scholarly journals Investigations on beam-current-pulse-shortening in a long pulse relativistic klystron amplifier

2004 ◽  
Vol 53 (4) ◽  
pp. 1129
Author(s):  
Huang Hua ◽  
Fan Zhi-Kai ◽  
Tan Jie ◽  
Ma Qiao-Sheng ◽  
Gan Yan-Qing ◽  
...  
Keyword(s):  
Current Pulse ◽  
Beam Current ◽  
Beam Current Pulse ◽  
Long Pulse ◽  
Relativistic Klystron

scholarly journals Time behavior of an electron beam current pulse in the axial and peripheral zones of an anode in vacuum and gas-filled diodes

2021 ◽  
Vol 2064 (1) ◽  
pp. 012031
Author(s):  
D A Sorokin ◽  
M I Lomaev ◽  
A V Dyatlov ◽  
V F Tarasenko
Keyword(s):  
Electron Beam ◽  
Current Pulse ◽  
Current Density ◽  
Beam Current ◽  
Beam Current Density ◽  
Electron Beam Current ◽  
Time Behavior ◽  
Beam Current Pulse ◽  
Axial Part ◽  
A Current

Abstract The study of the time behavior of a current pulse of an electron beam generated during a high-voltage nanosecond discharge in gas-filled and vacuum diodes has been carried out. As follows from the experimental results, in both cases, the distribution of the beam current density in the plane of a grounded anode is non-uniform. The highest beam current density is recorded in the axial part of the anode. It was established that in the case of a gas-filled diode, ~ 2 ns after the onset of the beam current pulse, its shape in the axial anode zone changes relative to that in the peripheral one. It is assumed that the most probable reason for this is the effect of compensation of the charge of the beam electrons by the positive charge of ions arising in the ionization process in the paraxial zone.

scholarly journals Energy density distribution of a modulated electron beam in a source with a plasma cathode based on a low pressure arc

2021 ◽  
Vol 2064 (1) ◽  
pp. 012066
Author(s):  
V I Shin ◽  
P V Moskvin ◽  
M S Vorobyov ◽  
V N Devyatkov ◽  
N N Koval
Keyword(s):  
Electron Beam ◽  
Energy Density ◽  
Density Distribution ◽  
Current Pulse ◽  
Current Density ◽  
Beam Current ◽  
Beam Current Pulse ◽  
Energy Density Distribution ◽  
Electron Beam Generation ◽  
Arc Current

Abstract The article presents the results of studies devoted to the study of the energy density distribution in the amplitude-modulated regime of electron beam generation. It is shown that in the first ≈ 50 μs of the duration of the beam current pulse, its spatial rearrangement occurs, due to the development of the arc discharge current. Thus, the rearrangement of the arc current, which develops from the axis of the system, leads to an axial diving of the emission current density and the beam current density on the target. With the development of the arc current, the energy density on the target on the axis of the system decreases and after ≈ 50 μs takes on a steady-state value, which can change only as a result of a change in the conditions for generating an electron beam or the transition to a modulated regime of electron beam generation. It has been experimentally shown using calorimetric measurements that the shape of the electron beam current pulse with its amplitude modulation with a pulse duration of more than 100 μs has little effect on the distribution of the beam energy density in the target region.

Output power variations in a plasma relativistic microwave amplifier during a 500-ns relativistic electron beam current pulse

2014 ◽  
Vol 40 (8) ◽  
pp. 640-649 ◽  
Author(s):  
P. S. Strelkov ◽  
V. P. Tarakanov ◽  
I. E. Ivanov ◽  
D. V. Shumeiko
Keyword(s):  
Electron Beam ◽  
Relativistic Electron ◽  
Current Pulse ◽  
Output Power ◽  
Relativistic Electron Beam ◽  
Beam Current ◽  
Electron Beam Current ◽  
Beam Current Pulse ◽  
Microwave Amplifier

