MEDSI2023 - List of Authors (Yang, J.L.)

Paper	Title	Page
TUOBM07	Newly Developed Wavefront Metrology Technique and Applying in Crystal Processing
	F. Liu, Q.S. Diao, Z. Hong, M. Li, H. Lian, J.L. Yang IHEP, People’s Republic of China
	In this work, we firstly propose an innovative wavefront metrology method at Beijing Synchrotron Radiation Facility (BSRF), named the double edges scan (DES) wavefront metrology technique. As the method resolved several vital problems of the first-generation synchrotron radiation source, including inferior lateral coherence, poor stability, and distortion of incident wavefront, it realized diffraction limit level wavefront metrology and has been successfully applied to crystal processing, which regarded as an important feedback of the fourth-generation synchrotron radiation source crystal fabrication process. The DES can achieve the precision better than 22.5 nrad (rms) with a 50 microns lateral resolution on crystal surface. The crystal we measured was processed by magnetically controlled small tool, which is also a creative processing technic. The technique gets rid of the limitation of the power system and transmission system, and realized the free machining of channel-cut crystal with narrow space.
	Slides TUOBM07 [4.007 MB]
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TUPYP039	A Design of an X-ray Monochromatic Adjustable Slit for HEPS Beamlines	88
	S. Liu, Q.H. Duan, Q. Han, Z. Li, J.L. Yang, Z.Y. Yue, Q. Zhang, Z.B. Zhang IHEP, People’s Republic of China
	The monochromatic slit is a commonly used device in HEPS beamlines. It can limit the synchrotron beam-spot within a desired size required by the downstream optical equipment. In addition, the four-blade structure is the most widely used form of slit. The slit with this form usually consists of a pair or two parallel tungsten carbide blades. With their edges close to each other, a slit can be formed, and the size of which can be controlled by micromechanical guides. This structure is very suitable for the case of large beamsize. In this work, we have designed a monochromatic slit based on the four-blade form for BF-beamline in HEPS. It can be used in ultra-high vacuum, high luminous flux working environment. The maximum opening range is up to 30mm10mm (HV), while it can allow a white beam of 136mm24mm (HV) to pass through. Furthermore, we adopted a point to surface contact design, which can effectively avoid the over-constraint problem between two guide rails.
	Poster TUPYP039 [0.457 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP039
About •	Received ※ 10 November 2023 — Revised ※ 10 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 July 2024
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TUPYP043	The Design of Test Beamline at HEPS	90
	J.L. Yang, Q.J. Jia, M. Li, P. Liu, Y. Tao IHEP, Beijing, People’s Republic of China
	This paper describes the design of a test beamline for a new generation of high-energy, high-flux, and high-coherence SR beamlines. The beamline will be built at ID42 of HEPS. The beamline includes two sources, a wiggler and an undulator, to provide high-energy, high thermal power, large size, and high-coherence, high-brightness X-ray beams, respectively. In the current design, the beamline mainly has optical components such as monochromators, CRLs, and filters. With different combinations of sources and optical components, the beamline can provide various modes, including white, monochromatic, and focused beam. Using a Si111 DCM, the beamline covers a wide photon energy range from 5 to 45 keV. In the future, the beamline will be capable of providing monochromatic beam with photon energy over 300 keV. The wiggler’s white beam can provide high thermal load test conditions over 1 kW. The beamline offers high flexibility and versatility in terms of available beam size (from micrometers to over 100 mm), energy resolution, and photon flux range. Various experimental techniques including diffraction, spectroscopy, imaging, and at-wavelength measurement can be performed on this beamline.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP043
About •	Received ※ 08 November 2023 — Revised ※ 09 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 April 2024
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WEPPP023	Selection Calculation for the Absorbers of the Filter Equipment of HEPS
	H.Y. Wang, P. Luo, Y.X. Ma, H. Shi, J.L. Yang IHEP, People’s Republic of China
	The under-construction High Energy Photon Source is a fourth-generation synchrotron radiation source. It has two operation modes for its BF beamline station’s insertion devices and extremely high thermal loads. Therefore, it is necessary to use filters to modulate the energy and power of the beam. Filters can effectively absorb part of the thermal load in synchrotron radiation, thereby reducing the thermal load at downstream optical components or experimental samples. This article introduces the parameter design method of the absorbers in the filter, including material selection, thickness allocation, combination method of absorbers, and determination of the number of filter groups. A complete design process is obtained, and key factors affecting the use of filters are analyzed, providing a theoretical basis for the optimization design of the filter equipment. The filter designed using this method has been successfully applied to BF beamline of HEPS.
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Paper

