Determining Magnetic Field Close to Air-Bearing Surface by Projection Electron-Beam Tomography and Fourier Extrapolation

2010 ◽  
Vol 3 (4) ◽  
pp. 223-228
Author(s):  
Hiroyuki SHINADA ◽  
Yoshihiro MIDOH ◽  
Tomokazu SHIMAKURA ◽  
Koji NAKAMAE
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Electron Beam Tomography ◽  
Air Bearing ◽  
Bearing Surface

Time-resolved measurement of micro-magnetic field by stroboscopic electron beam tomography

1992 ◽  
Vol 28 (5) ◽  
pp. 3117-3122 ◽  
Author(s):  
H. Shinada ◽  
H. Suzuki ◽  
S. Sasaki ◽  
H. Todokoro ◽  
H. Takano ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Electron Beam Tomography ◽  
Time Resolved

Magnetic head field over the air-bearing surface as visualized by the projection of a patterned electron beam

2000 ◽  
Vol 36 (5) ◽  
pp. 3614-3617 ◽  
Author(s):  
H. Suzuki ◽  
T. Shimakura ◽  
K. Itoh ◽  
K. Nakamura
Keyword(s):  
Electron Beam ◽  
Air Bearing ◽  
Magnetic Head ◽  
Bearing Surface

Transient time measurement of head magnetic field by using electron beam tomography

1999 ◽  
Vol 35 (5) ◽  
pp. 2529-2531 ◽  
Author(s):  
K. Nakamura ◽  
Y. Maruyama ◽  
H. Suzuki ◽  
K. Itoho ◽  
H. Takano
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Time Measurement ◽  
Electron Beam Tomography ◽  
Transient Time

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.

scholarly journals Double layers in the downward current region of the aurora

2003 ◽  
Vol 10 (1/2) ◽  
pp. 45-52 ◽  
Author(s):  
R. E. Ergun ◽  
L. Andersson ◽  
C. W. Carlson ◽  
D. L. Newman ◽  
M. V. Goldman
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Phase Space ◽  
Electric Field ◽  
Electric Fields ◽  
Double Layers ◽  
Parallel Electric Field ◽  
Electrostatic Waves ◽  
Current Region ◽  
Decisive Evidence

Abstract. Direct observations of magnetic-field-aligned (parallel) electric fields in the downward current region of the aurora provide decisive evidence of naturally occurring double layers. We report measurements of parallel electric fields, electron fluxes and ion fluxes related to double layers that are responsible for particle acceleration. The observations suggest that parallel electric fields organize into a structure of three distinct, narrowly-confined regions along the magnetic field (B). In the "ramp" region, the measured parallel electric field forms a nearly-monotonic potential ramp that is localized to ~ 10 Debye lengths along B. The ramp is moving parallel to B at the ion acoustic speed (vs) and in the same direction as the accelerated electrons. On the high-potential side of the ramp, in the "beam" region, an unstable electron beam is seen for roughly another 10 Debye lengths along B. The electron beam is rapidly stabilized by intense electrostatic waves and nonlinear structures interpreted as electron phase-space holes. The "wave" region is physically separated from the ramp by the beam region. Numerical simulations reproduce a similar ramp structure, beam region, electrostatic turbulence region and plasma characteristics as seen in the observations. These results suggest that large double layers can account for the parallel electric field in the downward current region and that intense electrostatic turbulence rapidly stabilizes the accelerated electron distributions. These results also demonstrate that parallel electric fields are directly associated with the generation of large-amplitude electron phase-space holes and plasma waves.

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