scholarly journals Faraday Cup for Electron Flux Measurements on the Microtron MT 25

10.14311/176 ◽  
2001 ◽  
Vol 41 (1) ◽  
Author(s):  
M. Vognar ◽  
Č. Šimáně ◽  
D. Chvátil
Keyword(s):  
Electron Beam ◽  
Precise Measurement ◽  
Electron Flux ◽  
Measuring Line ◽  
Faraday Cup ◽  
Flux Measurements ◽  
Beam Currents ◽  
Physical Engineering ◽  
Entry Window

The basic criteria for constructing of an evacuated Faraday cup for precise measurement of 5 to 25 MeV electron beam currents in air from a microtron are established. The Faraday cup, built in the microtron laboratory of the Faculty of Nuclear Sciences and Physical Engineering of CTU Prague, is described together with the electronic chain and its incorporation in the measuring line on the beam. Measures to reduce the backward escape of electrons are explained. The range of currents is from 10–5 to 10–10 A. The diameter of the Al entry window of the Faraday cup is 1.8 cm, and its area is 2.54 cm2. The thickness of the entry window is 0.1 mm.

Plasma Sheet Convection Velocities Inferred From Electron Flux Measurements at Synchronous Altitude

Radio Science ◽  
1971 ◽  
Vol 6 (2) ◽  
pp. 305-313 ◽  
Author(s):  
E. G. Shelley ◽  
R. G. Johnson ◽  
R. D. Sharp
Keyword(s):  
Plasma Sheet ◽  
Electron Flux ◽  
Flux Measurements

Annihilation Behaviors of Athermal ω-Phase Crystals Due to Electron Irradiation

2000 ◽  
Vol 6 (4) ◽  
pp. 362-367 ◽  
Author(s):  
Hajime Matsumoto ◽  
Eiichi Sukedai ◽  
Hatsujiro Hashimoto
Keyword(s):  
Electron Beam ◽  
Electron Irradiation ◽  
Beam Current ◽  
Dark Field ◽  
Electron Beam Current ◽  
Ω Phase ◽  
Observation Methods ◽  
Incubation Periods ◽  
Beam Currents

AbstractAnnihilation behaviors of athermal ω-phase crystals formed by cooling at 131 K for 10.8 ks under four different electron irradiation conditions of acceleration voltages of 200 kV and 160 kV, and beam currents of approximately 20 pA/cm2 and 5 pA/cm2 were investigated using in situ dark field and HREM observation methods at 131 K. The effect of acceleration voltages on the lifetimes is recognized, i.e., in the case of approximately equal electron beam current, lifetimes at 200 kV become shorter than those at 160 kV. Also, lifetimes depend on the electron beam current at 200 kV, i.e., the higher the beam currents, the shorter the lifetimes become. However, no distinct dependence can be seen at 160 kV. Since annihilations of athermal ω-phase crystals begin after the electron irradiation for a certain period in each condition, which depends on acceleration voltages and beam currents, it is suggested that the annihilation behaviors have incubation periods.

Electron beam induced oxidation of Ni3Al surfaces: electron flux effects

2002 ◽  
Vol 507-510 ◽  
pp. 486-491
Author(s):  
S.A. Koch ◽  
G. Palasantzas ◽  
D.T.L. van Agterveld ◽  
J.Th.M. De Hosson
Keyword(s):  
Electron Beam ◽  
Electron Flux

Nightside electron flux measurements at Mars by the Phobos-2 HARP instrument

1995 ◽  
Vol 22 (7) ◽  
pp. 863-866 ◽  
Author(s):  
N. Shutte ◽  
K. Gringauz ◽  
P. Király ◽  
G. Kotova ◽  
A. F. Nagy ◽  
...  
Keyword(s):  
Electron Flux ◽  
Flux Measurements

Time-resolved ion flux measurements in pulsed, electron-beam-generated plasmas

2002 ◽  
Vol 65 (4) ◽  
Author(s):  
S. G. Walton ◽  
D. Leonhardt ◽  
D. D. Blackwell ◽  
R. F. Fernsler ◽  
D. P. Murphy ◽  
...  
Keyword(s):  
Electron Beam ◽  
Ion Flux ◽  
Time Resolved ◽  
Pulsed Electron Beam ◽  
Flux Measurements

Effect of Electron Beam Currents on Welding Quality of CLAM Steel for High Density Cooling Channels

2015 ◽  
Vol 34 (4) ◽  
pp. 895-900 ◽  
Author(s):  
Yutao Zhai ◽  
Chunjing Li ◽  
Bo Huang ◽  
Qunying Huang ◽  
Junyu Zhang
Keyword(s):  
Electron Beam ◽  
High Density ◽  
Welding Quality ◽  
Clam Steel ◽  
Cooling Channels ◽  
Beam Currents
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