scholarly journals Structure and dynamics of the nightside poleward boundary: Sounding rocket and ground-based observations of auroral electron precipitation in a rayed curtain

2012 ◽  
Vol 117 (A11) ◽  
pp. n/a-n/a ◽  
Author(s):  
K. A. Lynch ◽  
D. Hampton ◽  
M. Mella ◽  
Binzheng Zhang ◽  
H. Dahlgren ◽  
...  
Keyword(s):  
Electron Precipitation ◽  
Sounding Rocket ◽  
Structure And Dynamics ◽  
Auroral Electron

scholarly journals Auroral ion outflow: low altitude energization

2007 ◽  
Vol 25 (9) ◽  
pp. 1967-1977 ◽  
Author(s):  
K. A. Lynch ◽  
J. L. Semeter ◽  
M. Zettergren ◽  
P. Kintner ◽  
R. Arnoldy ◽  
...  
Keyword(s):  
Electron Temperature ◽  
Scale Height ◽  
Electron Precipitation ◽  
Sounding Rocket ◽  
Time Varying ◽  
Ion Outflow ◽  
F Region ◽  
Low Energies ◽  
Moderate Energy ◽  
Low Altitude

Abstract. The SIERRA nightside auroral sounding rocket made observations of the origins of ion upflow, at topside F-region altitudes (below 700 km), comparatively large topside plasma densities (above 20 000/cc), and low energies (10 eV). Upflowing ions with bulk velocities up to 2 km/s are seen in conjunction with the poleward edge of a nightside substorm arc. The upflow is limited within the poleward edge to a region (a) of northward convection, (b) where Alfvénic and Pedersen conductivities are well-matched, leading to good ionospheric transmission of Alfvénic power, and (c) of soft electron precipitation (below 100 eV). Models of the effect of the soft precipitation show strong increases in electron temperature, increasing the scale height and initiating ion upflow. Throughout the entire poleward edge, precipitation of moderate-energy (100s of eV) protons and oxygen is also observed. This ion precipitation is interpreted as reflection from a higher-altitude, time-varying field-aligned potential of upgoing transversely heated ion conics seeded by the low altitude upflow.

Transverse ion acceleration and auroral electron precipitation

1993 ◽  
Vol 13 (4) ◽  
pp. 143-148 ◽  
Author(s):  
R. Arnoldy ◽  
K. Lynch ◽  
P. Kintner ◽  
J. Vago ◽  
C.J. Pollock ◽  
...  
Keyword(s):  
Electron Precipitation ◽  
Ion Acceleration ◽  
Auroral Electron

Quantification of Diffuse Auroral Electron Precipitation Driven by Whistler Mode Waves at Jupiter

2021 ◽  
Author(s):  
Wen Li ◽  
Q. Ma ◽  
X.‐C. Shen ◽  
X.‐J. Zhang ◽  
B. H. Mauk ◽  
...  
Keyword(s):  
Electron Precipitation ◽  
Whistler Mode ◽  
Auroral Electron ◽  
Whistler Mode Waves

A statistical model of auroral electron precipitation

1985 ◽  
Vol 90 (A5) ◽  
pp. 4229 ◽  
Author(s):  
D. A. Hardy ◽  
M. S. Gussenhoven ◽  
E. Holeman
Keyword(s):  
Statistical Model ◽  
Electron Precipitation ◽  
Auroral Electron

scholarly journals Parallel electric fields inferred during a pulsating aurora

2006 ◽  
Vol 24 (7) ◽  
pp. 1829-1837 ◽  
Author(s):  
J. D. Williams ◽  
E. MacDonald ◽  
M. McCarthy ◽  
L. Peticolas ◽  
G. K. Parks
Keyword(s):  
Electron Transport ◽  
Electric Fields ◽  
Electric Potential ◽  
Large Range ◽  
Potential Drop ◽  
Electron Precipitation ◽  
Sounding Rocket ◽  
Energetic Electrons ◽  
Upward Direction ◽  
Simulation Results

Abstract. A sounding rocket, equipped to study pulsating aurora launched from Poker Flat, Alaska on 13 March 1997 at 10:20:31 UT, measured electron precipitation over the range ~10 eV to 500 keV covering pitch-angles from 0 to 180°. Data show electrons with energies <1 keV are mostly secondaries produced below the rocket altitude by the higher energy precipitated electrons. We observed nearly equal fluxes of up and down going electrons for energies <1 keV at altitudes from 265 to 380 km. Electron transport simulation results indicate the secondaries produced by the more energetic electrons will have two times higher flux in the upward direction as compared to the downward direction. Our observations of nearly equal fluxes of up and downgoing electrons over a large range of altitudes is consistent with the presence of an electric potential above the rocket that reflects the upgoing electrons back toward the rocket where they are detected as downward going electrons. The strength of the potential is estimated to be 1.5±0.5 kV and its location is no greater than 5000km above the rocket. Finally, the inferred potential drop exists independently of the presence of pulsations.

Sign in / Sign up

Export Citation Format

Share Document