The study of high-speed electron beam deflection technology for VSB writers

2004 ◽  
Author(s):  
Junji Hirumi ◽  
Nobuyuki Yoshioka ◽  
Hiromichi Hoshi ◽  
Hiroyoshi Ando ◽  
Seiichi Tsuchiya ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Speed ◽  
Beam Deflection

scholarly journals Study on high-speed beam deflection for electron beam machining.

1986 ◽  
Vol 4 (1) ◽  
pp. 84-90
Author(s):  
Taizo Iwami ◽  
Hidenobu Murakami ◽  
Seiji Yasunaga
Keyword(s):  
Electron Beam ◽  
High Speed ◽  
Beam Deflection

Integrated Rapid Solidification and Heat Treatment using Computerized Electron Beam Processing

1986 ◽  
Vol 80 ◽  
Author(s):  
Atsushi Iwata ◽  
Anjum Tauqir ◽  
Peter R. Strutt
Keyword(s):  
Electron Beam ◽  
High Speed ◽  
High Speed Steel ◽  
Beam Deflection ◽  
Thermal Arrest ◽  
Fast Reaction ◽  
Electron Beam Processing ◽  
Rate Kinetics ◽  
Rapidly Solidified ◽  
High Degree

AbstractMartensitic refinement is observed in rapidly solidified high speed steel (M7) by introducing a short ‘thermal arrest’ during cooling. This is accomplished using microcomputer controlled electron beam deflection for the generation of preselectcd scanning patterns. Such a tcchnique provides a high degree of control over short-duration heating at high temperatures and thus facilitates the use of fast reaction rate kinetics. By programming a ‘thermal arrest’ in the austenite range it has been found possible to obtain a distribution of fine carbides within the solidification cells. These carbides, it was found, result in refinement of the martensitic structure.

Image quality vs data obtainment in biological electron microscopy

1986 ◽  
Vol 44 ◽  
pp. 42-43
Author(s):  
J. E. Johnson
Keyword(s):  
Electron Microscopy ◽  
Endoplasmic Reticulum ◽  
Electron Beam ◽  
Image Quality ◽  
High Speed ◽  
Early Period ◽  
Early Years ◽  
Fluorescent Screen ◽  
Embedding Medium

In the early years of biological electron microscopy, scientists had their hands full attempting to describe the cellular microcosm that was suddenly before them on the fluorescent screen. Mitochondria, Golgi, endoplasmic reticulum, and other myriad organelles were being examined, micrographed, and documented in the literature. A major problem of that early period was the development of methods to cut sections thin enough to study under the electron beam. A microtome designed in 1943 moved the specimen toward a rotary “Cyclone” knife revolving at 12,500 RPM, or 1000 times as fast as an ordinary microtome. It was claimed that no embedding medium was necessary or that soft embedding media could be used. Collecting the sections thus cut sounded a little precarious: “The 0.1 micron sections cut with the high speed knife fly out at a tangent and are dispersed in the air. They may be collected... on... screens held near the knife“.

HIGH SPEED ELECTRON BEAM THERAPY

1967 ◽  
Vol 99 (4) ◽  
pp. 932-938 ◽  
Author(s):  
A. ZUPPINGER
Keyword(s):  
Electron Beam ◽  
High Speed ◽  
Electron Beam Therapy

Accelerating laser processes with a smart two-dimensional polygon mirror scanner for ultra-fast beam deflection

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Florian Roessler ◽  
André Streek
Keyword(s):  
Energy Distribution ◽  
Real Time ◽  
Laser Processing ◽  
High Speed ◽  
Beam Deflection ◽  
Two Dimensional ◽  
Heat Accumulation ◽  
Field Programmable ◽  
Drill Holes ◽  
Average Laser

Abstract In laser processing, the possible throughput is directly scaling with the available average laser power. To avoid unwanted thermal damage due to high pulse energy or heat accumulation during MHz-repetition rates, energy distribution over the workpiece is required. Polygon mirror scanners enable high deflection speeds and thus, a proper energy distribution within a short processing time. The requirements of laser micro processing with up to 10 kW average laser powers and high scan speeds up to 1000 m/s result in a 30 mm aperture two-dimensional polygon mirror scanner with a patented low-distortion mirror configuration. In combination with a field programmable gate array-based real-time logic, position-true high-accuracy laser switching is enabled for 2D, 2.5D, or 3D laser processing capable to drill holes in multi-pass ablation or engraving. A special developed real-time shifter module within the high-speed logic allows, in combination with external axis, the material processing on the fly and hence, processing of workpieces much larger than the scan field.

Fast and accurate electron-beam deflection circuits using two kinds of D-A converters

1981 ◽  
Vol 64 (2) ◽  
pp. 101-107
Author(s):  
Yoshifusa Wada ◽  
Masatoshi Migitaka ◽  
Yasuhide Hisamoto ◽  
Koichiro Mizukami
Keyword(s):  
Electron Beam ◽  
Beam Deflection

Electron-beam test system for high-speed devices

Scanning ◽  
1987 ◽  
Vol 9 (5) ◽  
pp. 201-204 ◽  
Author(s):  
M. Brunner ◽  
D. Winkler ◽  
R. Schmitt ◽  
B. Lischke
Keyword(s):  
Electron Beam ◽  
High Speed ◽  
Test System ◽  
Beam Test
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