scholarly journals The evolution of the U-shaped double layer at the auroral cavity-ionosphere boundary in Earth's upward current region

2013 ◽  
Vol 118 (12) ◽  
pp. 7557-7565 ◽  
Author(s):  
D. S. Main
Keyword(s):  
Double Layer ◽  
Current Region ◽  
Upward Current

Conditions for establishing quasistable double layers in the Earth’s auroral upward current region

2010 ◽  
Vol 17 (12) ◽  
pp. 122901 ◽  
Author(s):  
D. S. Main ◽  
D. L. Newman ◽  
R. E. Ergun
Keyword(s):  
Double Layers ◽  
Current Region ◽  
Upward Current

Parallel electric fields in the upward current region of the aurora: Numerical solutions

2002 ◽  
Vol 9 (9) ◽  
pp. 3695-3704 ◽  
Author(s):  
R. E. Ergun ◽  
L. Andersson ◽  
D. Main ◽  
Y.-J. Su ◽  
D. L. Newman ◽  
...  
Keyword(s):  
Electric Fields ◽  
Numerical Solutions ◽  
Current Region ◽  
Upward Current

Ion acoustic solitons in Earth’s upward current region

2012 ◽  
Vol 19 (7) ◽  
pp. 072905 ◽  
Author(s):  
D. S. Main ◽  
D. L. Newman ◽  
C. Scholz ◽  
R. E. Ergun
Keyword(s):  
Ion Acoustic ◽  
Ion Acoustic Solitons ◽  
Current Region ◽  
Upward Current

scholarly journals Electron-cylotron maser radiation from electron holes: downward current region

2012 ◽  
Vol 30 (1) ◽  
pp. 119-130 ◽  
Author(s):  
R. A. Treumann ◽  
W. Baumjohann ◽  
R. Pottelette
Keyword(s):  
Fine Structure ◽  
Growth Rates ◽  
Upward Motion ◽  
Cyclotron Maser ◽  
Auroral Kilometric Radiation ◽  
Maser Radiation ◽  
Current Region ◽  
Electron Holes ◽  
Standing Problem ◽  
Upward Current

Abstract. The electron-cyclotron maser emission theory from electron holes is applied to holes generated in the downward current region of the aurora. It is argued that the main background auroral kilometric radiation source may still be located in the upward current region electron-ring (horseshoe) distribution while the fine structure is caused by electron holes predominantly in the downward current region. There the existence of electron holes is well established and electron densities are high enough for substantial maser growth rates. Trapping of radiation by the holes provides strong amplification. Upward motion of holes favours the escape of radiation both, from the holes and from the downward current region, into the upward current region. Since upward and downward current regions always exist simultaneously, they are acting in tandem in generating auroral kilometric radiation and its fine structure by the same mechanism though in different ways. This mechanism solves the long-standing problem of auroral kilometric radiation fine structure.

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