MEDSI2023 - List of Authors (Wang, S.F.)

Paper	Title	Page
TUOAM05	Thermal-Deformation-Based X-Ray Active Optics Development in IHEP	10
	F.G. Yang, D.Z. Diao, H. Dong, J. Han, M. Li, W.F. Sheng, S.F. Wang, X.W. Zhang IHEP, Beijing, People’s Republic of China L. Kang IHEP CSNS, Guangdong Province, People’s Republic of China
	Funding: National Natural Science Foundation of China (11505212, 11875059); Youth Innovation Promotion Association of the Chinese Academy of Sciences (2019012). Advanced light source require small wavefront distortion to maintain the quality of the X-ray beam. Active optical wavefront correction technology is a very important solution to solve the service problems of ultra-precise devices under such conditions. In this paper, we will report our recent progress on this active optics system development including surface metrology and mirror modulation. Based on the research of laser-heating-based thermal deformation modulation technology, this project proposes to modify the mirror surface of X-ray mirrors based on semiconductor microfabrication process, and modulate the local deformation of the mirror surface by electric heating to realize the surface shape correction /modulation of X-ray mirrors. Since the modulation unit acts directly on the reflective region of the mirror surface, it has a better surface shape correction capability than the conventional body deformation modulation. The solution also has the advantage of high efficiency and low cost. *Yang F, Li M, Gao L, et al. Laser-heating-based active optics for synchrotron radiation applications[J]. Optics Letters, 2016, 41(12): 2815-2818.
	Slides TUOAM05 [18.205 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOAM05
About •	Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 01 February 2024
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TUPYP013	Highly Efficient Thermal Deformation Optimization Method for Smart-Cut Mirrors over the Entire Photon Energy Range
	S.F. Wang IHEP, Beijing, People’s Republic of China
	Funding: X-ray Mirror Innovation Cross Team, Chinese Academy of Sciences, (JCTD-2020-02) Measure and Study of Synchrotron Radiation Optical Components In Situ Environment, IHEP, 2019. For heat load generated by synchrotron radiation, it is a challenge to optimize the thermal deformation of the mirror over the entire photon energy range. A theoretical method is used to quantitatively evaluate the influence of the thermal load on the thermal deformation of the mirror. The result of theoretical calculations and finite element analysis (FEA) are consistent, which proves the feasibility of the method. The thermal deformation optimization theory proposed in this paper requires only one round optimization calculation and check computation in FEA. Significantly reduce the workload of mirror design. And the design work has taken care of all the photon energy points. Avoid optimizing mirrors at a certain energy point, resulting in large deformations at other energy points. In addition, designers can predict the thermal deformation of the mirror at a certain energy point without FEA simulation. This will provide guidance for the correction of the spherical item of the WBM’s thermal deformation by downstream optics, such as focusing mirror, compound refractive lens (CRL) and so on.
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THOBM03	Progress and Core Technologies Development of Monochromators for HEPS
	H. Liang, M.W. Chen, X.B. Deng, Q.S. Diao, L. Gao, Z. Hong, G. Li, M. Li, Z.K. Liu, Y.S. Lu, D.S. Shen, W.F. Sheng, S.F. Wang, Y. Yang, Z.Y. Yue, L. Zhang, S. Zhang, Y.S. Zhang, A.Y. Zhou IHEP, Beijing, People’s Republic of China
	HEPS is the first low emittance 4th generation light source in China, as monochromators are often limiting the performance of beamlines, many challenges are faced to preserve the quality of the beam. In order to meet the stringent and versatile requirements of 12 in house developed monochromators for different beamlines, several core technologies have been studied and developed. Stability considerations, vibration measurement system and methods are introduced, stability below 10 nrad RMS are measured for operation conditions by laser interferometers. Thermal resistance study at low temperature was carried out, enabling more accurate FEA of cooling. Clamping deformation of crystals at low temperature are experimentally studied, slope errors below 0.1 microradian RMS are measured. Design and test results on different types of monochromators will also be presented. Results show that the in house developed monochromators are able to meet the requirements of HEPS beamlines.
	Slides THOBM03 [8.445 MB]
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Paper

