Related Experiment Videos
Self-consistent nonstationary processes in phase-mixed electron beams focused by mobile ions
Yu P Bliokh1, G S Nusinovich, J Felsteiner
1Department of Physics, Technion, 32000 Haifa, Israel.
Summary
This study analyzes electron beam propagation with mobile ions in plasma-assisted slow-wave oscillators (pasotrons). It develops a theory for nonstationary self-consistent processes, crucial for understanding ion focusing in these devices.
Area of Science:
- Plasma physics
- Beam-plasma interactions
- Microwave electronics
Background:
- Plasma-assisted slow-wave oscillators (pasotrons) utilize ion focusing for electron beam control.
- Typical pasotron operation involves long pulses (≥100 microseconds), where ion dynamics are significant.
- Understanding nonstationary self-consistent processes is vital for pasotron development.
Purpose of the Study:
- To develop a theoretical framework for nonstationary self-consistent processes in electron beam propagation with mobile ions.
- To analyze the role of ion motion and axial acceleration in pasotron operation.
- To investigate the impact of electron transverse velocity spread on beam dynamics.
Main Methods:
- Theoretical analysis of nonstationary self-consistent processes.
- Inclusion of phase mixing due to electron initial transverse velocity spread.
- Numerical simulations using typical pasotron parameters.
Main Results:
- A theory is presented describing nonstationary self-consistent processes in electron beam-ion systems.
- The study accounts for ion axial acceleration driven by electron interactions.
- Simulation results validate the theoretical model for pasotron conditions.
Conclusions:
- Ion motion is a critical factor in long-pulse pasotron operation.
- The developed theory provides insights into beam focusing and stability in pasotrons.
- Further research can leverage these findings for advanced pasotron design.