MEDSI2023 - List of Keywords (interface)

Paper	Title	Other Keywords	Page
TUOBM05	The Progress in Design, Preparation and Measurement of MLL for HEPS	focusing, laser, target, electron	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)

TUPYP004	A Setup for the Evaluation of Thermal Contact Resistance at Cryogenic Temperatures Under Controlled Pressure Rates	cryogenics, radiation, vacuum, alignment	37
	B.A. Francisco, D.Y. Kakizaki, M. Saveri Silva, W.H. Wilendorf, V.B. Zilli, G.S. de Albuquerque LNLS, Campinas, Brazil V.C. Kuriyama CNPEM, Campinas, SP, Brazil A. Lopes Ribeiro Federal University of Uberlandia, Uberlândia, M.G., Brazil J.H. dos Santos IF-UFRGS, Porto Alegre, Brazil
	The design of optical elements compass different development areas, such as optics, structures and dynamics, thermal, and control. In particular, the thermal designs of mirrors aim to minimize deformations, whose usual requirements are around 5 nm RMS and slope errors in the order of 150 nrad RMS. One of the main sources of uncertainties in thermal designs is the inconsistency in values of thermal contact resistances (TCR) found in the literature. A device based on the ASTM D5470 standard was proposed and designed to measure the TCR among materials commonly used in mirror systems. Precision engineering design tools were used to deal with the challenges related to the operation at cryogenic temperatures (145 K) and under several pressures rates (1~10 MPa) whilst ensuring the alignment between the specimens. We observed using indium as Thermal Interface Material reduced the TCR in 10~42,2% for SS316/Cu contacts, and 31~81% for Al/Cu. Upon analyzing the measurements, we identified some areas for improvements in the equipment, such as mitigating radiation and improving the heat flow in the cold part of the system that were implemented for the upgraded version.
	Poster TUPYP004 [2.549 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP004
About •	Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 22 April 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPYP022	The Development and Application of Motion Control System for HEPS Beamline	controls, EPICS, hardware, synchrotron	61
	Z.Y. Yue, X.B. Deng, Z.H. Gao, G. Li, Y. Liu, C.X. Yin, D.S. Zhang, Q. Zhang, A.Y. Zhou IHEP, Beijing, People’s Republic of China
	In synchrotron radiation facilities such as the High Energy Photon Source (HEPS) beamline, thousands of motorized actuators are equipped on different optical devices, such as K-B mirrors, monochromator and transfocators, in order to acquire the specified properties of X-ray. The motion control system, as a part of the ultra-precision mechatronics devices, is used to precison positioning control, which not only has ability to realize basic motion functions but also can handle complex motion control requirements. HEPS has developed a standardized motion control system(MCS) for synchrotron radiation applications. In this paper, The structure of hardware and software of MCS will be presented, and some applications are demonstrated in detail.
	Poster TUPYP022 [0.847 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP022
About •	Received ※ 30 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 April 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPYP028	Thermal Analysis Software for Optical Elements of Hefei Advanced Light Facility*	software, optics, synchrotron, radiation	73
	M.H. Lin, J. Chen, S.K. Jiang, Q.P. Wang, Z. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Thermal deformation is a key influencing factor in the surface shape of optical components for beamline optics. In the process of beamline design, it is necessary not only to select different cooling schemes based on thermal loading conditions but also to extensively optimize the parameters of these cooling schemes. The traditional approach for optimizing cooling scheme design often requires significant manual effort. By integrating existing experience in optimizing cooling scheme designs, this study transforms the parameterized design tasks that were originally performed manually into automated processes using software. This paper presents the latest advancements in the automated design software for cooling schemes of beamline optical components, and the results indicate that the optimization outcomes of the existing automated design software are close to those achieved through manual optimization.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP028
About •	Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 03 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP034	ALBA Experimental Set Up for the Evaluation of Thermal Contact Conductance Under Cryogenic and Vacuum Conditions	experiment, vacuum, cryogenics, synchrotron	199
	O. Traver Ramos, J.J. Casas, C. Colldelram, J.L. Frieiro, B. Molas, M. Quispe, M. Sanchez ALBA-CELLS, Cerdanyola del Vallès, Spain
	The Thermal Contact Conductance (TCC) between two surfaces plays a very important role in the design of components in particle accelerators. The TCC depends on many variables such as surface finish, type of material, pressure, temperature, etc. As a general rule, the TCC comes from experimental results reported in the specialized literature. However, it is not always possible to find this information, especially if components are designed to operate in cryogenic and vacuum conditions, for this reason, assumptions are made that render results with high uncertainty. In this context, ALBA has designed an experimental set up to carry out axial heat flow steady state experiments for the evaluation of TCC under vacuum and cryogenic conditions. The minimum pressure achievable in the set up will be 1e-5 mbar while the temperature may vary between 80 and 300 K. The results will provide inputs to further optimize ALBA designs, including ALBA II, our ongoing fourth-generation synchrotron upgrade project. This paper describes the experimental setup, the thermal and mechanical design considerations and experimental validation tests.
