Electron beam emission and interaction of double-beam gyrotron

• Published in: Fusion engineering and design 2012-09, Vol.87 (9), p.1583-1588
• Main Authors: Singh, Udaybir, Kumar, Anil, Kumar, Nitin, Kumar, Narendra, Pratap, Bhanu, Purohit, L.P., Sinha, A.K.
• Format: Article
• Language: English
• Subjects: Beams (radiation); Computational efficiency; Computer simulation; DB-MIG; Design parameters; Double-beam gyrotron; Electron beams; Gyro-device; Gyrotrons; Magnetron injection gun (MIG); Mathematical analysis; Voltage
• ISSN: 0920-3796; 1873-7196
• DOI: 10.1016/j.fusengdes.2012.04.024

► The complete electrical design of electron gun and interaction structure of double-beam gyrotron. ► EGUN code is used for the simulation of electron gun of double-beam gyrotron. ► MAGIC code is used for the simulation of interaction structure of double-beam gyrotron. ► Design validations with other codes. This paper presents the numerical simulation of a double-beam magnetron injection gun (DB-MIG) and beam-wave interaction for 60GHz, 500kW gyrotron. The beam-wave interaction calculations, power and frequency growth estimation are performed by using PIC code MAGIC. The maximum output power of 510kW at 41.5% efficiency, beam currents of 6A and 12A, electron beam velocity ratios of 1.41 and 1.25 and beam voltage of 69kV are estimated. To obtain the design parameters, the DB-MIG with maximum transverse velocity spread less than 5% is designed. The computer simulations are performed by using the commercially available code EGUN and the in-house developed code MIGANS. The simulated results of DB-MIG design obtained by using the EGUN code are also validated with another trajectory code TRAK, which are in good agreement.