Design and Simulation of Lossy Interaction Structure for Ka-Band Gyro-TWT

作者：Alaria Mukesh Kumar^*; Ghosh Sanjay Kumar; Choyal Y; Sinha Ashok Kumar; Jain P K

来源：IEEE Transactions on Plasma Science, 2013, 41(8): 2264-2268.

DOI：10.1109/TPS.2013.2258685

• Beam wave interaction
• dispersion
• gyroton traveling wave tube (gyro-TWT)
• interaction impedance

In this paper, beam-wave interaction analysis in a Ka-band periodically ceramic loaded gyrotron traveling-wave tube (gyro-TWT) amplifier is investigated using particle-in-cell (PIC) simulation. The simulations predict that the interaction structure can produce more than 80-kW output power, 50-dB saturated gain, and 3-dB bandwidth is 2.56 GHz for 65 kV and 5-A electron beam with velocity ratio (alpha) of 1.2. The dispersion and interaction impedance characteristics of the ceramic-loaded gyro-TWT amplifier are also determined using 3-D simulator CST-microwave studio. This paper describes the design and simulation of a high performance 35-GHz TE01 mode gyro-TWT that applies the same technique of employing a periodic dielectric loaded interaction structure to achieve stability and wide bandwidth. The stability of this gyro-amplifier is excellent and demonstrates that the ceramic loading is highly effective for suppressing the spurious oscillations in gyro-TWT.

• 出版日期2013-8