	Poster WEPPP034 [0.616 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP034
About •	Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 05 April 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPPP039	Data Preprocessing Method of High-Frequency Sampling XAFS Spectra Collected in a Novel Combined SAXS/XRD/XAFS Technique	detector, synchrotron, experiment, data-acquisition	207
	Y.P. Liu, Z.J. Chen, G. Mo, Z.H. Wu IHEP, Beijing, People’s Republic of China
	High-frequency (HF) sampling X-ray absorption fine structure (XAFS) spectra with a time-resolution of ~8s were collected in our newly developed synchrotron radiation small-angle X-ray scattering (SAXS)/X-ray diffraction (XRD)/XAFS combined technique. Restoring the HF XAFS spectrum which contains hundreds of thousands to millions of data points to a normal XAFS spectrum consisting of hundreds of data points is a critical step for the subsequent neighbor structure analysis. Herein, the data preprocessing method and procedure of HF XAFS spectra were proposed according to the absorption edge of the standard sample and the rotation angular velocity of the monochromator. This work is expected to facilitate the potential applications of HF XAFS spectra in a time-resolved SAXS/XRD/XAFS experiment.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP039
About •	Received ※ 31 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 18 May 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOAM02	SmarGon MCS2: An Enhanced Multi-Axis Goniometer with a New Control System	controls, operation, software, synchrotron	247
	W. Glettig, D. Buntschu, E.H. Panepucci, M. Wang PSI, Villigen PSI, Switzerland A. Omelcenko SmarAct, Oldenburg, Germany
	As an improvement on the commercially available SmarGon multi-axis goniometer (SmarAct GmbH), the MX Group at the Paul Scherrer Institute (PSI) has been pursuing further development of the system. In addition to suggesting mechanical improvements to SmarAct to improve ruggedness and reliability, PSI has developed a brand-new and flexible control system for better customization, reliability and control. Calibration routines were implemented to reduce systemic errors, and the system has been tailored for practical beamline usage. SmarGon is a six degree-of-freedom positioning device, allowing positioning of a sample and orientation around any given point, with <5um sphere of confusion diameter. It was purpose-built for protein-crystallography experiments but, as will be presented here, was also re-purposed for other applications. Two devices have been in continuous 24/7 use for two years at the MX Beamlines PXI & PXII at SLS.
	Slides THOAM02 [77.940 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM02
About •	Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 08 January 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPPP029	Technologies Concerning Metal Seals of the UHV System for Accelerators	vacuum, simulation, experiment, injection	322
	H.Y. He, Y.S. Ma IHEP, Beijing, People’s Republic of China L. Liu, P.C. Wang IHEP CSNS, Guangdong Province, People’s Republic of China B. Tan Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China
	Reviewed the domestic research on structural design and sealing function principle of the metal seals, wildly used in the Ultra High Vacuum (UHV) system for accelerators. Analyzed and summarized the key technologies concerning the material, contact forms, machining process and test methods of sealing performance. The study will become the basis of designing, machining and quality measuring for the ultra-vacuum metal seals. It provided the foundation for generating seals standards to promote the development of vacuum technology application.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP029
About •	Received ※ 27 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 26 November 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPPP040	The Girder System Prototype for ALBA II Storage Ring	storage-ring, vacuum, GUI, lattice	335
	L.R.M. Ribó, J.B. Boyer, C. Colldelram, N. González, L. Nikitina, F. Pérez ALBA-CELLS, Cerdanyola del Vallès, Spain
	The main goal of the upgrade of ALBA Synchrotron Light Facility into ALBA II is the transformation of the current accelerator into a diffraction limited storage ring, which implies the reduction of the emittance by at least a factor of twenty [1]. The upgrade will be executed before the end of the decade and will be profiting at maximum all existing ALBA infrastructures, in particular the building. The whole magnet layout of the lattice [2] has to be supported with a sequence of girders for their positioning with respect to another located in an adjacent girder with an accuracy of 50 µm to ensure the functionality of the accelerator. Besides the girders must enable the remote repositioning the magnets against the overall deformation of the site while ensuring the vibrational stability of the components on top. Easiness of assembling and installation of the different subsystems of the machine on top of the girder has to be considered also as a design requirement, in order to minimize the installation time. Two prototypes are planned to be built next year in order to check its full functionality [1]ALBA II Accelerator Upgrade Project Status, IPAC¿23 proceedings [2]Progress on the 6BA lattice for ALBAII, IPAC’23 proceedings
	Poster THPPP040 [1.710 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP040
About •	Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 26 November 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, target, electron

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)