Investigation of an ${X}$ -Band Long Pulse High-Power High-Gain Coaxial Multibeam Relativistic Klystron Amplifier

2019 ◽  
Vol 66 (1) ◽  
pp. 722-728 ◽  
Author(s):  
Zhenbang Liu ◽  
Hua Huang ◽  
Xiao Jin ◽  
Shifeng Li ◽  
Tengfang Wang ◽  
...  
Keyword(s):  
High Power ◽  
High Gain ◽  
Long Pulse ◽  
Relativistic Klystron

Fluctuations and nonuniformity of the ion beam current and electron flow in a long‐pulse, appliedBrmagnetically insulated ion diode

1986 ◽  
Vol 59 (11) ◽  
pp. 3716-3721 ◽  
Author(s):  
Yoshiro Nakagawa ◽  
Tamotsu Enomoto
Keyword(s):  
Ion Beam ◽  
Electron Flow ◽  
Beam Current ◽  
Long Pulse

scholarly journals Филаментация и самофокусировка электронных пучков в вакуумных и газовых диодах

2019 ◽  
Vol 45 (7) ◽  
pp. 3
Author(s):  
В.И. Олешко ◽  
В.Ф. Тарасенко ◽  
А.Г. Бураченко ◽  
V.V. Nguyen
Keyword(s):  
Energy Density ◽  
Electron Beams ◽  
Local Density ◽  
Beam Current ◽  
Beam Current Density ◽  
Runaway Electrons ◽  
Beam Current Pulse ◽  
Average Electron Energy ◽  
Interelectrode Gap ◽  
Average Electron

AbstractIn this paper, we experimentally studied pulsed electron beams with a high local density. The conditions in which the energy density cumulation is observed during the interaction of electrons with the anode are shown to develop in vacuum and gas diodes at nanosecond and subnanosecond durations of a beam current pulse and a decrease in the interelectrode gap. The average electron energy in filamentation and self-focusing of an electron beam in a vacuum diode of an accelerator at a current of ~2 kA and a no-load voltage of ~400 kV was established to be 50–100 keV while the energy density was 10^9–10^10 J/cm^3. It is confirmed that the beam current density in a gas diode can exceed 1 kA/cm^2. It is hypothesized that superdense electron beams in vacuum and gas diodes are formed as a result of avalanche multiplication of runaway electrons in the cathode–anode gap plasma.

Investigation on pulse-shortening ofS-band, long pulse, four-cavity, high power relativistic klystron amplifier

2019 ◽  
Vol 26 (3) ◽  
pp. 033107 ◽  
Author(s):  
Hua Huang ◽  
Zhaofu Chen ◽  
Shifeng Li ◽  
Hu He ◽  
Huan Yuan ◽  
...  
Keyword(s):  
High Power ◽  
Long Pulse ◽  
Relativistic Klystron

Design and preliminary experiment of a disk-beam relativistic klystron amplifier for Ku-band long-pulse high power microwave radiation

2020 ◽  
Vol 27 (11) ◽  
pp. 113101
Author(s):  
Fangchao Dang ◽  
Jinchuan Ju ◽  
Fuxiang Yang ◽  
Xingjun Ge ◽  
Jun Zhang ◽  
...  
Keyword(s):  
Microwave Radiation ◽  
High Power ◽  
High Power Microwave ◽  
Long Pulse ◽  
Relativistic Klystron ◽  
Power Microwave ◽  
Ku Band

Long pulse operation of 170GHz ITER gyrotron by beam current control

2006 ◽  
Vol 81 (23-24) ◽  
pp. 2791-2796 ◽  
Author(s):  
A. Kasugai ◽  
R. Minami ◽  
K. Takahashi ◽  
N. Kobayashi ◽  
K. Sakamoto
Keyword(s):  
Beam Current ◽  
Current Control ◽  
Pulse Operation ◽  
Long Pulse
Sign in / Sign up

Export Citation Format

Share Document