MEDSI2023 - List of Authors (Liu, L.)

Paper	Title	Page
THPPP028	Design and Analysis of CSNS-II Primary Stripper Foil	319
	J.X. Chen, Y.J. Yu, J.S. Zhang IHEP CSNS, Guangdong Province, People’s Republic of China L. Kang, L. Liu, G.Y. Wang, J.B. Yu, J.Y. Zhang IHEP, People’s Republic of China
	Funding: National Natural Science Foundation of China, 11975253 Stripper foil is a key equipment for converting negative hydrogen ions into protons in the RCS injection zone of CSNS. The structure of the CSNS primary stripper foil adopts a rotating steel strip structure, and the replacement time of the foil is long, requiring operators to carry out maintenance work in close proximity for a long time. The energy of CSNS-II injection beam has significantly increased from 80MeV to 300MeV, and the radiation dose in the injection area will also increase, making it impossible to maintain the equipment in close proximity for a long time. Therefore, it is necessary to redesign the primary stripper foil. This article will analyze the stripper efficiency and beam injection thermodynamics of CSNS-II stripper foil, carry out automatic foil store replacement structure design, motion analysis, and prototype testing, and envision remote maintenance solutions to achieve maintenance and repair of the stripper foil with minimal human intervention.
	Poster THPPP028 [3.748 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP028
About •	Received ※ 31 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 04 March 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPPP005	Development of a Vacuum Chamber Disassembly and Assembly Handcart	277
	X.J. Nie, J.X. Chen, H.Y. He, L. Liu, R.H. Liu, C.J. Ning, G.Y. Wang, J.B. Yu, Y.J. Yu, J.S. Zhang IHEP CSNS, Guangdong Province, People’s Republic of China L. Kang IHEP, Beijing, People’s Republic of China
	This paper developed a dedicated disassembly and assembly handcart for CSNS magnetic alloy cavity vacuum chamber. The optimal supporting section structure was determined by the use of ANSYS to analyze the strength of different sections. The stress situation of the handcart was improved by adding an extension rod at the end of the handcart. The installation position of the handcart was determined by the center position of the associated equipment. The development of the disassembly and assembly handcart structure was completed through structural optimization, disassembly and assembly process analysis, and positioning scheme design. The development of a handcart can improve the positioning accuracy of the vacuum chamber and prevent damage to the vacuum chamber during disassembly and assembly process.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP005
About •	Received ※ 24 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 18 November 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPPP029	Technologies Concerning Metal Seals of the UHV System for Accelerators	322
	H.Y. He, Y.S. Ma IHEP, Beijing, People’s Republic of China L. Liu, P.C. Wang IHEP CSNS, Guangdong Province, People’s Republic of China B. Tan Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China
	Reviewed the domestic research on structural design and sealing function principle of the metal seals, wildly used in the Ultra High Vacuum (UHV) system for accelerators. Analyzed and summarized the key technologies concerning the material, contact forms, machining process and test methods of sealing performance. The study will become the basis of designing, machining and quality measuring for the ultra-vacuum metal seals. It provided the foundation for generating seals standards to promote the development of vacuum technology application.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP029
About •	Received ※ 27 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 26 November 2023
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THPPP034	Research on the Identification Method of Micro-Vibration Harmonic Signal Based on Kurtosis
	R.H. Liu, G.Y. Wang Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China L. Kang IHEP, Beijing, People’s Republic of China L. Liu, J.S. Zhang IHEP CSNS, Guangdong Province, People’s Republic of China
	Large synchrotron radiation equipment works in complex microvibration environment which includes random vibration and periodic harmonic vibration signals. The harmonic signal will affect the identification of the working mode of the structure, and the identification of the harmonic signal can be used as the identification of the micro-vibration source. In this paper, according to the difference between the statistical characteristics of the system response and the harmonic response, a kurtosis value method based on random variable is applied to identify the harmonic response. The effectiveness of the method is verified by the simulation and the vibration data results of Shenzhen Sager Tower, which provides a new method for eliminating the influence of harmonic response in the following working modal parameter identification and vibration source identification of synchrotron radiation device. Microvibration, Kurtosis value, Harmonic excitation, Modal parameter identification
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Paper

