scholarly journals Theoretical analysis and simulation of the influence of self-bunching effects and longitudinal space charge effects on the propagation of keV electron bunch produced by a novel S-band Micro-Pulse electron Gun

AIP Advances ◽  
2016 ◽  
Vol 6 (6) ◽  
pp. 065327 ◽  
Author(s):  
Jifei Zhao ◽  
Xiangyang Lu ◽  
Kui Zhou ◽  
Ziqin Yang ◽  
Deyu Yang ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Space Charge ◽  
Electron Bunch ◽  
Electron Gun ◽  
Pulse Electron ◽  
Space Charge Effects ◽  
Charge Effects

scholarly journals Ultra-High Velocity Ratio in Magnetron Injection Guns for Low-Voltage Compact Gyrotrons

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1587
Author(s):  
Dun Lu ◽  
Wenjie Fu ◽  
Xiaotong Guan ◽  
Tongbin Yang ◽  
Chaoyang Zhang ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Space Charge ◽  
High Velocity ◽  
Low Voltage ◽  
Simulation Optimization ◽  
Velocity Ratio ◽  
Space Charge Effects ◽  
Charge Effects ◽  
Beam Voltage ◽  
Interaction Efficiency

Low-voltage compact gyrotron is under development at the University of Electronic Science and Technology of China (UESTC) for industrial applications. Due to the low operating voltage, the relativistic factor is weak, and interaction efficiency could not be high. Therefore, a magnetron-injection gun (MIG) with an extremely high-velocity ratio α (around 2.5) is selected to improve the interaction efficiency. As beam voltage drops, space charge effects become more and more obvious, thus a more detailed analysis of velocity-ratio α is significant to perform low-voltage gyrotrons, including beam voltage, beam current, modulating voltage, depression voltage, cathode magnetic field, and magnetic depression ratio. Theoretical analysis and simulation optimization are adopted to demonstrate the feasibility of an ultra-high velocity ratio, which considers the space charge effects. Based on theoretical analysis, an electron gun with a transverse to longitudinal velocity ratio 2.55 and velocity spread 9.3% is designed through simulation optimization. The working voltage and current are 10 kV and 0.46 A with cathode emission density 1 A/cm2 for a 75 GHz hundreds of watts’ output power gyrotron.

scholarly journals Numerical analysis of space charge effects in electron bunches at laser-driven plasma accelerators

Open Physics ◽  
2011 ◽  
Vol 9 (4) ◽  
Author(s):  
Anthony Ashmore ◽  
Riccardo Bartolini ◽  
Nicolas Delerue
Keyword(s):  
Space Charge ◽  
Electron Bunch ◽  
Beam Quality ◽  
Experimental Studies ◽  
High Energy ◽  
Space Charge Effects ◽  
Charge Effects ◽  
Electron Bunches ◽  
Plasma Accelerators ◽  
Beam Parameters

AbstractLaser-driven Plasma Accelerators (LPA) have successfully generated high energy, high charge electron bunches which can reach many kA peak current, over short distances. Space charge issues, even in transport lines as simple as a drift section, have to be carefully taken into account since they can degrade the beam quality, preventing any further application of such electron beams. We analyse the space charge effects within an electron bunch with numerical simulations in order to assess their effect on the beam. We use LPA beam parameters published in previous experimental studies. These studies can give an indication of the working point where space charge can dominate the beam dynamics and has to be taken into account in the application of such beams.

scholarly journals Space Charge Effects in Noble-Liquid Calorimeters and Time Projection Chambers

Instruments ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 9
Author(s):  
Sandro Palestini
Keyword(s):  
Space Charge ◽  
Scaling Laws ◽  
Relative Size ◽  
Design Solution ◽  
Space Charge Effects ◽  
Charge Effects ◽  
Time Projection Chambers ◽  
Drift Length ◽  
Calibration Methods ◽  
Time Projection

The subject of space charge in ionization detectors is reviewed, showing how the observations and the formalism used to describe the effects have evolved, starting with applications to calorimeters and reaching recent, large time-projection chambers. General scaling laws, and different ways to present and model the effects are presented. The relations between space-charge effects and the boundary conditions imposed on the side faces of the detector are discussed, together with a design solution that mitigates some of the effects. The implications of the relative size of drift length and transverse detector size are illustrated. Calibration methods are briefly discussed.

scholarly journals Numerical investigation of space charge effects on the positions of beamlets for transversely split beams

2017 ◽  
Vol 20 (12) ◽  
Author(s):  
S. Machida ◽  
C. Prior ◽  
S. Gilardoni ◽  
M. Giovannozzi ◽  
A. Huschauer ◽  
...  
Keyword(s):  
Space Charge ◽  
Numerical Investigation ◽  
Space Charge Effects ◽  
Charge Effects

scholarly journals Space charge effects on the third order coupled resonance

2017 ◽  
Vol 20 (8) ◽  
Author(s):  
Giuliano Franchetti ◽  
Simone Gilardoni ◽  
Alexander Huschauer ◽  
Frank Schmidt ◽  
Raymond Wasef
Keyword(s):  
Space Charge ◽  
Space Charge Effects ◽  
Third Order ◽  
Charge Effects ◽  
The Third

scholarly journals Space-Charge Effects in the Field-Assisted Thermionic Emission from Nonuniform Cathodes

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Anna Sitek ◽  
Kristinn Torfason ◽  
Andrei Manolescu ◽  
Ágúst Valfells
Keyword(s):  
Space Charge ◽  
Thermionic Emission ◽  
Space Charge Effects ◽  
Charge Effects
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