Study about Formation Mechanism of Red Spark Discharge of Micro-Arc Oxidation

2013 ◽  
Vol 764 ◽  
pp. 21-25
Author(s):  
Ming Qiang Pan ◽  
Yang Jun Wang ◽  
Tao Chen ◽  
Ji Zhu Liu ◽  
Li Guo Chen ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Electric Field ◽  
Formation Mechanism ◽  
Strong Electric Field ◽  
Research Problem ◽  
Spark Discharge ◽  
Formation Model ◽  
Micro Arc Oxidation ◽  
Gas Layer ◽  
Discharge Formation

Formation mechanism of the micro-arc oxidation spark discharge is always a research problem; so far there isnt a theoretical model for analyzing the spark discharge formation which is widely recognized. Based on analyzing the reaction phenomena and the coating feature in the different periods of the red spark discharge, the formation model of the red spark discharge was established. The spark discharge formation mechanism is shown that it causes the spark discharge formation that the electron bombards the gas layer wrapping the coating in the infancy of red spark discharge stage; at the later period the area of strong electric field generates the spark discharge where the coating of excessive polarization turns out easily.

Spark discharge formation in an inhomogeneous electric field under conditions of runaway electron generation

2012 ◽  
Vol 111 (2) ◽  
pp. 023304 ◽  
Author(s):  
Victor F. Tarasenko ◽  
Mikhail I. Lomaev ◽  
Dmitrii A. Sorokin ◽  
Andrei V. Kozyrev ◽  
Evgeni Kh. Baksht
Keyword(s):  
Electric Field ◽  
Runaway Electron ◽  
Spark Discharge ◽  
Inhomogeneous Electric Field ◽  
Electron Generation ◽  
Discharge Formation

scholarly journals Axion assisted Schwinger effect

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Valerie Domcke ◽  
Yohei Ema ◽  
Kyohei Mukaida
Keyword(s):  
Electric Field ◽  
Production Rate ◽  
Strong Electric Field ◽  
Background Field ◽  
Chiral Anomaly ◽  
Fermion Mass ◽  
Anomaly Equation ◽  
Electric And Magnetic Fields ◽  
Schwinger Effect ◽  
Momentum Transverse

Abstract We point out an enhancement of the pair production rate of charged fermions in a strong electric field in the presence of time dependent classical axion-like background field, which we call axion assisted Schwinger effect. While the standard Schwinger production rate is proportional to $$ \exp \left(-\pi \left({m}^2+{p}_T^2\right)/E\right) $$ exp − π m 2 + p T 2 / E , with m and pT denoting the fermion mass and its momentum transverse to the electric field E, the axion assisted Schwinger effect can be enhanced at large momenta to exp(−πm2/E). The origin of this enhancement is a coupling between the fermion spin and its momentum, induced by the axion velocity. As a non-trivial validation of our result, we show its invariance under field redefinitions associated with a chiral rotation and successfully reproduce the chiral anomaly equation in the presence of helical electric and magnetic fields. We comment on implications of this result for axion cosmology, focussing on axion inflation and axion dark matter detection.

Observation of the Avalanche of Runaway Electrons in Air in a Strong Electric Field

2012 ◽  
Vol 109 (8) ◽  
Author(s):  
A. V. Gurevich ◽  
G. A. Mesyats ◽  
K. P. Zybin ◽  
M. I. Yalandin ◽  
A. G. Reutova ◽  
...  
Keyword(s):  
Electric Field ◽  
Strong Electric Field ◽  
Runaway Electrons

Electric-Field Induced Formation of Superconducting Granular Balls

2002 ◽  
Vol 16 (17n18) ◽  
pp. 2529-2535
Author(s):  
R. Tao ◽  
X. Xu ◽  
Y. C. Lan
Keyword(s):  
Surface Energy ◽  
Electric Field ◽  
Liquid Nitrogen ◽  
Applied Electric Field ◽  
Strong Electric Field ◽  
Particle Surface ◽  
Cooper Pairs ◽  
Surface Charges

When a strong electric field is applied to a suspension of micron-sized high T c superconducting particles in liquid nitrogen, the particles quickly aggregate together to form millimeter-size balls. The balls are sturdy, surviving constant heavy collisions with the electrodes, while they hold over 106 particles each. The phenomenon is a result of interaction between Cooper pairs and the strong electric field. The strong electric field induces surface charges on the particle surface. When the applied electric field is strong enough, Cooper pairs near the surface are depleted, leading to a positive surface energy. The minimization of this surface energy leads to the aggregation of particles to form balls.

Sign in / Sign up

Export Citation Format

Share Document