IPAC2017 - List of Authors (Dong, L.)

Paper	Title	Page
TUPIK067	Online Monitoring of the ADS Test Cryostat Cold Mass With WPM	1848
	H.Y. Zhu Institute of High Energy Physics (IHEP), People's Republic of China L. Dong, L.L. Men, Z. Wang IHEP, Beijing, People's Republic of China B. Li CSNS, Guangdong Province, People's Republic of China
	Superconducting devices in particle accelerator demand strict operating environment: cryostat with ultra high vacuum and almost absolute zero temperature 2K-4K. This brings a big problem to survey and alignment work: how to preserve the magnets alignment precision in the cryostat, especially after such a big range temperature change. The complicate structure of magnet girder and cryogenic pipes make it difficult to do precise contraction simulation. So wire position monitor (WPM) is designed to measure the device contraction in cryomodule. Accelerator Driven System (ADS) Injector-I is a proton Linac, WPM system was assembled in its first cyomodule TCM. WPM is precisely calibrated, assembled at the same height as magnets. System noise, contraction stability and repeatability are analyzed in detail. Contraction coefficient of girder system is calculated by contraction data and temperature data, the result matches with the thermal coefficient of stainless steel very well. After commissioning, two thermal cycles were recorded, average contraction value was 1.35mm. The commissioning data shows about 0.2mm contraction difference with the same girder structure.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK067
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WEPVA070	Alignment and Calibration for Collimation System in CSNS/RCS	3432
	J.B. Yu, L. Dong, L. Kang, B. Li, X.J. Nie, A.X. Wang, G.Y. Wang, X.L. Wang, J.S. Zhang IHEP, Beijing, People's Republic of China J.X. Chen, T. Luo, C.J. Ning CSNS, Guangdong Province, People's Republic of China
	Funding: National Natural Science Foundation of China (Grant Nos.11375217) In order to reduce the uncontrolled losses in the localized station, the beam collimation system has been performed for the 1.6GeV synchrotron of CSNS. The CSNS/RCS transverse collimation system is designed to be a two-stage system which consists of one primary collimator and four secondary collimators. All collimators had completed processing and now been installed in the tunnel. To meet the requirements of physical system, alignment for collimation system have to be done before circulating beams. This paper will show the alignment technique of collimation system. Then some problems during the alignment process will be mentioned. For the primary collimator will be replaced in second-stage of CSNS, and the alignment for the replaced collimator will be introduced finally.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA070
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Online Monitoring of the ADS Test Cryostat Cold Mass With WPM

1848

H.Y. Zhu
Institute of High Energy Physics (IHEP), People's Republic of China
L. Dong, L.L. Men, Z. Wang
IHEP, Beijing, People's Republic of China
B. Li
CSNS, Guangdong Province, People's Republic of China

Superconducting devices in particle accelerator demand strict operating environment: cryostat with ultra high vacuum and almost absolute zero temperature 2K-4K. This brings a big problem to survey and alignment work: how to preserve the magnets alignment precision in the cryostat, especially after such a big range temperature change. The complicate structure of magnet girder and cryogenic pipes make it difficult to do precise contraction simulation. So wire position monitor (WPM) is designed to measure the device contraction in cryomodule. Accelerator Driven System (ADS) Injector-I is a proton Linac, WPM system was assembled in its first cyomodule TCM. WPM is precisely calibrated, assembled at the same height as magnets. System noise, contraction stability and repeatability are analyzed in detail. Contraction coefficient of girder system is calculated by contraction data and temperature data, the result matches with the thermal coefficient of stainless steel very well. After commissioning, two thermal cycles were recorded, average contraction value was 1.35mm. The commissioning data shows about 0.2mm contraction difference with the same girder structure.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK067

Export •

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

WEPVA070

Alignment and Calibration for Collimation System in CSNS/RCS

3432

J.B. Yu, L. Dong, L. Kang, B. Li, X.J. Nie, A.X. Wang, G.Y. Wang, X.L. Wang, J.S. Zhang
IHEP, Beijing, People's Republic of China
J.X. Chen, T. Luo, C.J. Ning
CSNS, Guangdong Province, People's Republic of China

Funding: National Natural Science Foundation of China (Grant Nos.11375217)
In order to reduce the uncontrolled losses in the localized station, the beam collimation system has been performed for the 1.6GeV synchrotron of CSNS. The CSNS/RCS transverse collimation system is designed to be a two-stage system which consists of one primary collimator and four secondary collimators. All collimators had completed processing and now been installed in the tunnel. To meet the requirements of physical system, alignment for collimation system have to be done before circulating beams. This paper will show the alignment technique of collimation system. Then some problems during the alignment process will be mentioned. For the primary collimator will be replaced in second-stage of CSNS, and the alignment for the replaced collimator will be introduced finally.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA070

Export •

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