Impulsive Ion Injection into the Polar Cusp

1976 ◽  
pp. 47-53 ◽  
Author(s):  
R. B. Torbert ◽  
C. W. Carlson
Keyword(s):  
Polar Cusp ◽  
Ion Injection

Ion Injection and Acceleration in the Polar Cusp

1985 ◽  
pp. 67-84 ◽  
Author(s):  
W. K. Peterson
Keyword(s):  
Polar Cusp ◽  
Ion Injection

Liquid metal ion source assembly for external ion injection into an electron string ion source (ESIS)

2016 ◽  
Vol 87 (2) ◽  
pp. 02A913
Author(s):  
M. J. Segal ◽  
R. A. Bark ◽  
R. Thomae ◽  
E. E. Donets ◽  
E. D. Donets ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Metal Ion ◽  
Ion Source ◽  
Ion Injection

Development of ion injection into the BNL test electron beam ion source using a prototype low energy beam transfer switchyard and a hollow cathode ion source (abstract)

2008 ◽  
Vol 79 (2) ◽  
pp. 02B318
Author(s):  
E. N. Beebe ◽  
J. G. Alessi ◽  
A. Kponou ◽  
C. Meitzler ◽  
A. Pikin ◽  
...  
Keyword(s):  
Electron Beam ◽  
Hollow Cathode ◽  
Ion Source ◽  
Low Energy ◽  
Energy Beam ◽  
Ion Injection ◽  
Test Electron

scholarly journals Injection Porch Parameters for Heavy Ion Injection?

1985 ◽  
Author(s):  
Ashby H. ◽  
J. Curto ◽  
A. Feltman
Keyword(s):  
Heavy Ion ◽  
Ion Injection

scholarly journals A multi-satellite study of accelerated ionospheric ion beams above the polar cap

2006 ◽  
Vol 24 (6) ◽  
pp. 1665-1684 ◽  
Author(s):  
R. Maggiolo ◽  
J. A. Sauvaud ◽  
D. Fontaine ◽  
A. Teste ◽  
E. Grigorenko ◽  
...  
Keyword(s):  
Electric Field ◽  
Potential Drop ◽  
Auroral Zone ◽  
Ion Beams ◽  
Distribution Functions ◽  
Convection Velocity ◽  
Polar Cap ◽  
Ion Energy ◽  
Polar Cusp ◽  
Oxygen Ions

Abstract. This paper presents a study of nearly field-aligned outflowing ion beams observed on the Cluster satellites over the polar cap. Data are taken at geocentric radial distances of the order of 5–9 RE. The distinction is made between ion beams originating from the polar cusp/cleft and beams accelerated almost along the magnetic field line passing by the spacecraft. Polar cusp beams are characterized by nearly field-aligned proton and oxygen ions with an energy ratio EO+ / EH+, of the order of 3 to 4, due to the ion energy repartition inside the source and to the latitudinal extension of the source. Rapid variations in the outflowing ion energy are linked with pulses/modifications of the convection electric field. Cluster data allow one to show that these perturbations of the convection velocity and the associated ion structures propagate at the convection velocity. In contrast, polar cap local ion beams are characterized by field-aligned proton and oxygen ions with similar energies. These beams show the typical inverted V structures usually observed in the auroral zone and are associated with a quasi-static converging electric field indicative of a field-aligned electric field. The field-aligned potential drop fits well the ion energy profile. The simultaneous observation of precipitating electrons and upflowing ions of similar energies at the Cluster orbit indicates that the spacecraft are crossing the mid-altitude part of the acceleration region. In the polar cap, the parallel electric field can thus extend to altitudes higher than 5 Earth radii. A detailed analysis of the distribution functions shows that the ions are heated during their parallel acceleration and that energy is exchanged between H+ and O+. Furthermore, intense electrostatic waves are observed simultaneously. These observations could be due to an ion-ion two-stream instability.

Electrodynamics of the polar cusp ionosphere; A case study

1989 ◽  
Vol 94 (A6) ◽  
pp. 6713-6722 ◽  
Author(s):  
P. E. Sandholt ◽  
B. Jacobsen ◽  
B. Lybekk ◽  
A. Egeland ◽  
P. F. Bythrow ◽  
...  
Keyword(s):  
Polar Cusp

Staircase ion signature in the polar cusp: A case study

1992 ◽  
Vol 19 (17) ◽  
pp. 1735-1738 ◽  
Author(s):  
C. P. Escoubet ◽  
M. F. Smith ◽  
S. F. Fung ◽  
P. C. Anderson ◽  
R. A. Hoffman ◽  
...  
Keyword(s):  
Polar Cusp
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