Reduction of angular divergence of internal electron beam of synchrotron

1980 ◽  
Vol 49 (1) ◽  
pp. 503-504
Author(s):  
Z. N. Esina ◽  
B. N. Kalinin
Keyword(s):  
Electron Beam ◽  
Angular Divergence ◽  
Internal Electron

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|.

Investigation of the dynamics of the angular divergence of a radiation beam from a pulsed electron-beam-controlled CO laser

1985 ◽  
Vol 15 (2) ◽  
pp. 201-207
Author(s):  
Yu A Drozhbin ◽  
V D Zvorykin ◽  
Ivan B Kovsh ◽  
V V Trofimenko ◽  
A G Yarova
Keyword(s):  
Electron Beam ◽  
Angular Divergence ◽  
Radiation Beam ◽  
Co Laser ◽  
Pulsed Electron Beam

Collimation of the internal electron beam in a synchrotron

1973 ◽  
Vol 111 (1) ◽  
pp. 39-47 ◽  
Author(s):  
Shiro Suzuki ◽  
Tsuneaki Tsuru ◽  
Takeshi Katayama ◽  
Masaaki Kobayashi ◽  
Seigi Iwata
Keyword(s):  
Electron Beam ◽  
Internal Electron

scholarly journals Two approaches to electron beam enhancement of the metal vapor vacuum arc ion source

2003 ◽  
Vol 21 (1) ◽  
pp. 103-108
Author(s):  
B.M. JOHNSON ◽  
A. HERSHCOVITCH ◽  
A.S. BUGAEV ◽  
V.I. GUSHENETS ◽  
E.M. OKS ◽  
...  
Keyword(s):  
Electron Beam ◽  
National Laboratory ◽  
Metal Vapor ◽  
Brookhaven National Laboratory ◽  
Ion Source ◽  
Vacuum Arc ◽  
High Current Electronics ◽  
Experimental Physics ◽  
Internal Electron ◽  
Charge States

Conclusive demonstration of electron-beam enhancement of ion charge states for the Metal Vapor Vacuum Arc (MEVVA) ion source was recently achieved using an external electron beam (E-MEVVA) in experiments performed jointly among the Institute for Theoretical and Experimental Physics (ITEP), Moscow, Russia, the High Current Electronics Institute (HCEI), Tomsk, Russia, and Brookhaven National Laboratory (BNL), USA. The E-MEVVA experiments were performed in Moscow and Tomsk with nearly the same design of ion sources. Results for lead and bismuth cathodes yielded maximum ion charge states of Pb7+ and Bi8+ for E-MEVVA, as compared to Pb2+ and Bi2+ for conventional MEVVA operation. Additional encouraging results were also obtained using a Z-discharge to produce an internal electron-beam (Z-MEVVA and LIZ-MEV).

Optimal pumping conditions for pulsed electron-beam-controlled lasers allowing for angular divergence of the radiation

1981 ◽  
Vol 11 (2) ◽  
pp. 259-261
Author(s):  
A I Avrov ◽  
E P Glotov ◽  
V A Danilychev ◽  
F F Kamenets ◽  
V M Krasovskiĭ ◽  
...  
Keyword(s):  
Electron Beam ◽  
Angular Divergence ◽  
Pulsed Electron Beam

scholarly journals Повышение эффективности систем дистанционного радиационного контроля на базе линейного ускорителя электронов

2021 ◽  
Vol 91 (7) ◽  
pp. 1174
Author(s):  
Б.Ю. Богданович ◽  
Г.О. Буянов ◽  
А.В. Нестерович
Keyword(s):  
Magnetic Field ◽  
Electron Beam ◽  
Phase Portrait ◽  
Vertical Direction ◽  
Transverse Magnetic ◽  
Horizontal Position ◽  
Angular Divergence ◽  
Bremsstrahlung Radiation ◽  
Special Configuration ◽  
The Magnetic Field

The efficiency of the existing systems of introscopy, tomography and customs control is largely determined by the loss of quanta of bremsstrahlung radiation in systems to collimation, especially in the primary collimator. This article discusses a system of preliminary "cooling" of an electron beam and a decrease in the angular divergence of the flux of quanta due to multiple passes of the electron beam in a chamber placed in a transverse magnetic field. "Cooling" of the electron beam is provided by a special configuration of the magnetic field. In the proposed scheme, the phase portrait undergoes the simplest changes, namely, it increases abruptly in the foil, as if "stretching" in the vertical direction, but then, as it were, "rotates" around the origin, while reaching a horizontal position after "focusing". Thus, the transverse dimensions of the beam increase, and the angular spread, at least, does not increase, as without "cooling".

Influence of gasdynamic motion of the active medium during a pump pulse on the angular divergence of radiation emitted from electron-beam-controlled lasers

1978 ◽  
Vol 8 (9) ◽  
pp. 1089-1093 ◽  
Author(s):  
E P Glotov ◽  
V A Danillychev ◽  
A E Kruglyĭ ◽  
V V Pustovalov ◽  
A M Soroka ◽  
...  
Keyword(s):  
Electron Beam ◽  
Active Medium ◽  
Pump Pulse ◽  
Angular Divergence
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