Title

Page

Thermal-Deformation-Based X-Ray Active Optics Development in IHEP

10

F.G. Yang, D.Z. Diao, H. Dong, J. Han, M. Li, W.F. Sheng, S.F. Wang, X.W. Zhang
IHEP, Beijing, People’s Republic of China
L. Kang
IHEP CSNS, Guangdong Province, People’s Republic of China

Funding: National Natural Science Foundation of China (11505212, 11875059); Youth Innovation Promotion Association of the Chinese Academy of Sciences (2019012).
Advanced light source require small wavefront distortion to maintain the quality of the X-ray beam. Active optical wavefront correction technology is a very important solution to solve the service problems of ultra-precise devices under such conditions. In this paper, we will report our recent progress on this active optics system development including surface metrology and mirror modulation. Based on the research of laser-heating-based thermal deformation modulation technology, this project proposes to modify the mirror surface of X-ray mirrors based on semiconductor microfabrication process, and modulate the local deformation of the mirror surface by electric heating to realize the surface shape correction /modulation of X-ray mirrors. Since the modulation unit acts directly on the reflective region of the mirror surface, it has a better surface shape correction capability than the conventional body deformation modulation. The solution also has the advantage of high efficiency and low cost.
*Yang F, Li M, Gao L, et al. Laser-heating-based active optics for synchrotron radiation applications[J]. Optics Letters, 2016, 41(12): 2815-2818.

Slides TUOAM05 [18.205 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOAM05

About •

Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 01 February 2024

Cite •

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

TUPYP013

Highly Efficient Thermal Deformation Optimization Method for Smart-Cut Mirrors over the Entire Photon Energy Range

S.F. Wang
IHEP, Beijing, People’s Republic of China

Funding: X-ray Mirror Innovation Cross Team, Chinese Academy of Sciences, (JCTD-2020-02) Measure and Study of Synchrotron Radiation Optical Components In Situ Environment, IHEP, 2019.
For heat load generated by synchrotron radiation, it is a challenge to optimize the thermal deformation of the mirror over the entire photon energy range. A theoretical method is used to quantitatively evaluate the influence of the thermal load on the thermal deformation of the mirror. The result of theoretical calculations and finite element analysis (FEA) are consistent, which proves the feasibility of the method. The thermal deformation optimization theory proposed in this paper requires only one round optimization calculation and check computation in FEA. Significantly reduce the workload of mirror design. And the design work has taken care of all the photon energy points. Avoid optimizing mirrors at a certain energy point, resulting in large deformations at other energy points. In addition, designers can predict the thermal deformation of the mirror at a certain energy point without FEA simulation. This will provide guidance for the correction of the spherical item of the WBM’s thermal deformation by downstream optics, such as focusing mirror, compound refractive lens (CRL) and so on.

Cite •

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

THOBM03

Progress and Core Technologies Development of Monochromators for HEPS

H. Liang, M.W. Chen, X.B. Deng, Q.S. Diao, L. Gao, Z. Hong, G. Li, M. Li, Z.K. Liu, Y.S. Lu, D.S. Shen, W.F. Sheng, S.F. Wang, Y. Yang, Z.Y. Yue, L. Zhang, S. Zhang, Y.S. Zhang, A.Y. Zhou
IHEP, Beijing, People’s Republic of China

HEPS is the first low emittance 4th generation light source in China, as monochromators are often limiting the performance of beamlines, many challenges are faced to preserve the quality of the beam. In order to meet the stringent and versatile requirements of 12 in house developed monochromators for different beamlines, several core technologies have been studied and developed. Stability considerations, vibration measurement system and methods are introduced, stability below 10 nrad RMS are measured for operation conditions by laser interferometers. Thermal resistance study at low temperature was carried out, enabling more accurate FEA of cooling. Clamping deformation of crystals at low temperature are experimentally studied, slope errors below 0.1 microradian RMS are measured. Design and test results on different types of monochromators will also be presented. Results show that the in house developed monochromators are able to meet the requirements of HEPS beamlines.

Slides THOBM03 [8.445 MB]

Cite •

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