CRPP, Association Euratom-Confédération Suisse
Ecole Polytechnique Fédérale de Lausanne, Switzerland.

Particle-In-Cell (PIC) Simulations of Beam Instabilities in Gyrotrons

T.M. Tran - G. Jost - K. Appert - S. Alberti - M. Pedrozzi

January 20 1997

Abstract:

Extensive simulations are performed to investigate effects of electron cyclotron instabilities on the gyrotron beam quality, using two-dimensional axisymmetric particle-in-cell (PIC) codes. Both electrostatic and electromagnetic models, as well as realistic geometries of the gyrotron are considered. It is found that a large beam density can lead to an electrostatic-instability-induced energy spread which substantially degrades the gyrotron efficiency.

41.75.Ht, 52.35.Qz, 52.65.Rr, 84.40.Ik

• Introduction
• PIC Simulation Models
• Review of Linear Results
• 2D Electrostatic Simulations
• 2D Electromagnetic Simulations
• Conclusion
• References
• About this document ...