and there are point sets for which this number is Ω(n3log logn).(iii)For every$d\in \mathbb{N}$, the minimum number of distinct volumes of all full-dimensional simplices determined bynpoints in$\mathbb{R}$d, not all on a hyperplane, is Θ(n).

scholarly journals Three-dimensional stochastic modeling of radiation belts in adiabatic invariant coordinates

2014 ◽  
Vol 119 (9) ◽  
pp. 7615-7635 ◽  
Author(s):  
Liheng Zheng ◽  
Anthony A. Chan ◽  
Jay M. Albert ◽  
Scot R. Elkington ◽  
Josef Koller ◽  
...  
Keyword(s):  
Stochastic Modeling ◽  
Three Dimensional ◽  
Radiation Belts ◽  
Adiabatic Invariant

Analysis of neutral active particle loss in afterglow in krypton at 2.6mbar pressure

2008 ◽  
Vol 15 (1) ◽  
pp. 013502 ◽  
Author(s):  
Momcilo M. Pejovic ◽  
Jugoslav P. Karamarkovic ◽  
Goran S. Ristic ◽  
Milic M. Pejovic
Keyword(s):  
Active Particle ◽  
Particle Loss

Class of scalar-field soliton solutions in three space dimensions

1976 ◽  
Vol 13 (10) ◽  
pp. 2739-2761 ◽  
Author(s):  
R. Friedberg ◽  
T. D. Lee ◽  
A. Sirlin
Keyword(s):  
Scalar Field ◽  
Soliton Solutions ◽  
Three Space
Sign in / Sign up

Export Citation Format

Share Document