Title

Page

Design and Analysis of CSNS-II Primary Stripper Foil

319

J.X. Chen, Y.J. Yu, J.S. Zhang
IHEP CSNS, Guangdong Province, People’s Republic of China
L. Kang, L. Liu, G.Y. Wang, J.B. Yu, J.Y. Zhang
IHEP, People’s Republic of China

Funding: National Natural Science Foundation of China, 11975253
Stripper foil is a key equipment for converting negative hydrogen ions into protons in the RCS injection zone of CSNS. The structure of the CSNS primary stripper foil adopts a rotating steel strip structure, and the replacement time of the foil is long, requiring operators to carry out maintenance work in close proximity for a long time. The energy of CSNS-II injection beam has significantly increased from 80MeV to 300MeV, and the radiation dose in the injection area will also increase, making it impossible to maintain the equipment in close proximity for a long time. Therefore, it is necessary to redesign the primary stripper foil. This article will analyze the stripper efficiency and beam injection thermodynamics of CSNS-II stripper foil, carry out automatic foil store replacement structure design, motion analysis, and prototype testing, and envision remote maintenance solutions to achieve maintenance and repair of the stripper foil with minimal human intervention.

Poster THPPP028 [3.748 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP028

About •

Received ※ 31 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 04 March 2024

Cite •

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

THPPP005

Development of a Vacuum Chamber Disassembly and Assembly Handcart

277

X.J. Nie, J.X. Chen, H.Y. He, L. Liu, R.H. Liu, C.J. Ning, G.Y. Wang, J.B. Yu, Y.J. Yu, J.S. Zhang
IHEP CSNS, Guangdong Province, People’s Republic of China
L. Kang
IHEP, Beijing, People’s Republic of China

This paper developed a dedicated disassembly and assembly handcart for CSNS magnetic alloy cavity vacuum chamber. The optimal supporting section structure was determined by the use of ANSYS to analyze the strength of different sections. The stress situation of the handcart was improved by adding an extension rod at the end of the handcart. The installation position of the handcart was determined by the center position of the associated equipment. The development of the disassembly and assembly handcart structure was completed through structural optimization, disassembly and assembly process analysis, and positioning scheme design. The development of a handcart can improve the positioning accuracy of the vacuum chamber and prevent damage to the vacuum chamber during disassembly and assembly process.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP005

About •

Received ※ 24 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 18 November 2023

Cite •

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

THPPP029

Technologies Concerning Metal Seals of the UHV System for Accelerators

322

H.Y. He, Y.S. Ma
IHEP, Beijing, People’s Republic of China
L. Liu, P.C. Wang
IHEP CSNS, Guangdong Province, People’s Republic of China
B. Tan
Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China

Reviewed the domestic research on structural design and sealing function principle of the metal seals, wildly used in the Ultra High Vacuum (UHV) system for accelerators. Analyzed and summarized the key technologies concerning the material, contact forms, machining process and test methods of sealing performance. The study will become the basis of designing, machining and quality measuring for the ultra-vacuum metal seals. It provided the foundation for generating seals standards to promote the development of vacuum technology application.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP029

About •

Received ※ 27 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 26 November 2023

Cite •

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

THPPP034

Research on the Identification Method of Micro-Vibration Harmonic Signal Based on Kurtosis

R.H. Liu, G.Y. Wang
Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China
L. Kang
IHEP, Beijing, People’s Republic of China
L. Liu, J.S. Zhang
IHEP CSNS, Guangdong Province, People’s Republic of China

Large synchrotron radiation equipment works in complex microvibration environment which includes random vibration and periodic harmonic vibration signals. The harmonic signal will affect the identification of the working mode of the structure, and the identification of the harmonic signal can be used as the identification of the micro-vibration source. In this paper, according to the difference between the statistical characteristics of the system response and the harmonic response, a kurtosis value method based on random variable is applied to identify the harmonic response. The effectiveness of the method is verified by the simulation and the vibration data results of Shenzhen Sager Tower, which provides a new method for eliminating the influence of harmonic response in the following working modal parameter identification and vibration source identification of synchrotron radiation device.
Microvibration, Kurtosis value, Harmonic excitation, Modal parameter identification

Cite •

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