Title :
3D CFDTD PIC simulation study on low-frequency oscillations in a gyrotron
Author :
Lin, M.C. ; Smithe, D.N.
Author_Institution :
Tech-X Corp., Boulder, CO, USA
Abstract :
Low frequency oscillations (LFOs) have been obtained in a 3D time domain simulation for the first time. From our preliminary simulation studies, it is found that not only magnetic compression profile but initial velocity or velocity ratio play an important role in the operation of a MIG electron gun. In addition, the secondary emission effects on the LFOs are also studied. The frequency of LFOs has been estimated by a periodic asymmetric oscillator model, close to the experimental values.
Keywords :
electron guns; finite difference time-domain analysis; gyrotrons; oscillators; secondary emission; 3D CFDTD PIC simulation study; 3D time domain simulation; LFO; MIG electron gun; gyrotron; initial velocity ratio; low-frequency oscillation; magnetic compression profile; periodic asymmetric oscillator model; secondary emission effect; Electron traps; Finite difference methods; Gyrotrons; Magnetic domains; Oscillators; Solid modeling; Time domain analysis; Low-frequency oscillations; conformal finite-difference time-domain particle-in-cell; gyrotron; magnetic mirror; magnetron injection gun;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2012 IEEE Thirteenth International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4673-0188-6
Electronic_ISBN :
978-1-4673-0187-9
DOI :
10.1109/IVEC.2012.6262269
