MEDSI2023 - List of Keywords (target)

Paper	Title	Other Keywords	Page
TUOBM05	The Progress in Design, Preparation and Measurement of MLL for HEPS	focusing, laser, electron, interface	24
	S.P. Yue, G.C. Chang, Q. Hou, B. Ji, M. Li IHEP, People’s Republic of China
	Funding: This work was supported by the National Natural Science Foundation of China (Project12005250¿ The multilayer Laue lens (MLL) is a promising optical element with large numerical aperture and aspect ratio in synchrotron radiation facility. Two multilayers with 63(v)×43(h) ¿m2 aperture and focal spot size of 8.1(v)×8.1(h)nm2 at 10keV are fabricated by a 7-meter-long Laue lens deposition machine. Ultrafast laser etching, dicing and FIB are used to fabricate the multilayer into two-dimensional lenses meeting the requirement of diffraction dynamics. The multilayer grows flat without distortion and shows an amorphous structure characterized by TEM and SAED. The smallest accumulated layer position error is below ±5 nm in the whole area and the rms error is about 2.91nm by SEM and image processing. The focusing performance of MLL with actual film thickness is calculated by a method based on the Takagi¿Taupin description (TTD). The full width at half maximum(FWHM) of focus spot is 8.2×8.4 nm2 which is close to the theoretical result.
	Slides TUOBM05 [7.563 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOBM05
About •	Received ※ 24 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 18 May 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPYP026	Influence of the Groove Curvature on the Spectral Resolution in a Varied-Line-Spacing Plane Grating Monochromator (VLS-PGM)	photon, factory, synchrotron, experiment	67
	J. Du, X.W. Du, Q.P. Wang, Z. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Diffraction-limited synchrotron radiation (DLSR) light source with smaller source size and emittance makes ultra-high spectral resolution beamline possible. Here, we report an undulator-based beamline optical design with ultra-high spectral resolution using a varied-line-spacing plane grating monochromator (VLS-PGM), which is a well-proven design for achieving ultra-high resolution in the soft X-ray band. A VLS plane grating with a central groove density of 2400 l/mm is utilized to cover the photon energy region of 250 ~ 2000eV. VLS gratings are generally fabricated using the holographic method, but the resulting grating grooves are two-dimensionally curved curves, which can affect the resolution of the monochromator. To analyse this effect, we first use a spherical wavefront and an aspherical wavefront to generate the fringes and optimized the recording parameters. We also present a method for calculating the groove curvature of holographic plane VLS grating grooves. Furthermore, the influence of grating groove curvature on beamline resolution is theoretically analysed based on the aberration theory of concave grating.
	Poster TUPYP026 [0.480 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP026
About •	Received ※ 25 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 04 November 2023 — Issued ※ 12 March 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPYP045	Usability Study to Qualify a Maintenance Robotic System for Large Scale Experimental Facility	experiment, framework, radiation, hardware	93
	J.Y. Zhang, L. Kang IHEP, People’s Republic of China J.X. Chen, R.H. Liu, J.B. Yu IHEP CSNS, Guangdong Province, People’s Republic of China J.Y. Zhang UCAS, Beijing, People’s Republic of China
	Funding: This work was supported by the National Natural Science Foundation of China (NSFC)[E0113T5C10],and the Institute for High Energy Physics University of Chinese Academy of Sciences. The primary stripper foil device is one of the most critical devices of The China Spallation Neutron Source Project Phase-II (CSNS-II), which requires regular foil replacement maintenance to ensure its stable operation. To mitigate the potential hazards posed to workers by prolonged exposure to high levels of radiation, a maintenance robotic system has been developed to perform repetitive and precise foil changing task. The proposed framework encompasses various aspects of the robotic system, including hardware structure, target detection, manipulator kinematics design, and system construction. The correctness and efficiency of the sys-tem are demonstrated through simulations carried out using ROS Moveit! and GAZEBO.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP045
About •	Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 28 January 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPYP051	Progress of WALS NEG Coating Equipment and Technology	vacuum, controls, experiment, site	108
	G. Wei, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, J. Li, C.Y. Liu, Y. Nie, J. Wang, Y. Wang, P. Xiang, Y. Xu, J.M. Zhang, Y.X. Zhang, Y. Zou IAS, Wuhan City, People’s Republic of China
	The goal of WALS (Wuhan Advanced Light Source) is to build a world -class radiating light source. Chromium-zirconium-copper was chosen as the main material for the entire storage ring vacuum vessels. And magnetron sputtering (PVD) process was used to deposit NEG coating on the inner surface of copper vacuum chamber, which can further improve the performance of the vacuum. At present, the coating laboratory has taken shape as a whole, and has built a standard cleaning platform, coating platform, ultimate vacuum test platform, extraction rate test platform, coating microstructure test process. As for the coating equipment, bias power supply and custom ceramic parts are added to achieve more functions. Different target materials were controlled by multi-electrode control, while experiments were performed on deposited compositions of different ratios of multilayers; Sample tube bias control access during the coating process; Multiple combinations of target materials and bias parameters for the technique have been studied. Coating is currently underway, and specific test results are in progress.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP051
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 15 November 2023 — Issued ※ 18 July 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPPP020	The Pre-alignment of High Energy Photon Source Storage Ring	alignment, laser, storage-ring, real-time	310
	S. Lu, L. Dong, L.L. Men, X.L. Wang IHEP, Beijing, People’s Republic of China J. Liang, T. Wang DNSC, Dongguan, People’s Republic of China
	In order to achieve 10 micrometer pre-alignment accuracy of storage ring in transverse and vertical, four laser trackers were used for set up a four-station multilateration measurement system. Experiment results show that the relative displacement measurement accuracy is better than 3 micrometer in 3-meter workpiece range, which can satisfy the real-time position feedback accuracy of the magnets in the process of ultra-high-precision pre-alignment. After two years of research and development, three pre-alignment standard workstations have been established. And the laser multilateration measurement method is adopted to the pre-alignment of the three, five and eight magnet girders in the storage ring of HEPS. Currently, 240 out of 288 girders have been pre-aligned after half a year of work.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP020
About •	Received ※ 07 November 2023 — Revised ※ 08 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 03 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUOBM05

