MEDSI2023 - List of Authors (Chen, Y.)

Paper	Title	Page
TUPYP050	Design and Calculation of Vacuum System for WALS Storage Ring	105
	C.Y. Liu, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, J. Li, Y. Nie, J. Wang, Y. Wang, G. Wei, P. Xiang, Y. Xu, J.M. Zhang, Y.X. Zhang, Y. Zou IAS, Wuhan City, People’s Republic of China
	Funding: * Work supported by the Key R&D Project of Hubei Provincial Department of Science and Technology, No. 2021AFB001. Wuhan Advanced Light Source (WALS) is a fourth-generation synchrotron radiation facility with 1.5 GeV designed energy and 500 mA beam current. The storage ring vacuum system has to be designed in such a way which is compatible with a multi-bend achromat (MBA) compact lattice. the new technology of non-evaporable getter (NEG) coating was used, which is more and more popular in accelerator equipment. The design of the whole vacuum chamber and the nec-essary calculations were posted in the paper. The results indicated that the design of the vacuum system can meet the design requirement.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP050
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 15 November 2023 — Issued ※ 18 July 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPYP051	Progress of WALS NEG Coating Equipment and Technology	108
	G. Wei, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, J. Li, C.Y. Liu, Y. Nie, J. Wang, Y. Wang, P. Xiang, Y. Xu, J.M. Zhang, Y.X. Zhang, Y. Zou IAS, Wuhan City, People’s Republic of China
	The goal of WALS (Wuhan Advanced Light Source) is to build a world -class radiating light source. Chromium-zirconium-copper was chosen as the main material for the entire storage ring vacuum vessels. And magnetron sputtering (PVD) process was used to deposit NEG coating on the inner surface of copper vacuum chamber, which can further improve the performance of the vacuum. At present, the coating laboratory has taken shape as a whole, and has built a standard cleaning platform, coating platform, ultimate vacuum test platform, extraction rate test platform, coating microstructure test process. As for the coating equipment, bias power supply and custom ceramic parts are added to achieve more functions. Different target materials were controlled by multi-electrode control, while experiments were performed on deposited compositions of different ratios of multilayers; Sample tube bias control access during the coating process; Multiple combinations of target materials and bias parameters for the technique have been studied. Coating is currently underway, and specific test results are in progress.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP051
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 15 November 2023 — Issued ※ 18 July 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP046	The Pumping Properties of Ti-Zr-V Non-Evaporable Getter Film Coated Vacuum Chambers
	J. Li, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, C.Y. Liu, Y. Nie, J. Wang, Y. Wang, G. Wei, P. Xiang, J.M. Zhang, Y.X. Zhang, Y. Zou IAS, Wuhan City, People’s Republic of China
	Funding: Work supported by the Key R&D Project of Hubei Provincial Department of Science and Technology, No. 2021AFB001. Wuhan Advanced Light Source (WALS) is a fourth-generation synchrotron radiation facility with 1.5 GeV designed energy and 500 mA beam current. In order to meet specific requirements, most of the vacuum chambers for the WALS 1.5 GeV storage ring are small aperture tubes. To achieve the vacuum requirement, the technology of non-evaporable getter (NEG) films deposited on the inner wall of chambers to deal with the small aperture of vacuum chambers. In this paper, the ternary Ti-Zr-V getter film was deposited on the stainless-steel tubes by using a developed cylindrical magnetron sputtering system. Microstructure characterizations were obtained by scanning electron microscopy. The pumping property for H₂ and CO of the films with different surface morphologies (dense and columnar) activated at various temperature were tested by the pumping property evaluate facility. The result in this paper indicated that the columnar films have a better pumping performance compared with the dense films. With the number of activations increases, the pumping performance decreases. To achieve the same pumping performance, the increase of the activation temperature or activation time is needed.
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Paper

Title

Page

Design and Calculation of Vacuum System for WALS Storage Ring

105

C.Y. Liu, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, J. Li, Y. Nie, J. Wang, Y. Wang, G. Wei, P. Xiang, Y. Xu, J.M. Zhang, Y.X. Zhang, Y. Zou
IAS, Wuhan City, People’s Republic of China

Funding: * Work supported by the Key R&D Project of Hubei Provincial Department of Science and Technology, No. 2021AFB001.
Wuhan Advanced Light Source (WALS) is a fourth-generation synchrotron radiation facility with 1.5 GeV designed energy and 500 mA beam current. The storage ring vacuum system has to be designed in such a way which is compatible with a multi-bend achromat (MBA) compact lattice. the new technology of non-evaporable getter (NEG) coating was used, which is more and more popular in accelerator equipment. The design of the whole vacuum chamber and the nec-essary calculations were posted in the paper. The results indicated that the design of the vacuum system can meet the design requirement.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP050

About •

Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 15 November 2023 — Issued ※ 18 July 2024

Cite •

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

TUPYP051

Progress of WALS NEG Coating Equipment and Technology

108

G. Wei, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, J. Li, C.Y. Liu, Y. Nie, J. Wang, Y. Wang, P. Xiang, Y. Xu, J.M. Zhang, Y.X. Zhang, Y. Zou
IAS, Wuhan City, People’s Republic of China

The goal of WALS (Wuhan Advanced Light Source) is to build a world -class radiating light source. Chromium-zirconium-copper was chosen as the main material for the entire storage ring vacuum vessels. And magnetron sputtering (PVD) process was used to deposit NEG coating on the inner surface of copper vacuum chamber, which can further improve the performance of the vacuum. At present, the coating laboratory has taken shape as a whole, and has built a standard cleaning platform, coating platform, ultimate vacuum test platform, extraction rate test platform, coating microstructure test process. As for the coating equipment, bias power supply and custom ceramic parts are added to achieve more functions. Different target materials were controlled by multi-electrode control, while experiments were performed on deposited compositions of different ratios of multilayers; Sample tube bias control access during the coating process; Multiple combinations of target materials and bias parameters for the technique have been studied. Coating is currently underway, and specific test results are in progress.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP051

About •

Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 15 November 2023 — Issued ※ 18 July 2024

Cite •

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

WEPPP046

The Pumping Properties of Ti-Zr-V Non-Evaporable Getter Film Coated Vacuum Chambers

J. Li, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, C.Y. Liu, Y. Nie, J. Wang, Y. Wang, G. Wei, P. Xiang, J.M. Zhang, Y.X. Zhang, Y. Zou
IAS, Wuhan City, People’s Republic of China

Funding: Work supported by the Key R&D Project of Hubei Provincial Department of Science and Technology, No. 2021AFB001.
Wuhan Advanced Light Source (WALS) is a fourth-generation synchrotron radiation facility with 1.5 GeV designed energy and 500 mA beam current. In order to meet specific requirements, most of the vacuum chambers for the WALS 1.5 GeV storage ring are small aperture tubes. To achieve the vacuum requirement, the technology of non-evaporable getter (NEG) films deposited on the inner wall of chambers to deal with the small aperture of vacuum chambers. In this paper, the ternary Ti-Zr-V getter film was deposited on the stainless-steel tubes by using a developed cylindrical magnetron sputtering system. Microstructure characterizations were obtained by scanning electron microscopy. The pumping property for H₂ and CO of the films with different surface morphologies (dense and columnar) activated at various temperature were tested by the pumping property evaluate facility. The result in this paper indicated that the columnar films have a better pumping performance compared with the dense films. With the number of activations increases, the pumping performance decreases. To achieve the same pumping performance, the increase of the activation temperature or activation time is needed.

Cite •

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