Details

Autor(en) / Beteiligte

• Ding, Yaogen
• Gao, Dongping
• Shen, Bin
• Ding, Haibing

Titel

The Study on the Uniformity of Electric Field Distribution in the Coaxial Cavity Output Circuit of the Multi-Beam Klystron

Ist Teil von

• 2023 24th International Vacuum Electronics Conference (IVEC), 2023, p.1-2

Ort / Verlag

IEEE

Erscheinungsjahr

2023

Quelle

IEEE Xplore

Beschreibungen/Notizen

• High peak power multi-beam klystrons (MBKs) often use coaxial cavity as RF interaction circuits. Due to the influence of the coupling port between the cavity and the waveguide, the electric field distribution in the electron beam channels is uneven, so that the efficiency of the MBKs cannot reach the maximum. Based on the design of X band 3MW MBK, the electric field distribution of several types of coaxial cavity output circuits is calculated by using CST microwave studio. It is found that adding a fan-shaped metal ring to the inner conductor of the coaxial cavity can make the electric field distribution distortion, thus compensating for the electric field non-uniformity caused by the coupling port. This structure combined with filter loaded circuit can further improve the electric field uniformity. Comparing with the traditional output structure, the ratio of the maximum value to the minimum value of the characteristic impedance R/Q of the electron beam channels of this structure decreases from 9.83 to 1.45, and the efficiency of the MBK increases from 43.7% to 52.15%.