TWANG-PIC, a novel gyro-averaged one-dimensional particle-in-cell code for interpretation of gyrotron experiments

被引：30

作者：

Braunmueller, F. ^{[1
]}

Tran, T. M. ^{[1
]}

Vuillemin, Q. ^{[2
]}

Alberti, S. ^{[1
]}

Genoud, J. ^{[1
]}

Hogge, J. -Ph. ^{[1
]}

Tran, M. Q. ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, CRPP, CH-1015 Lausanne, Switzerland

[2] Inst Phys Nucl, F-91406 Orsay, France

来源：

PHYSICS OF PLASMAS | 2015年 / 22卷 / 06期

关键词：

SIMULATION; CAVITY;

D O I：

10.1063/1.4923299

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A new gyrotron simulation code for simulating the beam-wave interaction using a monomode time-dependent self-consistent model is presented. The new code TWANG-PIC is derived from the trajectory-based code TWANG by describing the electron motion in a gyro-averaged one-dimensional Particle-In-Cell (PIC) approach. In comparison to common PIC-codes, it is distinguished by its computation speed, which makes its use in parameter scans and in experiment interpretation possible. A benchmark of the new code is presented as well as a comparative study between the two codes. This study shows that the inclusion of a time-dependence in the electron equations, as it is the case in the PIC-approach, is mandatory for simulating any kind of non-stationary oscillations in gyrotrons. Finally, the new code is compared with experimental results and some implications of the violated model assumptions in the TWANG code are disclosed for a gyrotron experiment in which non-stationary regimes have been observed and for a critical case that is of interest in high power gyrotron development.

引用

页数：9