scholarly journals Auroral hiss, electron beams and standing Alfvén wave currents near Saturn's moon Enceladus

2011 ◽  
Vol 38 (6) ◽  
pp. n/a-n/a ◽  
Author(s):  
D. A. Gurnett ◽  
T. F. Averkamp ◽  
P. Schippers ◽  
A. M. Persoon ◽  
G. B. Hospodarsky ◽  
...  
Keyword(s):  
Electron Beams ◽  
Alfven Wave ◽  
Auroral Hiss

scholarly journals Electron beams as the source of whistler-mode auroral hiss at Saturn

2010 ◽  
Vol 37 (9) ◽  
pp. n/a-n/a ◽  
Author(s):  
A. J. Kopf ◽  
D. A. Gurnett ◽  
J. D. Menietti ◽  
P. Schippers ◽  
C. S. Arridge ◽  
...  
Keyword(s):  
Electron Beams ◽  
Whistler Mode ◽  
Auroral Hiss

scholarly journals The relationship between auroral hiss at high altitudes over the polar caps and the substorm dynamics of aurora

2005 ◽  
Vol 23 (6) ◽  
pp. 2117-2128 ◽  
Author(s):  
E. E. Titova ◽  
A. G. Yahnin ◽  
O. Santolík ◽  
D. A. Gurnett ◽  
F. Jirícek ◽  
...  
Keyword(s):  
Electron Beams ◽  
Cutoff Frequency ◽  
Vertical Component ◽  
Auroral Oval ◽  
High Altitudes ◽  
Poynting Flux ◽  
Wave Measurements ◽  
Polar Caps ◽  
Auroral Hiss ◽  
Auroral Phenomena

Abstract. Strong variations of intensity and cutoff frequency of the auroral hiss were observed by INTERBALL-2 and POLAR satellites at high altitudes, poleward from the auroral oval. The hiss intensifications are correlated with the auroral activations during substorms and/or pseudo-breakups. The low cutoff frequency of auroral hiss increases with the distance between the aurora and the satellite footprint. Multicomponent wave measurements of the hiss emissions on board the POLAR spacecraft show that the horizontal component of the Poynting flux of auroral hiss changes its direction in good accordance with longitudinal displacements of the bright auroras. The vertical component of the Poynting flux is directed upward from the aurora region, indicating that hiss could be generated by upgoing electron beams. This relationship between hiss and the aurora dynamics means that the upgoing electron beams are closely related to downgoing electron beams which produce the aurora. During the auroral activations the upgoing and downgoing beams move and change their intensities simultaneously. Keywords. Magnetospheric physics (Auroral phenomena; Plasma waves and instabilities; Storms and substorms)

Correlation of auroral hiss and upward electron beams near the polar cusp

1984 ◽  
Vol 89 (A2) ◽  
pp. 925 ◽  
Author(s):  
C. S. Lin ◽  
J. L. Burch ◽  
S. D. Shawhan ◽  
D. A. Gurnett
Keyword(s):  
Electron Beams ◽  
Polar Cusp ◽  
Auroral Hiss

Materials for Electron Beam Information Storage

1969 ◽  
Vol 27 ◽  
pp. 152-153 ◽  
Author(s):  
D. E. Speliotis
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Recent Literature ◽  
Electron Beams ◽  
Information Storage ◽  
The Subject ◽  
The Magnetic Field

The interaction of electron beams with a large variety of materials for information storage has been the subject of numerous proposals and studies in the recent literature. The materials range from photographic to thermoplastic and magnetic, and the interactions with the electron beam for writing and reading the information utilize the energy, or the current, or even the magnetic field associated with the electron beam.

Energy Distribution in Electron Beams

1972 ◽  
Vol 30 ◽  
pp. 568-569
Author(s):  
Tamotsu Ohno
Keyword(s):  
Electron Beam ◽  
Energy Distribution ◽  
Cross Section ◽  
Integral Curve ◽  
Electron Beams ◽  
Electron Gun ◽  
Angular Divergence ◽  
Apparent Increase ◽  
Integral Width ◽  
The Cross

The energy distribution in an electron; beam from an electron gun provided with a biased Wehnelt cylinder was measured by a retarding potential analyser. All the measurements were carried out with a beam of small angular divergence (<3xl0-4 rad) to eliminate the apparent increase of energy width as pointed out by Ichinokawa.The cross section of the beam from a gun with a tungsten hairpin cathode varies as shown in Fig.1a with the bias voltage Vg. The central part of the beam was analysed. An example of the integral curve as well as the energy spectrum is shown in Fig.2. The integral width of the spectrum ΔEi varies with Vg as shown in Fig.1b The width ΔEi is smaller than the Maxwellian width near the cut-off. As |Vg| is decreased, ΔEi increases beyond the Maxwellian width, reaches a maximum and then decreases. Note that the cross section of the beam enlarges with decreasing |Vg|.

TAPERED WIGGLER FREE ELECTRON LASERS DRIVEN BY NON-MONOENERGETIC ELECTRON BEAMS

1983 ◽  
Vol 44 (C1) ◽  
pp. C1-371-C1-371 ◽  
Author(s):  
J. C. Goldstein ◽  
W. B. Colson ◽  
R. W. Warren
Keyword(s):  
Free Electron ◽  
Electron Beams ◽  
Free Electron Lasers ◽  
Monoenergetic Electron

EXPERIMENTS WITH PHOLARIZED ELECTRON BEAMS AT HERA

1985 ◽  
Vol 46 (C2) ◽  
pp. C2-583-C2-592
Author(s):  
P. Schmüser
Keyword(s):  
Electron Beams

Collective Methods of Particle Acceleration in a Plasma and in Heavy-Current Electron Beams

1972 ◽  
Vol 107 (6) ◽  
pp. 326
Author(s):  
A.A. Kolomenskii ◽  
M.S. Rabinovich ◽  
Ya.B. Fainberg
Keyword(s):  
Particle Acceleration ◽  
Electron Beams ◽  
Current Electron
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