FEL2012 - List of Authors (Huang, W.-H.)

Paper	Title	Page
MOPD55	RF DESIGN AND HIGH POWER TESTS OF A NEW TSINGHUA PHOTOCATHODE RF GUN	165
	H.J. Qian, Y.-C. Du, J.F. Hua, W.-H. Huang, C. Li, C.-X. Tang, L.X. Yan TUB, Beijing, People's Republic of China
	A new photocathode RF gun has been designed and fabricated to meet beam brightness requirements (0.5-1 nC, 1-2 mm mrad) of Tsinghua Thomson scattering project (TTX) and Shanghai soft X-ray free electron laser test facillity (SXFEL). Compared with classical BNL type gun, the new Tsinghua gun features improved cathode sealing structure, 0-mode and multipole field suppression, and higher quality factor. Single RF feed is kept in the new gun for simplicity, and beam dynamics due to single RF feed are investigated theoretically, which predict negligible emittance growth. After high power conditioning, the new gun operates stably with a peak acceleration gradient of ~120 MV/m. Measurements of dark current, Quantum Efficiency (QE), and transverse emittance are presented and discussed in this paper.

WEPD49	The Terahertz FEL Facility Project at CAEP	484
	X. Yang, M. Li, Z. Xu CAEP/IAE, Mianyang, Sichuan, People's Republic of China Y.H. Dou, X.J. Shu Institute of Applied Physics and Computational Mathematics, People's Republic of China W.-H. Huang TUB, Beijing, People's Republic of China X.Y. Lu PKU, Beijing, People's Republic of China
	To meet the requirement of material and biomedicine study, a terahertz FEL user facility project was proposed by China Academy of Engineering Physics(CAEP), at present the project has been approved and the facility will be constructed within 5 years. The facility will operate in the quasi CW mode and the average power is about 10W. The wavelength of the light can be regulated between 100μm/3THz to 300μm/1THz according to the user necessary by changing the electron energy and the magnetic field of the wiggler. In order to achieve the high brightness beam, the photocathode DC gun will be used as the electron source. The electron energy after a superconducting accelerator is about 8MeV, which is suitable to obtain the terahertz light. The facility will be a useful tool to the science.

Paper

Title

Page

RF DESIGN AND HIGH POWER TESTS OF A NEW TSINGHUA PHOTOCATHODE RF GUN

165

H.J. Qian, Y.-C. Du, J.F. Hua, W.-H. Huang, C. Li, C.-X. Tang, L.X. Yan
TUB, Beijing, People's Republic of China

A new photocathode RF gun has been designed and fabricated to meet beam brightness requirements (0.5-1 nC, 1-2 mm mrad) of Tsinghua Thomson scattering project (TTX) and Shanghai soft X-ray free electron laser test facillity (SXFEL). Compared with classical BNL type gun, the new Tsinghua gun features improved cathode sealing structure, 0-mode and multipole field suppression, and higher quality factor. Single RF feed is kept in the new gun for simplicity, and beam dynamics due to single RF feed are investigated theoretically, which predict negligible emittance growth. After high power conditioning, the new gun operates stably with a peak acceleration gradient of ~120 MV/m. Measurements of dark current, Quantum Efficiency (QE), and transverse emittance are presented and discussed in this paper.

WEPD49

The Terahertz FEL Facility Project at CAEP

484

X. Yang, M. Li, Z. Xu
CAEP/IAE, Mianyang, Sichuan, People's Republic of China
Y.H. Dou, X.J. Shu
Institute of Applied Physics and Computational Mathematics, People's Republic of China
W.-H. Huang
TUB, Beijing, People's Republic of China
X.Y. Lu
PKU, Beijing, People's Republic of China

To meet the requirement of material and biomedicine study, a terahertz FEL user facility project was proposed by China Academy of Engineering Physics(CAEP), at present the project has been approved and the facility will be constructed within 5 years. The facility will operate in the quasi CW mode and the average power is about 10W. The wavelength of the light can be regulated between 100μm/3THz to 300μm/1THz according to the user necessary by changing the electron energy and the magnetic field of the wiggler. In order to achieve the high brightness beam, the photocathode DC gun will be used as the electron source. The electron energy after a superconducting accelerator is about 8MeV, which is suitable to obtain the terahertz light. The facility will be a useful tool to the science.