MEDSI2023 - List of Authors (Liang, H.)

Paper	Title	Page
TUPYP016	Quick Scanning Verification of a Monochromator Spindle Based Servo Control at BSRF
	Z.K. Liu, H. Liang IHEP, Beijing, People’s Republic of China
	A quick scanning monochromator built for Quick EXAFS experiments needs to perform 2 kinds of movements, one is fast movements in an oscillation way of the spindle, the other is step scan mode. Servo control has never been used on quick scanning monochromators. To verify the feasibility of the 2 modes on quick scanning monochromators by servo control, experiments are designed and carried out on a inhouse built air bearing spindle. An ACS controller is used to drive the motor, encoder provides the position feedback. A laser interferometer is used to measure the actual angular position of the spindle. Test method: The motor is controlled to move with a set trajectory of sinusoidal signals, and the feedback data from the interferometer and encoder are compared to verify the position and speed. The experiments show that with interferometer calibration, there is only 3% systematic error in the encoder feedback value. Overall the stepping mode can achieve a resolution of 0.4 arcsecond per step, and the scanning mode can achieve a 50 Hz, 0.08°sine signal tracking. It is possible to get better results by using lighter loads and motors with better performance.
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TUPYP017	Design and Test of Precision Mechanics for High Energy Resolution Monochromator at the HEPS	51
	L. Zhang, H. Liang, Z.K. Liu, W. Xu, Y. Yang, Y.S. Zhang IHEP, Beijing, People’s Republic of China
	A monochromator stands as a typical representative of optical component within synchrotron radiation light sources. High resolution monochromators (HRMs), which incorporate precision positioning, stability control, and various other technologies, are a crucial subclass within this category. The next generation of photon sources imposes higher performance standards upon these HRMs. In this new design framework, the primary focus is on innovating precision motion components. Rigorous analysis and experimentation have confirmed the effectiveness of this design. This structural model provides valuable reference for developing other precision adjustment mechanisms within the realm of synchrotron radiation.
	Poster TUPYP017 [3.641 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP017
About •	Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 04 February 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPYP018	Design and Improvements of a Cryo-Cooled Horizontal Diffracting Double Crystal Monochromator for HEPS	55
	Y.S. Zhang, H. Liang, Y.S. Lu, D.S. Shen, L. Zhang IHEP, Beijing, People’s Republic of China
	Horizontal diffracting double crystal monochromator(HDCM) are usually used in a 4th generation light source beamline due to the larger source size in the horizontal direction. This paper introduces the mechanical design and optimization of a HDCM for Low-dimension Structure Probe Beamline of HEPS. In order to achieve the high stability requirement of 50nrad RMS, the structural design is optimized and modal improved through FEA. In order to meet the requirement of a total crystal slope error below 0.3¿rad, FEA optimizations of the clamping for first and second crystal are carried out. The vacuum chamber is optimized to become more compact, improving the maintainability. Fabrication of the HDCM is under way. The results show that the design is capable of guarantee the required surface slope error, stability, and adjustment requirements.
	Poster TUPYP018 [1.172 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP018
About •	Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 11 May 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP050	Quick scanning Channel-Cut crystal monochromator for millisecond time resolution EXAFS at HEPS	229
	Y.S. Lu, H. Liang, Z.K. Liu, D.S. Shen, Z. Sun, Y. Yang, S. Zhang, Y.S. Zhang IHEP, Beijing, People’s Republic of China
	The design and capabilities of a Quick scanning Channel-Cut monochromator (QCCM) for HEPS are presented. The quick scan and step scan are realized by a torque motor directly driven Bragg axis, controlled by a servo controller. This design allows easy and remote control of the oscillation frequency and angular range, providing comprehensive control of QXAFS measure-ments. The cryogenically cooled Si (311) and Si(111) crystals, which extends the energy range from 4.8 keV-45 keV. The dynamic analysis verifies the rationality of the mechanical structure design. The device was fabri-cated and tested, results show an oscillation frequency up to 50Hz with a range of 0.8°, and a resolution of 0.2 arcsecond in step scan mode. This device demonstrates the feasibility of large range quick scan and step scan by a single servo control system. Quick scanning Channel-Cut crystal monochromator
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP050
About •	Received ※ 02 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 January 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOAM04	Overall Progress on Development of X-ray Optics Mechanical Systems at High Energy Photon Source (HEPS)	252
	S. Tang, Y.H. Dong, X.H. Kuang, M. Li, H. Liang, R.Y. Liao, L.H. Ma, Z.N. Ou, H. Qian, Z.R. Ren, W.F. Sheng, J. Wang, R.Z. Xu, H.H. Yu IHEP, People’s Republic of China
	Funding: This work is supported by the project of High Energy Photon Source (HEPS). High Energy Photon Source (HEPS) regarded as a new 4th generation synchrotron radiation facility, is under construction in a virgin green field in Beijing, China. The X-ray optics/mirror mechanical systems (MMS) play an important role, which would be expected to be designed carefully and rigidly for the extremely stable performance requirement of HEPS. In addition, there are indeed big challenges due to so many types of mirror systems, such as white beam mirror (WBM), harmonic suppression mirror (HSM), combined deflecting mirror (CDM), bending mirror, Nano-KB, and the transfocator of Compound refractive lens (CRLs), etc. Therefore, overall progress on design and maunfacturing of the MMS is introduced, in which a promoting strategy and generic mirror mechanical system as a key technology is presented and developed for the project of HEPS. Furthermore, ultra-stable structucture, multi-DOF precision positioning, Eutectic Galium Indium (E-GaIn)-based vibration-decoupling watercooling, clamping, and bending have always been prior designs and considerations. Shanzhi Tang, Weifan Sheng, Jianye Wang, et al, Overall progress on the design of mirror mechanical systems at High Energy Photon Source (HEPS), SRI2021, Hamburg Germany, 2022. POSTER
	Slides THOAM04 [2.328 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM04
About •	Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 July 2024
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)