TUPYP004

A Setup for the Evaluation of Thermal Contact Resistance at Cryogenic Temperatures Under Controlled Pressure Rates

cryogenics, radiation, vacuum, alignment

37

B.A. Francisco, D.Y. Kakizaki, M. Saveri Silva, W.H. Wilendorf, V.B. Zilli, G.S. de Albuquerque
LNLS, Campinas, Brazil
V.C. Kuriyama
CNPEM, Campinas, SP, Brazil
A. Lopes Ribeiro
Federal University of Uberlandia, Uberlândia, M.G., Brazil
J.H. dos Santos
IF-UFRGS, Porto Alegre, Brazil

The design of optical elements compass different development areas, such as optics, structures and dynamics, thermal, and control. In particular, the thermal designs of mirrors aim to minimize deformations, whose usual requirements are around 5 nm RMS and slope errors in the order of 150 nrad RMS. One of the main sources of uncertainties in thermal designs is the inconsistency in values of thermal contact resistances (TCR) found in the literature. A device based on the ASTM D5470 standard was proposed and designed to measure the TCR among materials commonly used in mirror systems. Precision engineering design tools were used to deal with the challenges related to the operation at cryogenic temperatures (145 K) and under several pressures rates (1~10 MPa) whilst ensuring the alignment between the specimens. We observed using indium as Thermal Interface Material reduced the TCR in 10~42,2% for SS316/Cu contacts, and 31~81% for Al/Cu. Upon analyzing the measurements, we identified some areas for improvements in the equipment, such as mitigating radiation and improving the heat flow in the cold part of the system that were implemented for the upgraded version.

Poster TUPYP004 [2.549 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP004

About •

Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 22 April 2024

Cite •

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

TUPYP022

The Development and Application of Motion Control System for HEPS Beamline

controls, EPICS, hardware, synchrotron

61

Z.Y. Yue, X.B. Deng, Z.H. Gao, G. Li, Y. Liu, C.X. Yin, D.S. Zhang, Q. Zhang, A.Y. Zhou
IHEP, Beijing, People’s Republic of China

In synchrotron radiation facilities such as the High Energy Photon Source (HEPS) beamline, thousands of motorized actuators are equipped on different optical devices, such as K-B mirrors, monochromator and transfocators, in order to acquire the specified properties of X-ray. The motion control system, as a part of the ultra-precision mechatronics devices, is used to precison positioning control, which not only has ability to realize basic motion functions but also can handle complex motion control requirements. HEPS has developed a standardized motion control system(MCS) for synchrotron radiation applications. In this paper, The structure of hardware and software of MCS will be presented, and some applications are demonstrated in detail.

Poster TUPYP022 [0.847 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP022

About •

Received ※ 30 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 12 April 2024

Cite •

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

TUPYP028

Thermal Analysis Software for Optical Elements of Hefei Advanced Light Facility*

software, optics, synchrotron, radiation

73

M.H. Lin, J. Chen, S.K. Jiang, Q.P. Wang, Z. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China

Thermal deformation is a key influencing factor in the surface shape of optical components for beamline optics. In the process of beamline design, it is necessary not only to select different cooling schemes based on thermal loading conditions but also to extensively optimize the parameters of these cooling schemes. The traditional approach for optimizing cooling scheme design often requires significant manual effort. By integrating existing experience in optimizing cooling scheme designs, this study transforms the parameterized design tasks that were originally performed manually into automated processes using software. This paper presents the latest advancements in the automated design software for cooling schemes of beamline optical components, and the results indicate that the optimization outcomes of the existing automated design software are close to those achieved through manual optimization.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP028

About •

Received ※ 01 November 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 03 December 2023

Cite •

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

WEPPP034

ALBA Experimental Set Up for the Evaluation of Thermal Contact Conductance Under Cryogenic and Vacuum Conditions

experiment, vacuum, cryogenics, synchrotron

199

O. Traver Ramos, J.J. Casas, C. Colldelram, J.L. Frieiro, B. Molas, M. Quispe, M. Sanchez
ALBA-CELLS, Cerdanyola del Vallès, Spain

The Thermal Contact Conductance (TCC) between two surfaces plays a very important role in the design of components in particle accelerators. The TCC depends on many variables such as surface finish, type of material, pressure, temperature, etc. As a general rule, the TCC comes from experimental results reported in the specialized literature. However, it is not always possible to find this information, especially if components are designed to operate in cryogenic and vacuum conditions, for this reason, assumptions are made that render results with high uncertainty. In this context, ALBA has designed an experimental set up to carry out axial heat flow steady state experiments for the evaluation of TCC under vacuum and cryogenic conditions. The minimum pressure achievable in the set up will be 1e-5 mbar while the temperature may vary between 80 and 300 K. The results will provide inputs to further optimize ALBA designs, including ALBA II, our ongoing fourth-generation synchrotron upgrade project. This paper describes the experimental setup, the thermal and mechanical design considerations and experimental validation tests.