The Progress in Design, Preparation and Measurement of MLL for HEPS

focusing, laser, electron, interface

24

S.P. Yue, G.C. Chang, Q. Hou, B. Ji, M. Li
IHEP, People’s Republic of China

Funding: This work was supported by the National Natural Science Foundation of China (Project12005250¿
The multilayer Laue lens (MLL) is a promising optical element with large numerical aperture and aspect ratio in synchrotron radiation facility. Two multilayers with 63(v)×43(h) ¿m2 aperture and focal spot size of 8.1(v)×8.1(h)nm2 at 10keV are fabricated by a 7-meter-long Laue lens deposition machine. Ultrafast laser etching, dicing and FIB are used to fabricate the multilayer into two-dimensional lenses meeting the requirement of diffraction dynamics. The multilayer grows flat without distortion and shows an amorphous structure characterized by TEM and SAED. The smallest accumulated layer position error is below ±5 nm in the whole area and the rms error is about 2.91nm by SEM and image processing. The focusing performance of MLL with actual film thickness is calculated by a method based on the Takagi¿Taupin description (TTD). The full width at half maximum(FWHM) of focus spot is 8.2×8.4 nm2 which is close to the theoretical result.

Slides TUOBM05 [7.563 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUOBM05

About •

Received ※ 24 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 18 May 2024

Cite •

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

TUPYP026

Influence of the Groove Curvature on the Spectral Resolution in a Varied-Line-Spacing Plane Grating Monochromator (VLS-PGM)

photon, factory, synchrotron, experiment

67

J. Du, X.W. Du, Q.P. Wang, Z. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China

Diffraction-limited synchrotron radiation (DLSR) light source with smaller source size and emittance makes ultra-high spectral resolution beamline possible. Here, we report an undulator-based beamline optical design with ultra-high spectral resolution using a varied-line-spacing plane grating monochromator (VLS-PGM), which is a well-proven design for achieving ultra-high resolution in the soft X-ray band. A VLS plane grating with a central groove density of 2400 l/mm is utilized to cover the photon energy region of 250 ~ 2000eV. VLS gratings are generally fabricated using the holographic method, but the resulting grating grooves are two-dimensionally curved curves, which can affect the resolution of the monochromator. To analyse this effect, we first use a spherical wavefront and an aspherical wavefront to generate the fringes and optimized the recording parameters. We also present a method for calculating the groove curvature of holographic plane VLS grating grooves. Furthermore, the influence of grating groove curvature on beamline resolution is theoretically analysed based on the aberration theory of concave grating.

