HB2012 - List of Keywords (power-supply)

Paper	Title	Other Keywords	Page
MOP214	Test System and Characteristics Studies of Ferrite Cores for the CSNS RCS RF System	cavity, impedance, controls, LLRF	81
	H. Shi, W.L. Huang, X. Li, W. Long, H. Sun, J.Y. Tang, C.L. Zhang IHEP, Beijing, People's Republic of China
	A two-ring ferrite test system for ferrite-loaded cavities of Rapid Cycling Synchrotron (RCS) of China Spallation Neutron Source (CSNS) has been developed. By this system, the RF characteristics of full-sized ferrite cores of RCS cavities have been studied. On dc bias current, the swept frequency range and thresholds of High Loss Effect (HLE) have been presented. On ac bias current of 25 Hz, although the shunt impedance of the cores satisfies the CSNS cavity, comparing with the dc bias, more power dissipation and more required bias current have been observed because the induced magnetic anisotropy of the ferrite cores disappears. Consequently, it is important to evaluate the dynamic features of the cores with 25 Hz bias current for designing the cavities, the power supplies and the bias current sources.

MOP223	Radiation Safety System for PKUNIFTY Project	neutron, radiation, shielding, controls	112
	J. Zhao, J.E. Chen, Z.Y. Guo, Y.R. Lu, S.X. Peng PKU, Beijing, People's Republic of China J. Zhao, Q.F. Zhou State Key Laboratory of Nuclear Physics and Technology, Beijing, Haidian District, People's Republic of China
	PKUNIFTY (Peking University Neutron Imaging FaciliTY) , which is based on a 2 MeV RFQ accelerator-driven compact neutron sourse with an expected fast-neutron yield of 2.9*1012n/s via the deuteron-beryllium reaction, has been operated this year. A radiation safety system for PKUNIFTY, that protects personnel from radiation hazards has been built and run since last year, is described. It consists of a shielding optimized with Monte-Carlo simulation, a dose interlock system, an alternative interlock with another 4.5MV tandem accelerator facility, and a video monitoring system. The dose of supervision area is less than 0.5μSv/h during beam operation.

Paper

Title

Other Keywords

Page

MOP214

Test System and Characteristics Studies of Ferrite Cores for the CSNS RCS RF System

cavity, impedance, controls, LLRF

81

H. Shi, W.L. Huang, X. Li, W. Long, H. Sun, J.Y. Tang, C.L. Zhang
IHEP, Beijing, People's Republic of China

A two-ring ferrite test system for ferrite-loaded cavities of Rapid Cycling Synchrotron (RCS) of China Spallation Neutron Source (CSNS) has been developed. By this system, the RF characteristics of full-sized ferrite cores of RCS cavities have been studied. On dc bias current, the swept frequency range and thresholds of High Loss Effect (HLE) have been presented. On ac bias current of 25 Hz, although the shunt impedance of the cores satisfies the CSNS cavity, comparing with the dc bias, more power dissipation and more required bias current have been observed because the induced magnetic anisotropy of the ferrite cores disappears. Consequently, it is important to evaluate the dynamic features of the cores with 25 Hz bias current for designing the cavities, the power supplies and the bias current sources.

MOP223

Radiation Safety System for PKUNIFTY Project

neutron, radiation, shielding, controls

112

J. Zhao, J.E. Chen, Z.Y. Guo, Y.R. Lu, S.X. Peng
PKU, Beijing, People's Republic of China
J. Zhao, Q.F. Zhou
State Key Laboratory of Nuclear Physics and Technology, Beijing, Haidian District, People's Republic of China

PKUNIFTY (Peking University Neutron Imaging FaciliTY) , which is based on a 2 MeV RFQ accelerator-driven compact neutron sourse with an expected fast-neutron yield of 2.9*1012n/s via the deuteron-beryllium reaction, has been operated this year. A radiation safety system for PKUNIFTY, that protects personnel from radiation hazards has been built and run since last year, is described. It consists of a shielding optimized with Monte-Carlo simulation, a dose interlock system, an alternative interlock with another 4.5MV tandem accelerator facility, and a video monitoring system. The dose of supervision area is less than 0.5μSv/h during beam operation.