MEDSI2023 - Table of Session: THOBM (Precision Mechanics B)

Paper	Title	Page
THOBM01	Structural Dynamic Testing and Design Evaluation of the Formax Detector Gantry
	G. Felcsuti, J.B. González Fernández MAX IV Laboratory, Lund University, Lund, Sweden
	ForMAX, a new beamline at MAX IV, offers multi-scale structural characterization of hierarchical materials from nm to mm length scales by combining full-field microtomography and small- and wide-angle x-ray scattering (SWAXS) techniques. The sample position features a two-meter-high granite gantry that enables independent movement of the tomography microscope and wide-angle x-ray (WAXS) detector in and out of the x-ray beam, as well as along the beam on motorized floor rails. Ensuring optimal experimental performance requires high stiffness and low vibration amplitudes which are challenging goals to achieve with such slender structures. This study focuses on the structural dynamics of the gantry and summarizes the verifications tests that were conducted to assess the structure¿s sensitivity to ambient disturbances. Experimental modal analysis was employed to investigate the structural dynamics of the gantry and the obtained mode shapes are compared to the finite element calculations based on the Modal Assurance Criterion (MAC). Special attention is paid to the pneumatic brake on the detector’s floor rails that was implemented to increase the lowest eigenfrequency of the gantry.
	Slides THOBM01 [3.834 MB]
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THOBM02	First Results of a New Hydrostatic Leveling System on Test Procedures at Sirius	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)

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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THOBM04	Development of a Mirror Chamber System for SHINE Project	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)

Paper

Title

Page

THOBM01

Structural Dynamic Testing and Design Evaluation of the Formax Detector Gantry

G. Felcsuti, J.B. González Fernández
MAX IV Laboratory, Lund University, Lund, Sweden

ForMAX, a new beamline at MAX IV, offers multi-scale structural characterization of hierarchical materials from nm to mm length scales by combining full-field microtomography and small- and wide-angle x-ray scattering (SWAXS) techniques. The sample position features a two-meter-high granite gantry that enables independent movement of the tomography microscope and wide-angle x-ray (WAXS) detector in and out of the x-ray beam, as well as along the beam on motorized floor rails. Ensuring optimal experimental performance requires high stiffness and low vibration amplitudes which are challenging goals to achieve with such slender structures. This study focuses on the structural dynamics of the gantry and summarizes the verifications tests that were conducted to assess the structure¿s sensitivity to ambient disturbances. Experimental modal analysis was employed to investigate the structural dynamics of the gantry and the obtained mode shapes are compared to the finite element calculations based on the Modal Assurance Criterion (MAC). Special attention is paid to the pneumatic brake on the detector’s floor rails that was implemented to increase the lowest eigenfrequency of the gantry.

Slides THOBM01 [3.834 MB]

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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

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)

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)

THOBM04

Development of a Mirror Chamber System for SHINE Project

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)