IPAC2013 - List of Authors (Jia, H.)

Paper	Title	Page
MOPEA042	Research on the Design and Simulation of the CSRE Stochastic Cooling System	169
	X.J. Hu, H. Jia, Y.J. Yuan, X.H. Zhang IMP, Lanzhou, People's Republic of China
	Stochastic cooling by the use of a feedback system, aims at cooling of secondary particles or particles with large emittance or momentum spread. My research is mainly on the simulation of horizontal and longitudinal stochastic cooling process. The purpose of my work is to obtain the optimum parameters for stochastic cooling, according the actual accelerator lattice. Pickup and preamplifier are already installed on the CSRe, and preliminary results are get.

MOPME045	Design and Test Status of Beam Position Monitors for ADS Injector II Proton LINAC	574
	Y. Zhang, H. Jia, X.C. Kang, M. Li, J.X. Wu, G. Zhu IMP, Lanzhou, People's Republic of China
	Beam Position Monitors (BPM) based on capacitive pick-ups are designed for Accelerator-Driven System (ADS) Injector II proton LINAC. This LINAC is aiming to produce a maximum design current of 15 mA at the 10 MeV energy with an operating frequency of 162.5 MHz. Non-interceptive BPM will be installed to measure the transverse beam position and beam phase in the vacuum chamber. Depending on the location, the response of the BPMs must be optimized for a beam with an energy range from 2.1 up to 10 MeV and an average current between 0.01 and 15 mA. Apart from the broadening of the electromagnetic field due to the low-beta beam, specific issues are affecting some of the BPMs: tiny space in the transport line between the RFQ and the cryomodule and the cryogenic temperature inside the cryomodule. For this reason two types of BPMs are being designed for each location (MEBT and cryomoudle). In this contribution, the present status of the design and measured results for each BPM will be presented in room and cold temperature, focusing on the electromagnetic response for low-beta beams.

TUPWA059	End-to-end Beam Simulations for the C-ADS Injector II	1838
	X. Wu, E. Tanke, Q. Zhao FRIB, East Lansing, Michigan, USA Y. He, H. Jia, Z.J. Wang, H.W. Zhao IMP, Lanzhou, People's Republic of China
	The Injector II for the proposed Chinese Accelerator Driven System (C-ADS) is designed to accelerate proton beam to ~ 10 MeV with beam current up to ~ 10 mA. The accelerator system will include a proton ECR ion source, a Low Energy Beam Transport System (LEBT), a room-temperature radio frequency quadrupole (RFQ), a Medium Energy Beam Transport System (MEBT), a Superconducting (SC) linac and a High Energy Beam Transport System (HEBT). Both RFQ and the SC linac will have a base frequency of 162.5 MHz. The accelerating cryomodules in the SC linac uses SC half-wave cavities for acceleration and SC solenoids with dipole correctors for transverse focusing and central orbit correction. End-to-end beam simulations starting with a realistic initial input beam from the ECR ion source were performed using DYNAC and IMPACT codes to evaluate the C-ADS Injector II accelerator system performance, code benchmarking with TRACK and explore system design options for future optimizations. The results of these beam dynamics studies will be presented in the paper.

Paper

Title

Page

Research on the Design and Simulation of the CSRE Stochastic Cooling System

169

X.J. Hu, H. Jia, Y.J. Yuan, X.H. Zhang
IMP, Lanzhou, People's Republic of China

Stochastic cooling by the use of a feedback system, aims at cooling of secondary particles or particles with large emittance or momentum spread. My research is mainly on the simulation of horizontal and longitudinal stochastic cooling process. The purpose of my work is to obtain the optimum parameters for stochastic cooling, according the actual accelerator lattice. Pickup and preamplifier are already installed on the CSRe, and preliminary results are get.

MOPME045

Design and Test Status of Beam Position Monitors for ADS Injector II Proton LINAC

574

Y. Zhang, H. Jia, X.C. Kang, M. Li, J.X. Wu, G. Zhu
IMP, Lanzhou, People's Republic of China

Beam Position Monitors (BPM) based on capacitive pick-ups are designed for Accelerator-Driven System (ADS) Injector II proton LINAC. This LINAC is aiming to produce a maximum design current of 15 mA at the 10 MeV energy with an operating frequency of 162.5 MHz. Non-interceptive BPM will be installed to measure the transverse beam position and beam phase in the vacuum chamber. Depending on the location, the response of the BPMs must be optimized for a beam with an energy range from 2.1 up to 10 MeV and an average current between 0.01 and 15 mA. Apart from the broadening of the electromagnetic field due to the low-beta beam, specific issues are affecting some of the BPMs: tiny space in the transport line between the RFQ and the cryomodule and the cryogenic temperature inside the cryomodule. For this reason two types of BPMs are being designed for each location (MEBT and cryomoudle). In this contribution, the present status of the design and measured results for each BPM will be presented in room and cold temperature, focusing on the electromagnetic response for low-beta beams.

TUPWA059

End-to-end Beam Simulations for the C-ADS Injector II

1838

X. Wu, E. Tanke, Q. Zhao
FRIB, East Lansing, Michigan, USA
Y. He, H. Jia, Z.J. Wang, H.W. Zhao
IMP, Lanzhou, People's Republic of China

The Injector II for the proposed Chinese Accelerator Driven System (C-ADS) is designed to accelerate proton beam to ~ 10 MeV with beam current up to ~ 10 mA. The accelerator system will include a proton ECR ion source, a Low Energy Beam Transport System (LEBT), a room-temperature radio frequency quadrupole (RFQ), a Medium Energy Beam Transport System (MEBT), a Superconducting (SC) linac and a High Energy Beam Transport System (HEBT). Both RFQ and the SC linac will have a base frequency of 162.5 MHz. The accelerating cryomodules in the SC linac uses SC half-wave cavities for acceleration and SC solenoids with dipole correctors for transverse focusing and central orbit correction. End-to-end beam simulations starting with a realistic initial input beam from the ECR ion source were performed using DYNAC and IMPACT codes to evaluate the C-ADS Injector II accelerator system performance, code benchmarking with TRACK and explore system design options for future optimizations. The results of these beam dynamics studies will be presented in the paper.