MEDSI2023 - List of Keywords (ISOL)

Paper	Title	Other Keywords	Page
TUPYP018	Design and Improvements of a Cryo-Cooled Horizontal Diffracting Double Crystal Monochromator for HEPS	vacuum, cavity, photon, cryogenics	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)

WEOAM03	Magnetic Levitation on a Budget: A Student Discount	controls, simulation, coupling, software	125
	J.H. Kelly, D. Crivelli, S. Farrelly, M.L. Hurlstone DLS, Oxfordshire, United Kingdom
	The successful mechatronics development i.e. modelling, simulation, design, build and test of a magnetic levitation stage at the Diamond Light Source is presented. The concept was to use a low control Bandwidth across the 6 degree of freedom MIMO system, to provide both an alignment stage and vibration isolation. The project simultaneously upskilled staff and developed a proof-of-concept system demonstrator at a low cost. The final motion stage was constructed for a component cost of less than £15,000.
	Slides WEOAM03 [6.344 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOAM03
About •	Received ※ 31 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 11 November 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP041	The Joy of Vibration Mitigation	damping, optics, acceleration, synchrotron	212
	J.H. Kelly, S.G. Alcock, S.A. Beamish, D. Crivelli DLS, Oxfordshire, United Kingdom
	The decision was made to build a new Optics Metrology Lab at the Diamond Light Source in a location with 100 times higher floor velocity in the range 50-150Hz than the original location. This paper describes the successful engineering developments to mitigate this. The raft of measures included ‘skyhook¿ damping i.e. active damping using geophone velocity feedback, novel 2 stage passive vibration isolation and fundamental research into acoustic coupling of air conditioning noise. The new systems have been installed, the final performance tested and the optics scientists have been able to continue their sensitive measurements.
	Poster WEPPP041 [1.826 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP041
About •	Received ※ 31 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 25 March 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOBM02	First Results of a New Hydrostatic Leveling System on Test Procedures at Sirius	monitoring, operation, software, alignment	261
	W.R. Heinrich, G.R.S. Gama, G.J. Montagner, S.P. Oliveira, E. Teixeira SETUP, Campinas, Brazil R.B. Cardoso, L.R. Leão, S.R. Marques CNPEM, Campinas, SP, Brazil R.T. Neuenschwander LNLS, Campinas, Brazil
	Funding: FAPESP - Research Support Foundation of the State of Sao Paulo FINEP - Financier of Studies and Projects Program PIPE/PAPPE Subsidy - Phase 3 Process IDs: 2016/50070-3 and 2016/50522-1 The Hydrostatic Leveling System (HLS) is commonly employed in Structural Health Monitoring (SHM) to anticipate issues in large-scale structures. Particularly in structures like particle accelerators, it is used in high-precision alignment, where small differences in elevation such as terrestrial tides, could affect machine operation. This study outlines the development and evaluation of the first HLS based in Linear Variable Differential Transformer (LVDT) and were used to monitor the structure at LNLS/CNPEM, Brazil, from 2020 to 2023. A comparative analysis with a capacitance-based off-the-shelf HLS was executed, and experimental data analyzed through Fast Fourier Transform (FFT) confirmed the presence of tidal components in both HLS¿s data. Additionally, the correlation between level and temperature data was demonstrated by Pearson coefficient. The Setup-HLS device, developed with support from Brazilian national resources, exhibited accurate measurements in building tilt and diurnal and semi-diurnal Earth tide variations. Future researches include a calibration jig and an online verification system. This research provides a viable alternative to existing HLS systems.
	Slides THOBM02 [10.405 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOBM02
About •	Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 12 March 20244
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOBM04	Development of a Mirror Chamber System for SHINE Project	vacuum, experiment, FEL, linac	266
	F. Liu, S. He, W. Li, Z. Wang, T. Wu, H. Yuan, X. Zhang ShanghaiTech University, Shanghai, People’s Republic of China J.H. Chen, L. Zhang, W. Zhu SARI-CAS, Pudong, Shanghai, People’s Republic of China
	A 5-dof mirror chamber test system was developed to adjust offset mirror or distribution mirror for the SHINE project. Two linear guides were used for horizontal translation and rough pitch adjustment. three vertical gearboxes were used for height, roll and yaw adjustments. in the vacuum, a fine flexure structure was engineered for the fine pitch adjustment with a piezo actuator. To prevent the cooling vibrations, the cooling module was seperately fixed and the heat from the mirror was conducted by Ga/In to the cooling block. Pitch angular vibration were measured by several equipments with different conditions. Results showed that the pitch angular vibration is below 40nrad without active vibration control, and below 10nrad with active vibration isolation system.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOBM04
About •	Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 23 February 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPPP037	A Micro-Vibration Active Control Method Based on Piezoelectric Ceramic Actuator	controls, quadrupole, electron, free-electron-laser	330
	Z. Lei, H.X. Deng, R. Deng SARI-CAS, Pudong, Shanghai, People’s Republic of China
	Funding: This work was supported by the CAS Project for Young Scientists in Basic Research (YSBR-042), the National Natural Science Foundation of China (12125508, 11935020) In linear accelerator, ground vibration is transmitted to beam element (quadrupole magnet, etc.) through support, and then reflected to the influence of beam orbit or effective emittance. In order to reduce the influence of ground vibration on beam orbit stability, an active vibration isolation platform can be used. In this paper, an active vibration isolation system is proposed, which realizes the inverse dynamic process based on a nano-positioning platform and combines with a proportional controller to reduce the transmission of ground-based excitation to the beam element. The absolute vibration velocity signal obtained from the sensor is input to the controller as feedforward signal. The controller processes the input signal and then the output signal drives the piezoelectric ceramic actuator to generate displacement, realizing the active vibration control. The test results of the prototype show that the active vibration isolation system can achieve 50% displacement attenuation, which indicates that the vibration control strategy has certain engineering application value in the construction of large accelerators.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP037
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 15 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUPYP018