THPPP023	Design and Test of a New Crystal Assembly for a Double Crystal Monochromator	313
	Y. Yang, H. Liang, Z.K. Liu, Y.S. Lu, D.S. Shen, L. Zhang, S. Zhang, Y.S. Zhang IHEP, Beijing, People’s Republic of China
	Vertical diffraction monochromator is a typical optical device in synchrotron radiation device. Its main requirements and characteristics are high Angle accuracy and stability. Due to the high requirements of new light sources, high precision and high stability have become a common difficulty. This paper mainly introduces the design and test of an internal crystal module of HDCM. There are two main parts: the first crystal and the second crystal. The first crystal assembly includes crystal cooling and clamping, using microchannel edge cooling and flat plate clamping schemes. The second crystal component, through the motor to the top, drives the flexible hinge, and then realizes the rotation of the crystal. At the same time, the Angle monitoring system is designed. The design scheme is verified by processing. The shape of the clamping surface of a crystal component meets the requirements of use. The motion test of the two crystal components is carried out in the atmosphere, vacuum and low temperature vacuum environment, and the results are much higher than the required parameters. And the whole stability is tested. It has high stability.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP023
About •	Received ※ 02 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 19 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

TUPYP016

Quick Scanning Verification of a Monochromator Spindle Based Servo Control at BSRF

Z.K. Liu, H. Liang
IHEP, Beijing, People’s Republic of China

A quick scanning monochromator built for Quick EXAFS experiments needs to perform 2 kinds of movements, one is fast movements in an oscillation way of the spindle, the other is step scan mode. Servo control has never been used on quick scanning monochromators. To verify the feasibility of the 2 modes on quick scanning monochromators by servo control, experiments are designed and carried out on a inhouse built air bearing spindle. An ACS controller is used to drive the motor, encoder provides the position feedback. A laser interferometer is used to measure the actual angular position of the spindle. Test method: The motor is controlled to move with a set trajectory of sinusoidal signals, and the feedback data from the interferometer and encoder are compared to verify the position and speed. The experiments show that with interferometer calibration, there is only 3% systematic error in the encoder feedback value. Overall the stepping mode can achieve a resolution of 0.4 arcsecond per step, and the scanning mode can achieve a 50 Hz, 0.08°sine signal tracking. It is possible to get better results by using lighter loads and motors with better performance.

Cite •

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

TUPYP017

Design and Test of Precision Mechanics for High Energy Resolution Monochromator at the HEPS

51

L. Zhang, H. Liang, Z.K. Liu, W. Xu, Y. Yang, Y.S. Zhang
IHEP, Beijing, People’s Republic of China

A monochromator stands as a typical representative of optical component within synchrotron radiation light sources. High resolution monochromators (HRMs), which incorporate precision positioning, stability control, and various other technologies, are a crucial subclass within this category. The next generation of photon sources imposes higher performance standards upon these HRMs. In this new design framework, the primary focus is on innovating precision motion components. Rigorous analysis and experimentation have confirmed the effectiveness of this design. This structural model provides valuable reference for developing other precision adjustment mechanisms within the realm of synchrotron radiation.

