MEDSI2023 - List of Authors (Tian, Y.)

Paper	Title	Page
TUPYP042	Vacuum System Design of HEPS Beamlines
	Y. Tian, Q. Han, H. Shi IHEP, Beijing, People’s Republic of China
	Vacuum system is the basic component in High Energy Photon Source(HEPS) beamlines. Only when the optical devices in beamlines are operated in a high vacuum or even ultra-high vacuum environment, can avoid the carbon deposition of the optical mirror which might result in the optical reflectivity reduction, and reduce the absorption of synchrotron radiation light by residual gas. The purpose of vacuum system design is to obtain and maintain a reasonable vacuum degree to ensure the stable operation of the beamline. This article introduces the vacuum system design in HEPS beamlines from the aspects of pressure distribution calculation, vacuum material selection, vacuum acquisition, measurement equipment selection, vacuum system gas desorption analysis and vacuum equipment layout. The key point lies in using Mlflow software based on test particle Monte Carlo method to analyze and simulate the static pressure distribution which is without beam throughout the vacuum system and the dynamic pressure distribution after beam cleaning.
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WEPPP049	Designs of Multiple Experimental Models for Pink SAXS Station	226
	G. Mo, Z.J. Chen, Z.Q. Cui, Z.H. Li, Y.P. Liu, Y. Tian, Z.H. Wu, X. Xing IHEP, Bejing, People’s Republic of China
	Pink SAXS (small angle X-ray scattering) station is dedicated to performing scattering experiments. A classical planar undulator is adopted as the beam source. The pink beam from the fundamental radiation of the undulator at the range of 8-12keV will be used directly after reflected by a pure silicon reflector. The high flux pink beam will be used to perform high time-resolution SAXS experiments. Monochromatic beam, which is obtained by a normal horizontal monochromator, also can be used alternately to perform high energy resolution experiments. Monochromatic beam and pink beam can be switched through moving in and out of the monochromator. The scattering background is reduced effectively using three sets of scatterless slits. Three diamond compound refractive lenses with different curvatures are employed to focus the 12keV monochromatic beam at sample position, detector position and infinite position respectively. A totally 24 meters long vacuum detector tube is adopted as SAXS camera. Three vacuum compatibility EIGER detectors are equipped at different positions to collect WAXS, SAXS and USAXS signals respectively. Then simultaneous USAXS/SAXS/WAXS measurement could be performed.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP049
About •	Received ※ 01 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 01 July 2024
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Paper

Title

Page

TUPYP042

Vacuum System Design of HEPS Beamlines

Y. Tian, Q. Han, H. Shi
IHEP, Beijing, People’s Republic of China

Vacuum system is the basic component in High Energy Photon Source(HEPS) beamlines. Only when the optical devices in beamlines are operated in a high vacuum or even ultra-high vacuum environment, can avoid the carbon deposition of the optical mirror which might result in the optical reflectivity reduction, and reduce the absorption of synchrotron radiation light by residual gas. The purpose of vacuum system design is to obtain and maintain a reasonable vacuum degree to ensure the stable operation of the beamline. This article introduces the vacuum system design in HEPS beamlines from the aspects of pressure distribution calculation, vacuum material selection, vacuum acquisition, measurement equipment selection, vacuum system gas desorption analysis and vacuum equipment layout. The key point lies in using Mlflow software based on test particle Monte Carlo method to analyze and simulate the static pressure distribution which is without beam throughout the vacuum system and the dynamic pressure distribution after beam cleaning.

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

WEPPP049

Designs of Multiple Experimental Models for Pink SAXS Station

226

G. Mo, Z.J. Chen, Z.Q. Cui, Z.H. Li, Y.P. Liu, Y. Tian, Z.H. Wu, X. Xing
IHEP, Bejing, People’s Republic of China

Pink SAXS (small angle X-ray scattering) station is dedicated to performing scattering experiments. A classical planar undulator is adopted as the beam source. The pink beam from the fundamental radiation of the undulator at the range of 8-12keV will be used directly after reflected by a pure silicon reflector. The high flux pink beam will be used to perform high time-resolution SAXS experiments. Monochromatic beam, which is obtained by a normal horizontal monochromator, also can be used alternately to perform high energy resolution experiments. Monochromatic beam and pink beam can be switched through moving in and out of the monochromator. The scattering background is reduced effectively using three sets of scatterless slits. Three diamond compound refractive lenses with different curvatures are employed to focus the 12keV monochromatic beam at sample position, detector position and infinite position respectively. A totally 24 meters long vacuum detector tube is adopted as SAXS camera. Three vacuum compatibility EIGER detectors are equipped at different positions to collect WAXS, SAXS and USAXS signals respectively. Then simultaneous USAXS/SAXS/WAXS measurement could be performed.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP049

About •

Received ※ 01 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 01 July 2024

Cite •

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