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

vacuum, cavity, photon, cryogenics

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)

WEOAM03

Magnetic Levitation on a Budget: A Student Discount

controls, simulation, coupling, software

125

J.H. Kelly, D. Crivelli, S. Farrelly, M.L. Hurlstone
DLS, Oxfordshire, United Kingdom

The successful mechatronics development i.e. modelling, simulation, design, build and test of a magnetic levitation stage at the Diamond Light Source is presented. The concept was to use a low control Bandwidth across the 6 degree of freedom MIMO system, to provide both an alignment stage and vibration isolation. The project simultaneously upskilled staff and developed a proof-of-concept system demonstrator at a low cost. The final motion stage was constructed for a component cost of less than £15,000.

Slides WEOAM03 [6.344 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOAM03

About •

Received ※ 31 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 11 November 2023

Cite •

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

WEPPP041

The Joy of Vibration Mitigation

damping, optics, acceleration, synchrotron

212

J.H. Kelly, S.G. Alcock, S.A. Beamish, D. Crivelli
DLS, Oxfordshire, United Kingdom

The decision was made to build a new Optics Metrology Lab at the Diamond Light Source in a location with 100 times higher floor velocity in the range 50-150Hz than the original location. This paper describes the successful engineering developments to mitigate this. The raft of measures included ‘skyhook¿ damping i.e. active damping using geophone velocity feedback, novel 2 stage passive vibration isolation and fundamental research into acoustic coupling of air conditioning noise. The new systems have been installed, the final performance tested and the optics scientists have been able to continue their sensitive measurements.

