Abstract
An analysis based on the law of conservation of the z component of field and particle momentum in a thin annular magnetized monoenergetic electron beam in a two-section drift tube composed of tube segments with different radii (R1 < R2) allowed the critical injected beam current to be determined for which a virtual cathode, formed in the wider tube at the joint section, starts traveling through the narrower tube toward the beam injection region. A region behind the traveling virtual cathode features a "squeezed" single-flux state of the beam (corresponding to the "slow" left branch of the current characteristic, high charge density, but low relativistic factor). When the injected current decreases below a critical transition level (Iin < ITr), the virtual cathode returns to the initial position and restores the double-flux electron beam. This current is smaller than (Ilim1 + Ilim2)/2, and, depending on R2, varies from the limiting transport current for the narrower section (Ilim1) up to IF/2, where IF is the Fedosov current for this tube section.
| Original language | English |
|---|---|
| Pages (from-to) | 944-946 |
| Number of pages | 3 |
| Journal | Technical Physics Letters |
| Volume | 29 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 2003 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
The Electron Beam with Virtual Cathode in a Two-Section Drift Tube. / Grishkov, A. A.; Belomyttsev, S. Ya; Korovin, S. D.; Ryzhov, V. V.
In: Technical Physics Letters, Vol. 29, No. 11, 11.2003, p. 944-946.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The Electron Beam with Virtual Cathode in a Two-Section Drift Tube
AU - Grishkov, A. A.
AU - Belomyttsev, S. Ya
AU - Korovin, S. D.
AU - Ryzhov, V. V.
PY - 2003/11
Y1 - 2003/11
N2 - An analysis based on the law of conservation of the z component of field and particle momentum in a thin annular magnetized monoenergetic electron beam in a two-section drift tube composed of tube segments with different radii (R1 < R2) allowed the critical injected beam current to be determined for which a virtual cathode, formed in the wider tube at the joint section, starts traveling through the narrower tube toward the beam injection region. A region behind the traveling virtual cathode features a "squeezed" single-flux state of the beam (corresponding to the "slow" left branch of the current characteristic, high charge density, but low relativistic factor). When the injected current decreases below a critical transition level (Iin < ITr), the virtual cathode returns to the initial position and restores the double-flux electron beam. This current is smaller than (Ilim1 + Ilim2)/2, and, depending on R2, varies from the limiting transport current for the narrower section (Ilim1) up to IF/2, where IF is the Fedosov current for this tube section.
AB - An analysis based on the law of conservation of the z component of field and particle momentum in a thin annular magnetized monoenergetic electron beam in a two-section drift tube composed of tube segments with different radii (R1 < R2) allowed the critical injected beam current to be determined for which a virtual cathode, formed in the wider tube at the joint section, starts traveling through the narrower tube toward the beam injection region. A region behind the traveling virtual cathode features a "squeezed" single-flux state of the beam (corresponding to the "slow" left branch of the current characteristic, high charge density, but low relativistic factor). When the injected current decreases below a critical transition level (Iin < ITr), the virtual cathode returns to the initial position and restores the double-flux electron beam. This current is smaller than (Ilim1 + Ilim2)/2, and, depending on R2, varies from the limiting transport current for the narrower section (Ilim1) up to IF/2, where IF is the Fedosov current for this tube section.
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U2 - 10.1134/1.1631372
DO - 10.1134/1.1631372
M3 - Article
VL - 29
SP - 944
EP - 946
JO - Technical Physics Letters
JF - Technical Physics Letters
SN - 1063-7850
IS - 11
ER -