Efficinecy enhancement of a 40-beam S-band klystron using clustered cavity design and optimization of the structure

Jafari, Ali; Qaneh Qarehbagh, Yaqob; Hamidi, Emad; Ashrafi Gharyehali,, Seyed Ahmad

doi:10.22034/joeds.2024.453216.1040

Efficinecy enhancement of a 40-beam S-band klystron using clustered cavity design and optimization of the structure

Document Type : Original Article

Authors

Ali Jafari ¹

Yaqob Qaneh Qarehbagh ²

emad hamidi ³

Seyed Ahmad Ashrafi gharyehali, ¹

¹ Faculty of Electrical Engineering, Imam Hossein University, Tehran , Iran

² imam hossein university

³ Faculty of Electrical &amp; Computer Engineering, Malek Ashtar University of Technology, Iran

10.22034/joeds.2024.453216.1040

Abstract

Today, the compression of the klystron tube is one of the most important topics for accelerators, along with high output power and efficiency. Multi-beam klystrons have the ability to generate high output power, with lower working voltage and interaction length of the wavelength with the beam than single-beam klystrons, and as a result, they will have less volume and weight. In this paper, the design and simulation of the wave-beam interaction region for a 40-beam klystron tube in S-band has been done using the second harmonic method, and the increase in efficiency has been introduced for the first time by the design method with a clustered cavity. According to the results of design, simulation and then optimization by local method, the output power of 15MW has been achieved in the interaction length of 238.8mm for the working frequency of 2856MHz and the input power of 13W. The efficiency and gain of the structure are equal to 76% and 60.66 dB, respectively.

Keywords

Klystron

L-band

Multi-beam

Reduce Bunching length

High power

Optimization