IPAC2019 - List of Authors (Zhou, N.)

Paper	Title	Page
WEPRB045	Suppression of Secondary Electron Yield Effect in the 650MHz/800kW Klystron for CEPC	2906
	X. He, C. Meng, S. Pei, J.L. Wang, O. Xiao, N. Zhou IHEP, Beijing, People’s Republic of China
	The circular electron positron collider (CEPC) is in pre-research, it will need more than two hundred 650MHz/800kW klystrons. The secondary electron yield (SEY) effect suppression is very important for the klystron working stable. The simulation uses an incident primary electron source and considers all the phases and power levels of the input microwave. Two methods are simulated for the SEY suppression. The groove cutting on the nose of cavities is much simple while the TiN coating can suppress better. The effect after groove cutting on nose is also simulated and the corresponding compensations are adopted. For simplify the fabrication progress as well as some experience that can be referenced, the groove cutting method is adopted finally for the first klystron prototype, which is expected to be available in the summer of 2019.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-WEPRB045
About •	paper received ※ 13 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPTS034	Design and Progress of Mechanical Support in HEPS	4180
	C.H. Li, Y. Jiao, M.X. Li, H. Wang, Z. Wang, L. Wu, N. Zhou IHEP, Beijing, People’s Republic of China
	HEPS is a new generation synchrotron facility on construction with very low emittance. Stringent requirements are proposed to the design of mechanical support. The alignment error between girders should be less than 50μm. Based on that, the adjusting resolution of the girder are required to be less than 5μm in both transverse and vertical directions. Besides, the Eigen frequency of magnet & girder assembly should be higher than 54Hz to avoid the amplification of ground vibrations. To fulfill these requirements, studies on mechanical support design is now being carried out in HEPS. This paper will describe the design and progress of those work.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS034
About •	paper received ※ 14 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPTS041	Progress and TDR Plans of the Mechanical System of CEPC	4200
	H. Wang, S. Bai, M.X. Li, Y.D. Liu, C. Meng, H. Qu, J.L. Wang, P. Zhang, N. Zhou IHEP, Beijing, People’s Republic of China
	The TDR of CEPC is aimed at the key science and technology problems and makes preparations for the real project. This paper will describe the progress of mechanical system including the regular supports and transport vehicle design, the mockup plan, the installation scenario of machine detector interface (MDI) and the movable collimator, as well as the TDR plans of mechanical system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS041
About •	paper received ※ 28 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Suppression of Secondary Electron Yield Effect in the 650MHz/800kW Klystron for CEPC

2906

X. He, C. Meng, S. Pei, J.L. Wang, O. Xiao, N. Zhou
IHEP, Beijing, People’s Republic of China

The circular electron positron collider (CEPC) is in pre-research, it will need more than two hundred 650MHz/800kW klystrons. The secondary electron yield (SEY) effect suppression is very important for the klystron working stable. The simulation uses an incident primary electron source and considers all the phases and power levels of the input microwave. Two methods are simulated for the SEY suppression. The groove cutting on the nose of cavities is much simple while the TiN coating can suppress better. The effect after groove cutting on nose is also simulated and the corresponding compensations are adopted. For simplify the fabrication progress as well as some experience that can be referenced, the groove cutting method is adopted finally for the first klystron prototype, which is expected to be available in the summer of 2019.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-WEPRB045

About •

paper received ※ 13 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPTS034

Design and Progress of Mechanical Support in HEPS

4180

C.H. Li, Y. Jiao, M.X. Li, H. Wang, Z. Wang, L. Wu, N. Zhou
IHEP, Beijing, People’s Republic of China

HEPS is a new generation synchrotron facility on construction with very low emittance. Stringent requirements are proposed to the design of mechanical support. The alignment error between girders should be less than 50μm. Based on that, the adjusting resolution of the girder are required to be less than 5μm in both transverse and vertical directions. Besides, the Eigen frequency of magnet & girder assembly should be higher than 54Hz to avoid the amplification of ground vibrations. To fulfill these requirements, studies on mechanical support design is now being carried out in HEPS. This paper will describe the design and progress of those work.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS034

About •

paper received ※ 14 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPTS041

Progress and TDR Plans of the Mechanical System of CEPC

4200

H. Wang, S. Bai, M.X. Li, Y.D. Liu, C. Meng, H. Qu, J.L. Wang, P. Zhang, N. Zhou
IHEP, Beijing, People’s Republic of China

The TDR of CEPC is aimed at the key science and technology problems and makes preparations for the real project. This paper will describe the progress of mechanical system including the regular supports and transport vehicle design, the mockup plan, the installation scenario of machine detector interface (MDI) and the movable collimator, as well as the TDR plans of mechanical system.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS041

About •

paper received ※ 28 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)