Poster TUPYP026 [0.480 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP026

About •

Received ※ 25 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 04 November 2023 — Issued ※ 12 March 2024

Cite •

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

TUPYP045

Usability Study to Qualify a Maintenance Robotic System for Large Scale Experimental Facility

experiment, framework, radiation, hardware

93

J.Y. Zhang, L. Kang
IHEP, People’s Republic of China
J.X. Chen, R.H. Liu, J.B. Yu
IHEP CSNS, Guangdong Province, People’s Republic of China
J.Y. Zhang
UCAS, Beijing, People’s Republic of China

Funding: This work was supported by the National Natural Science Foundation of China (NSFC)[E0113T5C10],and the Institute for High Energy Physics University of Chinese Academy of Sciences.
The primary stripper foil device is one of the most critical devices of The China Spallation Neutron Source Project Phase-II (CSNS-II), which requires regular foil replacement maintenance to ensure its stable operation. To mitigate the potential hazards posed to workers by prolonged exposure to high levels of radiation, a maintenance robotic system has been developed to perform repetitive and precise foil changing task. The proposed framework encompasses various aspects of the robotic system, including hardware structure, target detection, manipulator kinematics design, and system construction. The correctness and efficiency of the sys-tem are demonstrated through simulations carried out using ROS Moveit! and GAZEBO.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP045

About •

Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 28 January 2024

Cite •

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

TUPYP051

Progress of WALS NEG Coating Equipment and Technology

vacuum, controls, experiment, site

108

G. Wei, Y. Chen, X.R. Hao, J.H. He, H.H. Li, H. Li, J. Li, C.Y. Liu, Y. Nie, J. Wang, Y. Wang, P. Xiang, Y. Xu, J.M. Zhang, Y.X. Zhang, Y. Zou
IAS, Wuhan City, People’s Republic of China

The goal of WALS (Wuhan Advanced Light Source) is to build a world -class radiating light source. Chromium-zirconium-copper was chosen as the main material for the entire storage ring vacuum vessels. And magnetron sputtering (PVD) process was used to deposit NEG coating on the inner surface of copper vacuum chamber, which can further improve the performance of the vacuum. At present, the coating laboratory has taken shape as a whole, and has built a standard cleaning platform, coating platform, ultimate vacuum test platform, extraction rate test platform, coating microstructure test process. As for the coating equipment, bias power supply and custom ceramic parts are added to achieve more functions. Different target materials were controlled by multi-electrode control, while experiments were performed on deposited compositions of different ratios of multilayers; Sample tube bias control access during the coating process; Multiple combinations of target materials and bias parameters for the technique have been studied. Coating is currently underway, and specific test results are in progress.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP051

About •

Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 15 November 2023 — Issued ※ 18 July 2024

Cite •

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

THPPP020

The Pre-alignment of High Energy Photon Source Storage Ring

alignment, laser, storage-ring, real-time

310

S. Lu, L. Dong, L.L. Men, X.L. Wang
IHEP, Beijing, People’s Republic of China
J. Liang, T. Wang
DNSC, Dongguan, People’s Republic of China

In order to achieve 10 micrometer pre-alignment accuracy of storage ring in transverse and vertical, four laser trackers were used for set up a four-station multilateration measurement system. Experiment results show that the relative displacement measurement accuracy is better than 3 micrometer in 3-meter workpiece range, which can satisfy the real-time position feedback accuracy of the magnets in the process of ultra-high-precision pre-alignment. After two years of research and development, three pre-alignment standard workstations have been established. And the laser multilateration measurement method is adopted to the pre-alignment of the three, five and eight magnet girders in the storage ring of HEPS. Currently, 240 out of 288 girders have been pre-aligned after half a year of work.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP020

About •

Received ※ 07 November 2023 — Revised ※ 08 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 03 December 2023

Cite •

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