Research on large emission area thermionic cathode

Author

Liansheng Xia ; Yang, Anming ; Zhang, Huang ; Zhang, Kaizhi ; Shi, Linshui ; Zhang, Linwen ; Deng, Lianjun

Author_Institution

Inst. of Fluid Phys., Mianyang, China

fYear

2008

fDate

6-11 July 2008

Firstpage

1

Lastpage

3

Abstract

Because it can provide greater reproducibility and lower emittance beams than does a field emission cathode, the thermionic cathodes have now been used in linear induction accelerators to improve the performance of the injectors. The thermionic dispenser cathodes have been developed in our laboratory and a test stand had also been established to test the performance of the cathodes. The dispenser cathodes with emission diameter of 55m and 100mm were respectively tested on the test stand. The results indicate that the source limiting flow is 12A/cm² which is a little lower than that expected. At the same time, another kind of thermionic cathode LaB₆ is now under construction too. The diameter of this LaB₆ cathode is 70mm.

Keywords

electron field emission; lanthanum compounds; linear accelerators; thermionic cathodes; LaB₆; emittance beams; field emission cathode; large emission area thermionic cathode; linear induction accelerators; size 100 mm; size 55 mm; size 70 mm; source limiting flow; thermionic dispenser cathodes; Acceleration; Cathodes; Electron beams; Heating; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

High Power Particle Beams (BEAMS), 2008 17th International Conference on

Conference_Location

Xian

Type

conf

Filename

6202876