Coherent structures in an electron beam
Andrea Illiberi, Giovanni Bettega, Marco Cavenago, Franca De Luca, Roberto Pozzoli, Massimiliano Rome', Yuri Tsidulko
Abstract
The formation and evolution of coherent structures in a low-energy electron beam produced in a Malmberg-Penning trap is investigated by means of CCD diagnostics. The electrons are emitted from a thermionic cathode and their energy is controlled by an acceleration grid. By varying the spatial distribution of the energy of emitted electrons, different space charge effects are observed, as, e. g., a sharp or a gradual transition to a space charge dominated regime. The variation of the coherent structures along the beam is studied by varying the electron density or/and the value of the confined magnetic field. The observed processes are interpreted using a tridimensional particle-in-cell code which solves the Vlasov-Poisson system in zeroth order drift approximation.
Create a lesson
Related papers
High-Efficiency Wakefield Acceleration of Positrons via a Slit Plasma Channel
Yu-Jie Wang, Xing-Long Zhu, Hong-Kang Zuo et al.
A Two-Dimensional Physics-Informed Neural Network Model of a Hall Effect Thruster Plasma: Self-Consistent Electrostatics and Physical-Consistency Diagnostics
Josh Adjedj, Subrata Roy
Dynamics of Vortex Electrons in a Uniform Magnetic Field Across Nonrelativistic and Relativistic Regimes
Yujian Lin, Zhigang Bu, Shiyu Liu et al.
Comparison of models for dynamical structures of solar plasma
S. N. Artekha
Numerical Study of Two-Frequency Heating in ECR Ion Source
E. Yu. Kidanova, V. E. Mironov, D. K. Pugachev
Stabilization of kinetic plasma instabilities via instantaneous external field control
Jiyoung Yoo, Jingwei Hu