Title

Page

TUOBM07

Newly Developed Wavefront Metrology Technique and Applying in Crystal Processing

F. Liu, Q.S. Diao, Z. Hong, M. Li, H. Lian, J.L. Yang
IHEP, People’s Republic of China

In this work, we firstly propose an innovative wavefront metrology method at Beijing Synchrotron Radiation Facility (BSRF), named the double edges scan (DES) wavefront metrology technique. As the method resolved several vital problems of the first-generation synchrotron radiation source, including inferior lateral coherence, poor stability, and distortion of incident wavefront, it realized diffraction limit level wavefront metrology and has been successfully applied to crystal processing, which regarded as an important feedback of the fourth-generation synchrotron radiation source crystal fabrication process. The DES can achieve the precision better than 22.5 nrad (rms) with a 50 microns lateral resolution on crystal surface. The crystal we measured was processed by magnetically controlled small tool, which is also a creative processing technic. The technique gets rid of the limitation of the power system and transmission system, and realized the free machining of channel-cut crystal with narrow space.

Slides TUOBM07 [4.007 MB]

Cite •

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

TUPYP039

A Design of an X-ray Monochromatic Adjustable Slit for HEPS Beamlines

88

S. Liu, Q.H. Duan, Q. Han, Z. Li, J.L. Yang, Z.Y. Yue, Q. Zhang, Z.B. Zhang
IHEP, People’s Republic of China

The monochromatic slit is a commonly used device in HEPS beamlines. It can limit the synchrotron beam-spot within a desired size required by the downstream optical equipment. In addition, the four-blade structure is the most widely used form of slit. The slit with this form usually consists of a pair or two parallel tungsten carbide blades. With their edges close to each other, a slit can be formed, and the size of which can be controlled by micromechanical guides. This structure is very suitable for the case of large beamsize. In this work, we have designed a monochromatic slit based on the four-blade form for BF-beamline in HEPS. It can be used in ultra-high vacuum, high luminous flux working environment. The maximum opening range is up to 30mm*10mm (H*V), while it can allow a white beam of 136mm*24mm (H*V) to pass through. Furthermore, we adopted a point to surface contact design, which can effectively avoid the over-constraint problem between two guide rails.

Poster TUPYP039 [0.457 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP039

About •

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

Cite •

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

TUPYP043

The Design of Test Beamline at HEPS

90

J.L. Yang, Q.J. Jia, M. Li, P. Liu, Y. Tao
IHEP, Beijing, People’s Republic of China

This paper describes the design of a test beamline for a new generation of high-energy, high-flux, and high-coherence SR beamlines. The beamline will be built at ID42 of HEPS. The beamline includes two sources, a wiggler and an undulator, to provide high-energy, high thermal power, large size, and high-coherence, high-brightness X-ray beams, respectively. In the current design, the beamline mainly has optical components such as monochromators, CRLs, and filters. With different combinations of sources and optical components, the beamline can provide various modes, including white, monochromatic, and focused beam. Using a Si111 DCM, the beamline covers a wide photon energy range from 5 to 45 keV. In the future, the beamline will be capable of providing monochromatic beam with photon energy over 300 keV. The wiggler’s white beam can provide high thermal load test conditions over 1 kW. The beamline offers high flexibility and versatility in terms of available beam size (from micrometers to over 100 mm), energy resolution, and photon flux range. Various experimental techniques including diffraction, spectroscopy, imaging, and at-wavelength measurement can be performed on this beamline.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP043

About •

Received ※ 08 November 2023 — Revised ※ 09 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 April 2024

Cite •

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

WEPPP023

Selection Calculation for the Absorbers of the Filter Equipment of HEPS

H.Y. Wang, P. Luo, Y.X. Ma, H. Shi, J.L. Yang
IHEP, People’s Republic of China

The under-construction High Energy Photon Source is a fourth-generation synchrotron radiation source. It has two operation modes for its BF beamline station’s insertion devices and extremely high thermal loads. Therefore, it is necessary to use filters to modulate the energy and power of the beam. Filters can effectively absorb part of the thermal load in synchrotron radiation, thereby reducing the thermal load at downstream optical components or experimental samples. This article introduces the parameter design method of the absorbers in the filter, including material selection, thickness allocation, combination method of absorbers, and determination of the number of filter groups. A complete design process is obtained, and key factors affecting the use of filters are analyzed, providing a theoretical basis for the optimization design of the filter equipment. The filter designed using this method has been successfully applied to BF beamline of HEPS.

Cite •

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