scholarly journals Pair production in differently polarized electric fields with frequency chirps

2019 ◽  
Vol 99 (3) ◽  
Author(s):  
Obulkasim Olugh ◽  
Zi-Liang Li ◽  
Bai-Song Xie ◽  
Reinhard Alkofer
Keyword(s):  
Pair Production ◽  
Electric Fields

scholarly journals Pair production in rotating electric fields

2014 ◽  
Vol 89 (8) ◽  
Author(s):  
Alexander Blinne ◽  
Holger Gies
Keyword(s):  
Pair Production ◽  
Electric Fields

scholarly journals Dynamics of positrons during relativistic electron runaway

2018 ◽  
Vol 84 (5) ◽  
Author(s):  
O. Embréus ◽  
L. Hesslow ◽  
M. Hoppe ◽  
G. Papp ◽  
K. Richards ◽  
...  
Keyword(s):  
Pair Production ◽  
Electric Fields ◽  
Numerical Solutions ◽  
Production Cross ◽  
Analytical Formula ◽  
Rate Equations ◽  
Annihilation Radiation ◽  
Operational Parameters ◽  
Pair Production Cross Section ◽  
Strong Electric Fields

Sufficiently strong electric fields in plasmas can accelerate charged particles to relativistic energies. In this paper we describe the dynamics of positrons accelerated in such electric fields, and calculate the fraction of created positrons that become runaway accelerated, along with the amount of radiation that they emit. We derive an analytical formula that shows the relative importance of the different positron production processes, and show that, above a certain threshold electric field, the pair production by photons is lower than that by collisions. We furthermore present analytical and numerical solutions to the positron kinetic equation; these are applied to calculate the fraction of positrons that become accelerated or thermalized, which enters into rate equations that describe the evolution of the density of the slow and fast positron populations. Finally, to indicate operational parameters required for positron detection during runaway in tokamak discharges, we give expressions for the parameter dependencies of detected annihilation radiation compared to bremsstrahlung detected at an angle perpendicular to the direction of runaway acceleration. Using the full leading-order pair-production cross-section, we demonstrate that previous related work has overestimated the collisional pair production by at least a factor of four.

Pair production in time-dependent electric fields

1992 ◽  
Vol 13 (4) ◽  
pp. 241-250 ◽  
Author(s):  
S. A. Baran ◽  
I. H. Duru
Keyword(s):  
Pair Production ◽  
Electric Fields ◽  
Time Dependent

scholarly journals Schwinger pair production in inhomogeneous electric fields with symmetrical frequency chirp

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
Melike Mohamedsedik ◽  
Lie-Juan Li ◽  
B. S. Xie
Keyword(s):  
Pair Production ◽  
Electric Fields ◽  
Frequency Chirp

scholarly journals Boson pair production in arbitrarily polarized electric fields

2019 ◽  
Vol 100 (7) ◽  
Author(s):  
Z. L. Li ◽  
B. S. Xie ◽  
Y. J. Li
Keyword(s):  
Pair Production ◽  
Electric Fields ◽  
Boson Pair ◽  
Boson Pair Production

scholarly journals PAIR PRODUCTION DENSITY IN STRONG QED

2011 ◽  
Vol 01 ◽  
pp. 303-310 ◽  
Author(s):  
SANG PYO KIM ◽  
HYUN KYU LEE ◽  
YONGSUNG YOON
Keyword(s):  
Magnetic Fields ◽  
Pair Production ◽  
Electric Fields ◽  
Current Status ◽  
Strong Magnetic Fields ◽  
Strong Electric Fields

The current status of the research on pair production in strong QED is briefly reviewed not only for strong electric fields but also for strong magnetic fields in magnetically dominated astrophysical environment. A particular attention is paid to the spectral production number in the in- and out-state formalism and a possible prescription of the momentum integration is proposed to obtain the production density.

scholarly journals A holographic description of the Schwinger effect in a confining gauge theory

2015 ◽  
Vol 30 (11) ◽  
pp. 1530026 ◽  
Author(s):  
Daisuke Kawai ◽  
Yoshiki Sato ◽  
Kentaroh Yoshida
Keyword(s):  
Pair Production ◽  
Production Rate ◽  
Electric Fields ◽  
String Tension ◽  
Critical Value ◽  
Remarkable Feature ◽  
Coulomb Phase ◽  
Holographic Approach ◽  
Schwinger Effect ◽  
Holographic Description

This is a review of the recent progress on a holographic description of the Schwinger effect. In 2011, Semenoff and Zarembo proposed a scenario to study the Schwinger effect in the context of the AdS/CFT correspondence. The production rate of quark–antiquark pairs was computed in the Coulomb phase. In particular, it provided the critical value of external electric field, above which particles are freely created and the vacuum decays catastrophically. Then the potential analysis in the holographic approach was invented and it enabled us to study the Schwinger effect in the confining phase as well. A remarkable feature of the Schwinger effect in the confining phase is to exhibit another kind of the critical value, below which the pair production cannot occur and the vacuum of the system is nonperturbatively stable. The critical value is tantamount to the confining string tension. We computed the pair production rate numerically and introduced new exponents associated with the critical electric fields.

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