Large Area Thermionic Cathode and Its Prilimiary Experimental Results

YANG An-Ming; XIA Lian-Sheng; ZHANG Huang; ZHANG Kai-Zhi; SHI Jin-Shui; DENG Jian-Jun

Chinese Physics C> 2008, Vol. 32> Issue(S1) : 286-288

Large Area Thermionic Cathode and Its Prilimiary Experimental Results

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Abstract：
A 2MeV thermionic cathode test stand was established to meet the requirement of the large area thermionic cathode system. A 100mm in diameter type ``B''thermionic dispenser cathode was developed. A 1000A emission current was produced at the voltage of the diode about 1.8MV, the pulse width about 90ns(FWHM), and the cathode temperature about 1350℃. The emission current density is 12A/cm². The results indicate that a large area thermionic cathode which produces high quality and high current electron beams is visible. The results also indicate that the ability of cathode emission relies on the diode-vacuum and cathode-temperature.

References

[1]

. XIA Lian-Shen, ZHANG Huang et al. HEP NP, 2006, 30(5): 471-4742. Stanley Humphries, Jr. Charged Particle Beams. ZHAO Kui interpret et al. Beijing: Atomic Energy Press, 1999. 157-158(in Chinese)(小斯坦利·汉弗莱斯. 带电粒子束. 赵夔等译. 北京: 原子能出版社, 1999. 157-158)3. Scarpetti R D, Nath S et al. Status of the Darht 2nd AXIS Accelerator at the Los Alamos National Laboratory. Proceedings of PAC07, Albuquerque, New Mexico, USA4. DAI G S, XIE M, LIU X P et al. The Pulsed Power System for 2MV Electron Beam Source. In: Editorial Office of HPLPB, Proc. 3rd Intern. Symposium on Pulsed Power andPlasma Applications. Sichuan: Editorial Office of HPLPB, 2002. 201

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YANG An-Ming, XIA Lian-Sheng, ZHANG Huang, ZHANG Kai-Zhi, SHI Jin-Shui and DENG Jian-Jun. Large Area Thermionic Cathode and Its Prilimiary Experimental Results[J]. Chinese Physics C, 2008, 32(S1): 286-288.

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Received: 2008-01-11
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Large Area Thermionic Cathode and Its Prilimiary Experimental Results

Corresponding author: YANG An-Ming,

Received Date: 2008-01-11
Accepted Date: 1900-01-01
Available Online: 2008-01-04

Abstract: A 2MeV thermionic cathode test stand was established to meet the requirement of the large area thermionic cathode system. A 100mm in diameter type ``B''thermionic dispenser cathode was developed. A 1000A emission current was produced at the voltage of the diode about 1.8MV, the pulse width about 90ns(FWHM), and the cathode temperature about 1350℃. The emission current density is 12A/cm². The results indicate that a large area thermionic cathode which produces high quality and high current electron beams is visible. The results also indicate that the ability of cathode emission relies on the diode-vacuum and cathode-temperature.