Emission simulation and secondary electron emission measurement of the cathode in high-power continuous wave magnetron tubes

Author

Shikai Qi ; Xiaoxia Wang ; Jirun Luo ; Mingwei Hu ; Shike Zhao ; Yun Li ; Qi Zhang

Author_Institution

Key Lab. of High Power Microwave Sources & Technol., Inst. of Electron., Beijing, China

fYear

2015

Firstpage

1

Lastpage

2

Abstract

Energy and local distribution of electron around the cathode have been simulated in a 30kW continuous wave magnetron tube which operates in normal output power. According to the simulation results, it is clearly that the cathode of magnetron is bombed by low energy electrons mostly among 0 and 2keV. Based on the fact that most of the back bombardment electron belong to low energy electron, when the energy of incident electron is among 0 and 2keV, the secondary electron emission yield (SEEY) of cathodes provided with different mass percent Re doping W-Re alloy are measured, eventually, we obtain the maximum SEEY of W-Re alloy cathode when adopted by 5%Re doping.

Keywords

magnetrons; rhenium alloys; secondary electron emission; tungsten alloys; SEEY; W-Re; back bombardment electron; electron volt energy 0 keV; electron volt energy 2 keV; high-power continuous wave magnetron tubes; incident electron energy; low energy electrons; mass percent Re doping W-Re alloy; power 30 kW; secondary electron emission yield; Cathodes; Doping; Electron emission; Electron tubes; Metals; Power generation; Surface treatment; CST simulation; alloy cathode; resistive electron bombing; secondary electron emission yield (SEEY); thermostability;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference (IVEC), 2015 IEEE International

Print_ISBN

978-1-4799-7109-1

Type

conf

DOI

10.1109/IVEC.2015.7223863

Filename

7223863