Title :
Design of a continuous wave Ka-band extended interaction klystron
Author :
Dongping Gao ; Zhaochuan Zhang ; Yaogen Ding ; Bin Shen ; Haibing Ding
Author_Institution :
Key Lab. of High Power Microwave Source & Technol., Inst. of Electron., Beijing, China
Abstract :
A continuous wave Ka-band extended interaction klystron producing output power of 3 kW and bandwidth of 100MHz has been designed in Institute of Electronics, Chinese Academy of Sciences (IECAS). The electron beam voltage is 17kV, beam current is 0.9A, tube radius is 0.5mm and beam radius is 0.3mm. Electron optical system has been well optimized because of the continuous operating mode. The beam compression factor is 53:1 and the average emit current density in cathode is 6A/cm2. There are six cavities, single gap input cavity and five double gap coupled cavity. Double gap coupled cavities operate in 2pi mode and the efficiency exceeds 20% in required bandwidth. Design considerations and details are addressed in this paper.
Keywords :
electron beam focusing; electron optics; klystrons; Ka-band extended interaction klystron; bandwidth 100 MHz; beam compression factor; continuous operating mode; continuous wave klystron; current 0.9 A; current density; electron optical system; power 3 kW; size 0.5 mm; voltage 17 kV; Bandwidth; Cathodes; Cavity resonators; Electron beams; Klystrons; Power generation; Continuous Wave; Extended Interaction Klystron (EIK);
Conference_Titel :
Vacuum Electronics Conference, IEEE International
Conference_Location :
Monterey, CA
DOI :
10.1109/IVEC.2014.6857636
