IPAC2015 - List of Authors (Liu, Y.D.)

Paper	Title	Page
MOPWA060	THE COUPLING IMPEDANCE MEASUREMENT OF THE FAST EXTRACTION KICKER IN CSNS/RCS *	262
	L. Huang, Y.D. Liu, S. Wang IHEP, Beijing, People's Republic of China
	Rapid Cycling Synchrotron of the China Spallation Neutron Source is a high intensity proton accelerator. In order to high intensity beam operation, the beam coupling impedance of the extracted kickers must be controlled. The measurement of longitudinal and transverse coupling impedance of the extraction kicker is described. Supported by National Natural Science Foundation of China (11175193, 11275221)
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA060
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MOPWA066	Simulation on Buildup of Electron Cloud in Rapid Cycling Synchrotron of China Spallation Neutron Source	275
	K.W. Li, L. Huang, Y.D. Liu, S. Wang IHEP, Beijing, People's Republic of China
	Funding: Work supported by National Natural Science Foundation of China (11275221) Electron cloud interaction with high energy positive beam are believed responsible for various undesirable effects such as vacuum degradation, collective beam instability and even beam loss in high power proton circular accelerator. An important uncertainty in predicting electron cloud instability lies in the detail processes on the generation and accumulation of the electron cloud. The simulation on the build-up of electron cloud is necessary to further studies on beam instability caused by electron cloud. China Spallation Neutron Source (CSNS) is the largest scientific project in building, whose accelerator complex includes two main parts: an H⁻ linac and a rapid cycling synchrotron (RCS). The RCS accumulates the 80 MeV proton beam and accelerates it to 1.6 GeV with a repetition rate 25 Hz. During the beam injection with lower energy, the emerging electron cloud may cause a serious instability and beam loss on the vacuum pipe. A simulation code has been developed to simulate the build-up, distribution and density of electron cloud in CSNS/RCS.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA066
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THPF054	XAL Development for CSNS/RCS Commissioning	3821
	Y.W. An, L. Huang, W.B. Liu, Y.D. Liu, S. Wang, Y. Wei IHEP, Beijing, People's Republic of China
	Funding: Work supported by the National Natural Science Fund Committee, contract 11405189. As a key component of the China Spallation Neutron Source (CSNS) Project, the Rapid Cycling Synchrotron (RCS) accumulates and accelerates the proton beam from 80MeV to 1.6GeV for extracting and striking the target with a repetition rate of 25Hz. A high level application programming framework code called XAL, based on Java Language with a well-performance online model, initially developed at the Spallation Neutron Source (SNS), has been installed as a part of control system via connection to EPICS for CSNS. Much of the applications have been initially established such as Tune Scan, Tune Monitor, Orbit Response Matrix Measurement, RCS Orbit Display, and Beta Function Measurement for preparing CSNS/RCS commissioning are showed in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF054
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Paper

Title

Page

THE COUPLING IMPEDANCE MEASUREMENT OF THE FAST EXTRACTION KICKER IN CSNS/RCS *

262

L. Huang, Y.D. Liu, S. Wang
IHEP, Beijing, People's Republic of China

Rapid Cycling Synchrotron of the China Spallation Neutron Source is a high intensity proton accelerator. In order to high intensity beam operation, the beam coupling impedance of the extracted kickers must be controlled. The measurement of longitudinal and transverse coupling impedance of the extraction kicker is described.
Supported by National Natural Science Foundation of China (11175193, 11275221)

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA060

Export •

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

MOPWA066

Simulation on Buildup of Electron Cloud in Rapid Cycling Synchrotron of China Spallation Neutron Source

275

K.W. Li, L. Huang, Y.D. Liu, S. Wang
IHEP, Beijing, People's Republic of China

Funding: Work supported by National Natural Science Foundation of China (11275221)
Electron cloud interaction with high energy positive beam are believed responsible for various undesirable effects such as vacuum degradation, collective beam instability and even beam loss in high power proton circular accelerator. An important uncertainty in predicting electron cloud instability lies in the detail processes on the generation and accumulation of the electron cloud. The simulation on the build-up of electron cloud is necessary to further studies on beam instability caused by electron cloud. China Spallation Neutron Source (CSNS) is the largest scientific project in building, whose accelerator complex includes two main parts: an H⁻ linac and a rapid cycling synchrotron (RCS). The RCS accumulates the 80 MeV proton beam and accelerates it to 1.6 GeV with a repetition rate 25 Hz. During the beam injection with lower energy, the emerging electron cloud may cause a serious instability and beam loss on the vacuum pipe. A simulation code has been developed to simulate the build-up, distribution and density of electron cloud in CSNS/RCS.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA066

Export •

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

THPF054

XAL Development for CSNS/RCS Commissioning

3821

Y.W. An, L. Huang, W.B. Liu, Y.D. Liu, S. Wang, Y. Wei
IHEP, Beijing, People's Republic of China

Funding: Work supported by the National Natural Science Fund Committee, contract 11405189.
As a key component of the China Spallation Neutron Source (CSNS) Project, the Rapid Cycling Synchrotron (RCS) accumulates and accelerates the proton beam from 80MeV to 1.6GeV for extracting and striking the target with a repetition rate of 25Hz. A high level application programming framework code called XAL, based on Java Language with a well-performance online model, initially developed at the Spallation Neutron Source (SNS), has been installed as a part of control system via connection to EPICS for CSNS. Much of the applications have been initially established such as Tune Scan, Tune Monitor, Orbit Response Matrix Measurement, RCS Orbit Display, and Beta Function Measurement for preparing CSNS/RCS commissioning are showed in this paper.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF054

Export •

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