MEDSI2023 - List of Authors (Dong, H.)

Paper	Title	Page
THPPP047	NEG Film Development and Massive Coating production for HEPS	343
	Y.S. Ma, H. Dong, D.Z. Guo, P. He, F. Sun, Y.C. Yang IHEP, People’s Republic of China T. Huang IHEP CSNS, Guangdong Province, People’s Republic of China
	Massive production facilities of NEG coated vacuum chambers have been developed for HEPS in Huairou, Beijing, which based on the NEG coating prototypes of HEPS-TF. The facilities can achieve simultaneous coating of 16~20 vacuum chambers of HEPS including irregular shaped vacuum chambers. The pumping per-formance of the NEG coated vacuum chambers has been measured by test facilities. After heating at 200°C for 24 hours, the highest pumping speed of H₂ is about 0.65 l/scm², and the highest capacity of CO is about 1.89×10^-5 mbar·L/cm². The lifetime is more than 20 cycles of air exposure and re-activation. The pumping performance meets the design requirements of HEPS. Currently the NEG coated vacuum chambers are applied to the storage ring of HEPS.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP047
About •	Received ※ 02 November 2023 — Revised ※ 09 November 2023 — Accepted ※ 22 November 2023 — Issued ※ 18 July 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPPP052	Design and Development of Coated Chamber for In-Air Insertion Devices	352
	P.C. Wang, Y. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China H. Dong, Y.S. Ma, Y.G. Wang, L. Zhang IHEP, Beijing, People’s Republic of China J.M. Liu, S.M. Liu, X.Y. Sun DNSC, Dongguan, People’s Republic of China B. Tan Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China B.L. Zhu IHEP CSNS, Guangdong Province, People’s Republic of China
	The insertion devices ¿ID¿is an important guarantee for further improving the performance of the light source to meet the needs of different users. For in-air ID (undulator, wiggler, etc.), the magnetic structure is in the air, and the vacuum chamber is in the middle of the magnetic structure to ensure the normal operation of the beam. In order to increase the magnetic field strength, the magnetic gap is generally relatively small. Factors such as small setting space, high precision, and low conductance all pose challenges to the design and processing of vacuum chamber. This paper introduces the development process of the vacuum chamber prototype of the coating type ID for the China ’s first diffraction-limited light source HEPS. The simultaneous analysis and vacuum pressure distribution calculation of the ID are carried out, and the NEG coating scheme is proposed as an more economical means to obtain ultra-high vacuum. The prototype NEG coating progress is introduced.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP052
About •	Received ※ 02 November 2023 — Revised ※ 10 November 2023 — Accepted ※ 12 November 2023 — Issued ※ 18 July 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

NEG Film Development and Massive Coating production for HEPS

343

Y.S. Ma, H. Dong, D.Z. Guo, P. He, F. Sun, Y.C. Yang
IHEP, People’s Republic of China
T. Huang
IHEP CSNS, Guangdong Province, People’s Republic of China

Massive production facilities of NEG coated vacuum chambers have been developed for HEPS in Huairou, Beijing, which based on the NEG coating prototypes of HEPS-TF. The facilities can achieve simultaneous coating of 16~20 vacuum chambers of HEPS including irregular shaped vacuum chambers. The pumping per-formance of the NEG coated vacuum chambers has been measured by test facilities. After heating at 200°C for 24 hours, the highest pumping speed of H₂ is about 0.65 l/scm², and the highest capacity of CO is about 1.89×10^-5 mbar·L/cm². The lifetime is more than 20 cycles of air exposure and re-activation. The pumping performance meets the design requirements of HEPS. Currently the NEG coated vacuum chambers are applied to the storage ring of HEPS.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP047

About •

Received ※ 02 November 2023 — Revised ※ 09 November 2023 — Accepted ※ 22 November 2023 — Issued ※ 18 July 2024

Cite •

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

THPPP052

Design and Development of Coated Chamber for In-Air Insertion Devices

352

P.C. Wang, Y. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China
H. Dong, Y.S. Ma, Y.G. Wang, L. Zhang
IHEP, Beijing, People’s Republic of China
J.M. Liu, S.M. Liu, X.Y. Sun
DNSC, Dongguan, People’s Republic of China
B. Tan
Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China
B.L. Zhu
IHEP CSNS, Guangdong Province, People’s Republic of China

The insertion devices ¿ID¿is an important guarantee for further improving the performance of the light source to meet the needs of different users. For in-air ID (undulator, wiggler, etc.), the magnetic structure is in the air, and the vacuum chamber is in the middle of the magnetic structure to ensure the normal operation of the beam. In order to increase the magnetic field strength, the magnetic gap is generally relatively small. Factors such as small setting space, high precision, and low conductance all pose challenges to the design and processing of vacuum chamber. This paper introduces the development process of the vacuum chamber prototype of the coating type ID for the China ’s first diffraction-limited light source HEPS. The simultaneous analysis and vacuum pressure distribution calculation of the ID are carried out, and the NEG coating scheme is proposed as an more economical means to obtain ultra-high vacuum. The prototype NEG coating progress is introduced.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP052

About •

Received ※ 02 November 2023 — Revised ※ 10 November 2023 — Accepted ※ 12 November 2023 — Issued ※ 18 July 2024

Cite •

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