Poster WEPPP034 [0.616 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP034

About •

Received ※ 30 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 05 April 2024

Cite •

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

WEPPP039

Data Preprocessing Method of High-Frequency Sampling XAFS Spectra Collected in a Novel Combined SAXS/XRD/XAFS Technique

detector, synchrotron, experiment, data-acquisition

207

Y.P. Liu, Z.J. Chen, G. Mo, Z.H. Wu
IHEP, Beijing, People’s Republic of China

High-frequency (HF) sampling X-ray absorption fine structure (XAFS) spectra with a time-resolution of ~8s were collected in our newly developed synchrotron radiation small-angle X-ray scattering (SAXS)/X-ray diffraction (XRD)/XAFS combined technique. Restoring the HF XAFS spectrum which contains hundreds of thousands to millions of data points to a normal XAFS spectrum consisting of hundreds of data points is a critical step for the subsequent neighbor structure analysis. Herein, the data preprocessing method and procedure of HF XAFS spectra were proposed according to the absorption edge of the standard sample and the rotation angular velocity of the monochromator. This work is expected to facilitate the potential applications of HF XAFS spectra in a time-resolved SAXS/XRD/XAFS experiment.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP039

About •

Received ※ 31 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 07 November 2023 — Issued ※ 18 May 2024

Cite •

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

THOAM02

SmarGon MCS2: An Enhanced Multi-Axis Goniometer with a New Control System

controls, operation, software, synchrotron

247

W. Glettig, D. Buntschu, E.H. Panepucci, M. Wang
PSI, Villigen PSI, Switzerland
A. Omelcenko
SmarAct, Oldenburg, Germany

As an improvement on the commercially available SmarGon multi-axis goniometer (SmarAct GmbH), the MX Group at the Paul Scherrer Institute (PSI) has been pursuing further development of the system. In addition to suggesting mechanical improvements to SmarAct to improve ruggedness and reliability, PSI has developed a brand-new and flexible control system for better customization, reliability and control. Calibration routines were implemented to reduce systemic errors, and the system has been tailored for practical beamline usage. SmarGon is a six degree-of-freedom positioning device, allowing positioning of a sample and orientation around any given point, with <5um sphere of confusion diameter. It was purpose-built for protein-crystallography experiments but, as will be presented here, was also re-purposed for other applications. Two devices have been in continuous 24/7 use for two years at the MX Beamlines PXI & PXII at SLS.

Slides THOAM02 [77.940 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THOAM02

About •

Received ※ 24 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 08 January 2024

Cite •

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

THPPP029

Technologies Concerning Metal Seals of the UHV System for Accelerators

vacuum, simulation, experiment, injection

322

H.Y. He, Y.S. Ma
IHEP, Beijing, People’s Republic of China
L. Liu, P.C. Wang
IHEP CSNS, Guangdong Province, People’s Republic of China
B. Tan
Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China

Reviewed the domestic research on structural design and sealing function principle of the metal seals, wildly used in the Ultra High Vacuum (UHV) system for accelerators. Analyzed and summarized the key technologies concerning the material, contact forms, machining process and test methods of sealing performance. The study will become the basis of designing, machining and quality measuring for the ultra-vacuum metal seals. It provided the foundation for generating seals standards to promote the development of vacuum technology application.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP029

About •

Received ※ 27 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 26 November 2023

Cite •

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

THPPP040

The Girder System Prototype for ALBA II Storage Ring

storage-ring, vacuum, GUI, lattice

335

L.R.M. Ribó, J.B. Boyer, C. Colldelram, N. González, L. Nikitina, F. Pérez
ALBA-CELLS, Cerdanyola del Vallès, Spain

The main goal of the upgrade of ALBA Synchrotron Light Facility into ALBA II is the transformation of the current accelerator into a diffraction limited storage ring, which implies the reduction of the emittance by at least a factor of twenty [1]. The upgrade will be executed before the end of the decade and will be profiting at maximum all existing ALBA infrastructures, in particular the building. The whole magnet layout of the lattice [2] has to be supported with a sequence of girders for their positioning with respect to another located in an adjacent girder with an accuracy of 50 µm to ensure the functionality of the accelerator. Besides the girders must enable the remote repositioning the magnets against the overall deformation of the site while ensuring the vibrational stability of the components on top. Easiness of assembling and installation of the different subsystems of the machine on top of the girder has to be considered also as a design requirement, in order to minimize the installation time. Two prototypes are planned to be built next year in order to check its full functionality
[1]ALBA II Accelerator Upgrade Project Status, IPAC¿23 proceedings
[2]Progress on the 6BA lattice for ALBAII, IPAC’23 proceedings

Poster THPPP040 [1.710 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP040

About •

Received ※ 25 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 26 November 2023

Cite •

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