Numerical Simulation of MIG for 42 GHz, 200 kW Gyrotron
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Numerical Simulation of MIG for 42 GHz, 200 kW Gyrotron Udaybir Singh & Anirban Bera & Narendra Kumar & L. P. Purohit & Ashok K. Sinha
Received: 28 April 2009 / Accepted: 2 February 2010 / Published online: 27 February 2010 # Springer Science+Business Media, LLC 2010
Abstract A triode type magnetron injection gun (MIG) of a 42 GHz, 200 kW gyrotron for an Indian TOKAMAK system is designed by using the commercially available code EGUN. The operating voltages of the modulating anode and the accelerating anode are 29 kV and 65 kV respectively. The operating mode of the gyrotron is TE03 and it is operated in fundamental harmonic. The simulated results of MIG obtained with the EGUN code are validated with another trajectory code TRAK. Keywords Magnetron injection gun . Gyro-devices . Gyrotron
1 Introduction The gyrotron is a device to generate very high powers at very high frequencies. The magnetron injection gun (MIG) is a critical component in the gyrotron and a source of the gyrating electron beam [1–6]. The triode-type MIG of a 42 GHz, 200 kW gyrotron for an Indian TOKAMAK system is designed with the beam voltage (V0)=65 kV, the beam current (I0)=10 A and the transverse to the axial velocity ratio of the gyrating beam (α)= 1.26. Triode type MIG is preferable because of its additional control over the beam properties. The operating mode of the gyrotron is TE03 and the gyrating electron beam is U. Singh (*) : A. Bera : N. Kumar : A. K. Sinha Gyrotron Laboratory, Microwave Tube Area, Central Electronics Engineering Research Institute (CEERI) (A constituent laboratory of Council of Scientific and Industrial Research, CSIR), Pilani, Rajasthan 333031, India e-mail: [email protected] A. Bera e-mail: [email protected] A. K. Sinha e-mail: [email protected] L. P. Purohit Department of Physics, Gurukul Kangri Vishwavidyalaya, Haridwar 249404, India
J Infrared Milli Terahz Waves (2010) 31:708–713
709
Table 1 Basic specifications for the MIG design. Beam voltage (V0)
65 kV
Beam current (I0)
10 A
Magnetic field at interaction region (B0) Beam radius (rb)
1.65 T 6.06 mm
Transverse to axial velocity ratio (α)
1.5
Transverse velocity spread (δv⊥max)
Data Loading...