Poster TUPYP017 [3.641 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP017

About •

Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 04 February 2024

Cite •

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

TUPYP018

Design and Improvements of a Cryo-Cooled Horizontal Diffracting Double Crystal Monochromator for HEPS

55

Y.S. Zhang, H. Liang, Y.S. Lu, D.S. Shen, L. Zhang
IHEP, Beijing, People’s Republic of China

Horizontal diffracting double crystal monochromator(HDCM) are usually used in a 4th generation light source beamline due to the larger source size in the horizontal direction. This paper introduces the mechanical design and optimization of a HDCM for Low-dimension Structure Probe Beamline of HEPS. In order to achieve the high stability requirement of 50nrad RMS, the structural design is optimized and modal improved through FEA. In order to meet the requirement of a total crystal slope error below 0.3¿rad, FEA optimizations of the clamping for first and second crystal are carried out. The vacuum chamber is optimized to become more compact, improving the maintainability. Fabrication of the HDCM is under way. The results show that the design is capable of guarantee the required surface slope error, stability, and adjustment requirements.

Poster TUPYP018 [1.172 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP018

About •

Received ※ 02 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 11 May 2024

Cite •

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

WEPPP050

Quick scanning Channel-Cut crystal monochromator for millisecond time resolution EXAFS at HEPS

229

Y.S. Lu, H. Liang, Z.K. Liu, D.S. Shen, Z. Sun, Y. Yang, S. Zhang, Y.S. Zhang
IHEP, Beijing, People’s Republic of China

The design and capabilities of a Quick scanning Channel-Cut monochromator (QCCM) for HEPS are presented. The quick scan and step scan are realized by a torque motor directly driven Bragg axis, controlled by a servo controller. This design allows easy and remote control of the oscillation frequency and angular range, providing comprehensive control of QXAFS measure-ments. The cryogenically cooled Si (311) and Si(111) crystals, which extends the energy range from 4.8 keV-45 keV. The dynamic analysis verifies the rationality of the mechanical structure design. The device was fabri-cated and tested, results show an oscillation frequency up to 50Hz with a range of 0.8°, and a resolution of 0.2 arcsecond in step scan mode. This device demonstrates the feasibility of large range quick scan and step scan by a single servo control system.
Quick scanning Channel-Cut crystal monochromator

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP050

About •

Received ※ 02 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 January 2024

Cite •

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

THOAM04

Overall Progress on Development of X-ray Optics Mechanical Systems at High Energy Photon Source (HEPS)

252

S. Tang, Y.H. Dong, X.H. Kuang, M. Li, H. Liang, R.Y. Liao, L.H. Ma, Z.N. Ou, H. Qian, Z.R. Ren, W.F. Sheng, J. Wang, R.Z. Xu, H.H. Yu
IHEP, People’s Republic of China

Funding: This work is supported by the project of High Energy Photon Source (HEPS).
High Energy Photon Source (HEPS) regarded as a new 4th generation synchrotron radiation facility, is under construction in a virgin green field in Beijing, China. The X-ray optics/mirror mechanical systems (MMS) play an important role, which would be expected to be designed carefully and rigidly for the extremely stable performance requirement of HEPS. In addition, there are indeed big challenges due to so many types of mirror systems, such as white beam mirror (WBM), harmonic suppression mirror (HSM), combined deflecting mirror (CDM), bending mirror, Nano-KB, and the transfocator of Compound refractive lens (CRLs), etc. Therefore, overall progress on design and maunfacturing of the MMS is introduced, in which a promoting strategy and generic mirror mechanical system as a key technology is presented and developed for the project of HEPS. Furthermore, ultra-stable structucture, multi-DOF precision positioning, Eutectic Galium Indium (E-GaIn)-based vibration-decoupling watercooling, clamping, and bending have always been prior designs and considerations.
Shanzhi Tang, Weifan Sheng, Jianye Wang, et al, Overall progress on the design of mirror mechanical systems at High Energy Photon Source (HEPS), SRI2021, Hamburg Germany, 2022. POSTER

Slides THOAM04 [2.328 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM04

About •

Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 July 2024

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)

THPPP023

Design and Test of a New Crystal Assembly for a Double Crystal Monochromator

313

Y. Yang, H. Liang, Z.K. Liu, Y.S. Lu, D.S. Shen, L. Zhang, S. Zhang, Y.S. Zhang
IHEP, Beijing, People’s Republic of China

Vertical diffraction monochromator is a typical optical device in synchrotron radiation device. Its main requirements and characteristics are high Angle accuracy and stability. Due to the high requirements of new light sources, high precision and high stability have become a common difficulty. This paper mainly introduces the design and test of an internal crystal module of HDCM. There are two main parts: the first crystal and the second crystal. The first crystal assembly includes crystal cooling and clamping, using microchannel edge cooling and flat plate clamping schemes. The second crystal component, through the motor to the top, drives the flexible hinge, and then realizes the rotation of the crystal. At the same time, the Angle monitoring system is designed. The design scheme is verified by processing. The shape of the clamping surface of a crystal component meets the requirements of use. The motion test of the two crystal components is carried out in the atmosphere, vacuum and low temperature vacuum environment, and the results are much higher than the required parameters. And the whole stability is tested. It has high stability.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP023

About •

Received ※ 02 November 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 19 December 2023

Cite •

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