IPAC2017 - List of Authors (He, Y.)

Paper	Title	Page
MOPAB088	A Differential Beam Intensity Monitoring for the CIADS LINAC	325
	Z.P. Xie Hohai University, Nanjing, People's Republic of China Y. He, R. Huang, Z.J. Wang IMP/CAS, Lanzhou, People's Republic of China
	Funding: Work supported by the National Natural Science Foundation of China (Grant No. 91026001) and the Fundamental Research Funds for the Chinese Central Universities The high power Linac places many crucial requirements on the beam diagnostics for the China initiative accelerator driven subcritical(CIADS) facility. Measuring the beam loss is essential for the purpose of machine protections for the facility. A beam position pickup based differential beam current monitoring (BPDBCM) scheme has been proposed for the MEBT section at CIADS. Discussions of the principles for the scheme and the realtionship between beam intensity measurement and the pulse length are presented. Simulations are performed and they demonstrate that the proposed system can be effective at the low enery section for the CIADS beam. This paper describes the proposed implementation that will have the capability of detecting both the instantaneous and chronicle loss in real time.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB088
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPVA082	PLASMA PROCESSING R&D OF THE 1.3 GHZ SINGLE-CELL SRF CAVITY AT IMP	1055
SUSPSIK101	use link to see paper's listing under its alternate paper code
	L. Yang, L. Chen, Y. He, S.C. Huang, C.X. Li, C.L. Li, Y.M. Li, L. Lu, A. Shi, L.P. Sun, A.D. Wu, S.H. Zhang IMP/CAS, Lanzhou, People's Republic of China
	The China-Accelerator Driven Sub-critical System (C-ADS) injector II has already commissioned with a CW 1 mA and a pulsed 10 mA proton beam. The beam energy achieved 10 MeV. The superconducting linac (SCL) is routinely operating at 4.7 MV/m average accelerating gradient in the low-beta cryomodules. Field emission and surface contaminants of the SCL limit the gradient in-crease in the beam commissioning. Hence, in order to increase the SCL accelerating gradient, reduce field emis-sion and remove surface pollutants, in-situ plasma pro-cessing R&D in a 1.3 GHz single-cell SRF cavity has being studied. In this paper, the current effort of plasma processing R&D in a 1.3 GHz single-cell SRF cavity will be presented in details and the future plan will be also reported.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPVA082
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEXA1	High Intensity RFQs: Review on Recent Developments, Common Problems, Solutions
	Y. He IMP/CAS, Lanzhou, People's Republic of China
	All new hadron linear accelerators have as a first element an RFQ (radio frequency quadrupole), where the beam characteristics (longitudinal and transverse) are formed in the most critical space charge conditions. In many cases also a high duty cycle is required, hence the tight geometrical tolerances dictated by beam dynamics need to be kept in the presence of high power density. It is widely recognized that this component of the accelerator is fundamental, and deserves investments in terms of beam dynamics, electromagnetics and mechanical engineering studies. New results from the various RFQÂ’s worldwide will be reported (those for IFMIF, SPIRAL2, SNS, FRANZ, Chinese ADS, and others), with emphasis on developments, common problems, solutions adopted.
	Slides WEXA1 [12.741 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

A Differential Beam Intensity Monitoring for the CIADS LINAC

325

Z.P. Xie
Hohai University, Nanjing, People's Republic of China
Y. He, R. Huang, Z.J. Wang
IMP/CAS, Lanzhou, People's Republic of China

Funding: Work supported by the National Natural Science Foundation of China (Grant No. 91026001) and the Fundamental Research Funds for the Chinese Central Universities
The high power Linac places many crucial requirements on the beam diagnostics for the China initiative accelerator driven subcritical(CIADS) facility. Measuring the beam loss is essential for the purpose of machine protections for the facility. A beam position pickup based differential beam current monitoring (BPDBCM) scheme has been proposed for the MEBT section at CIADS. Discussions of the principles for the scheme and the realtionship between beam intensity measurement and the pulse length are presented. Simulations are performed and they demonstrate that the proposed system can be effective at the low enery section for the CIADS beam. This paper describes the proposed implementation that will have the capability of detecting both the instantaneous and chronicle loss in real time.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB088

Export •

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

MOPVA082

PLASMA PROCESSING R&D OF THE 1.3 GHZ SINGLE-CELL SRF CAVITY AT IMP

1055

SUSPSIK101

use link to see paper's listing under its alternate paper code

L. Yang, L. Chen, Y. He, S.C. Huang, C.X. Li, C.L. Li, Y.M. Li, L. Lu, A. Shi, L.P. Sun, A.D. Wu, S.H. Zhang
IMP/CAS, Lanzhou, People's Republic of China

The China-Accelerator Driven Sub-critical System (C-ADS) injector II has already commissioned with a CW 1 mA and a pulsed 10 mA proton beam. The beam energy achieved 10 MeV. The superconducting linac (SCL) is routinely operating at 4.7 MV/m average accelerating gradient in the low-beta cryomodules. Field emission and surface contaminants of the SCL limit the gradient in-crease in the beam commissioning. Hence, in order to increase the SCL accelerating gradient, reduce field emis-sion and remove surface pollutants, in-situ plasma pro-cessing R&D in a 1.3 GHz single-cell SRF cavity has being studied. In this paper, the current effort of plasma processing R&D in a 1.3 GHz single-cell SRF cavity will be presented in details and the future plan will be also reported.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPVA082

Export •

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

WEXA1

High Intensity RFQs: Review on Recent Developments, Common Problems, Solutions

Y. He
IMP/CAS, Lanzhou, People's Republic of China

All new hadron linear accelerators have as a first element an RFQ (radio frequency quadrupole), where the beam characteristics (longitudinal and transverse) are formed in the most critical space charge conditions. In many cases also a high duty cycle is required, hence the tight geometrical tolerances dictated by beam dynamics need to be kept in the presence of high power density. It is widely recognized that this component of the accelerator is fundamental, and deserves investments in terms of beam dynamics, electromagnetics and mechanical engineering studies. New results from the various RFQÂ’s worldwide will be reported (those for IFMIF, SPIRAL2, SNS, FRANZ, Chinese ADS, and others), with emphasis on developments, common problems, solutions adopted.

Slides WEXA1 [12.741 MB]

Export •

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