MEASUREMENT OF ELECTRIC FIELD IN TURBULENT PLASMA BY THE METHOD OF SATELLITES OF FORBIDDEN TRANSITIONS IN HELIUM

1979 ◽  
Vol 40 (C7) ◽  
pp. C7-867-C7-868
Author(s):  
M. P. Brizhinev ◽  
S. V. Egorov ◽  
B. G. Eremin ◽  
A. V. Kostrov ◽  
A. D. Stepanushkin
Keyword(s):  
Electric Field ◽  
Turbulent Plasma ◽  
Forbidden Transitions

scholarly journals Influence of Built-in Electric Field on Forbidden Transitions in InxGa1-xAs/GaAs Double Quantum Well by Three-Beam Photoreflectance

2001 ◽  
Vol 100 (3) ◽  
pp. 417-424 ◽  
Author(s):  
G. Sęk ◽  
K. Ryczko ◽  
J. Misiewicz ◽  
M. Bayer ◽  
T. Wang ◽  
...  
Keyword(s):  
Electric Field ◽  
Quantum Well ◽  
Double Quantum ◽  
Double Quantum Well ◽  
Forbidden Transitions

scholarly journals Selection rule engineering of forbidden transitions of a hydrogen atom near a nanogap

Nanophotonics ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 229-236 ◽  
Author(s):  
Hyunyoung Y. Kim ◽  
Daisik S. Kim
Keyword(s):  
Hydrogen Atom ◽  
Electric Field ◽  
Selection Rule ◽  
Field Vector ◽  
Rapid Variation ◽  
One Dimensional ◽  
Near Zone ◽  
Forbidden Transitions ◽  
The One ◽  
Dipole Sources

AbstractWe perform an analytical study on the allowance of forbidden transitions for a hydrogen atom placed near line dipole sources, mimicking light emanating from a one-dimensional metallic nanogap. It is shown that the rapid variation of the electric field vector, inevitable in the near zone, completely breaks the selection rule of Δl=±1. While the forbidden transitions between spherically symmetric S states, such as 2S to 1S or 3S to 1S (Δl=0), are rather robust against selection rule breakage, Δl=±2 transitions such as between 3D and 1S or 3D and 2S states are very vulnerable to the spatial variation of the perturbing electric field. Transitions between 2S and 3D states are enhanced by many orders of magnitude, aided by the quadratic nature of both the perturbing Hamiltonian and D wavefunctions. The forbidden dipole moment, which approaches one Bohr radius times the electric charge in the vicinity of the gap, can be written in a simple closed form owing to the one-dimensional nature of our gap. With large enough effective volume together with the symmetric nature of the excited state wavefunctions, our work paves way towards atomic physics application of infinitely long nanogaps.

Energy-Density Spectrum of the Electric Field in a Turbulent Plasma

1972 ◽  
Vol 5 (4) ◽  
pp. 1813-1819 ◽  
Author(s):  
S. H. Kim ◽  
H. E. Wilhelm
Keyword(s):  
Energy Density ◽  
Electric Field ◽  
Turbulent Plasma ◽  
Density Spectrum

Comments on the paper ‘Self-similar state of a weakly turbulent plasma’

1982 ◽  
Vol 27 (1) ◽  
pp. 189-190 ◽  
Author(s):  
G. E. Vekstein ◽  
D. D. Ryutov ◽  
R. Z. Sagdeev
Keyword(s):  
Electric Field ◽  
External Electric Field ◽  
Collisionless Plasma ◽  
Turbulent Plasma ◽  
The Self ◽  
Similar Solution ◽  
One Dimensional ◽  
Self Similar Solution ◽  
Self Similar ◽  
The One

In a recent paper, Balescu (1980) criticizes the self-similar solution in the problem of anomalous plasma resistivity (Vekstein, Ryutov & Sagdeev 1970) and comes to the conclusion that this solution is not correct. The aim of this comment is to show why Balescu's arguments are erroneous.We consider here the simplest case of the one-dimensional collisionless plasma in the presence of an external electric field.

Anomalous resistivity of a turbulent plasma in a strong electric field

1979 ◽  
Vol 21 (3) ◽  
pp. 475-500 ◽  
Author(s):  
Y. Kiwamoto ◽  
H. Kuwahaara ◽  
H. Tanaca
Keyword(s):  
Electric Field ◽  
Collision Frequency ◽  
Strong Electric Field ◽  
Turbulent Plasma ◽  
Electron Drift ◽  
Anomalous Resistivity ◽  
Effective Collision Frequency ◽  
Ion Acoustic ◽  
Average Electron ◽  
Effective Collision

The enhanced effective collision frequency in a turbulent plasma produced by a strong electric field is studied using a small toroidal device. The collision frequency is presented as a function of the electric field E and the average electron drift velocity. Two collision frequency regimes are identified. In the regime I where v ∝ E½, the current driven ion-acoustic turbulence is considered responsible.

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