Poster WEPPP041 [1.826 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP041

About •

Received ※ 31 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 25 March 2024

Cite •

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

THOBM02

First Results of a New Hydrostatic Leveling System on Test Procedures at Sirius

monitoring, operation, software, alignment

261

W.R. Heinrich, G.R.S. Gama, G.J. Montagner, S.P. Oliveira, E. Teixeira
SETUP, Campinas, Brazil
R.B. Cardoso, L.R. Leão, S.R. Marques
CNPEM, Campinas, SP, Brazil
R.T. Neuenschwander
LNLS, Campinas, Brazil

Funding: FAPESP - Research Support Foundation of the State of Sao Paulo FINEP - Financier of Studies and Projects Program PIPE/PAPPE Subsidy - Phase 3 Process IDs: 2016/50070-3 and 2016/50522-1
The Hydrostatic Leveling System (HLS) is commonly employed in Structural Health Monitoring (SHM) to anticipate issues in large-scale structures. Particularly in structures like particle accelerators, it is used in high-precision alignment, where small differences in elevation such as terrestrial tides, could affect machine operation. This study outlines the development and evaluation of the first HLS based in Linear Variable Differential Transformer (LVDT) and were used to monitor the structure at LNLS/CNPEM, Brazil, from 2020 to 2023. A comparative analysis with a capacitance-based off-the-shelf HLS was executed, and experimental data analyzed through Fast Fourier Transform (FFT) confirmed the presence of tidal components in both HLS¿s data. Additionally, the correlation between level and temperature data was demonstrated by Pearson coefficient. The Setup-HLS device, developed with support from Brazilian national resources, exhibited accurate measurements in building tilt and diurnal and semi-diurnal Earth tide variations. Future researches include a calibration jig and an online verification system. This research provides a viable alternative to existing HLS systems.

Slides THOBM02 [10.405 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOBM02

About •

Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 12 March 20244

Cite •

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

THOBM04

Development of a Mirror Chamber System for SHINE Project

vacuum, experiment, FEL, linac

266

F. Liu, S. He, W. Li, Z. Wang, T. Wu, H. Yuan, X. Zhang
ShanghaiTech University, Shanghai, People’s Republic of China
J.H. Chen, L. Zhang, W. Zhu
SARI-CAS, Pudong, Shanghai, People’s Republic of China

A 5-dof mirror chamber test system was developed to adjust offset mirror or distribution mirror for the SHINE project. Two linear guides were used for horizontal translation and rough pitch adjustment. three vertical gearboxes were used for height, roll and yaw adjustments. in the vacuum, a fine flexure structure was engineered for the fine pitch adjustment with a piezo actuator. To prevent the cooling vibrations, the cooling module was seperately fixed and the heat from the mirror was conducted by Ga/In to the cooling block. Pitch angular vibration were measured by several equipments with different conditions. Results showed that the pitch angular vibration is below 40nrad without active vibration control, and below 10nrad with active vibration isolation system.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOBM04

About •

Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 23 February 2024

Cite •

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

THPPP037

A Micro-Vibration Active Control Method Based on Piezoelectric Ceramic Actuator

controls, quadrupole, electron, free-electron-laser

330

Z. Lei, H.X. Deng, R. Deng
SARI-CAS, Pudong, Shanghai, People’s Republic of China

Funding: This work was supported by the CAS Project for Young Scientists in Basic Research (YSBR-042), the National Natural Science Foundation of China (12125508, 11935020)
In linear accelerator, ground vibration is transmitted to beam element (quadrupole magnet, etc.) through support, and then reflected to the influence of beam orbit or effective emittance. In order to reduce the influence of ground vibration on beam orbit stability, an active vibration isolation platform can be used. In this paper, an active vibration isolation system is proposed, which realizes the inverse dynamic process based on a nano-positioning platform and combines with a proportional controller to reduce the transmission of ground-based excitation to the beam element. The absolute vibration velocity signal obtained from the sensor is input to the controller as feedforward signal. The controller processes the input signal and then the output signal drives the piezoelectric ceramic actuator to generate displacement, realizing the active vibration control. The test results of the prototype show that the active vibration isolation system can achieve 50% displacement attenuation, which indicates that the vibration control strategy has certain engineering application value in the construction of large accelerators.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP037

About •

Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 15 December 2023

Cite •

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