MEDSI2023 - Table of Session: WEOAM (Core Technology Developments)

Paper	Title	Page
WEOAM01	High-Throughput Data Orchestration and Streaming System for High Energy Photon Source
	C.L. Zhang IHEP, People’s Republic of China
	The forthcoming fourth-generation light source, the High Energy Photon Source (HEPS), is expected to generate a massive amount of data with a throughput estimated at hundreds of terabytes per day. With the advancement of synchrotron radiation technology and experimental methodologies, the data transmission pipeline has become increasingly complex, evolving from a simple detector-to-storage single-channel in the past to a complex network with multiple data generators and applications. In order to ensure a favorable experimental experience, effective data management and distribution are essential. In response to these challenges, Mamba Data Worker (MDW) has been developed, which serves the primary functions of real-time detector data acquisition, interaction with multi-terminal dataflow, metadata extraction, online assembly and writing, and light weight online data processing. This work presents the design and development plan of MDW, outlines the essential technologies involved, and illustrates its current application at the Beijing Synchrotron Radiation Facility (BSRF).
	Slides WEOAM01 [65.711 MB]
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WEOAM02	A Vacuum Aspirated Cryo Cooling System (VACCS)	121
	G.M.A. Duller, D.L. Magrath, M. Nagy, B. Olafssonpresenter DLS, Oxfordshire, United Kingdom
	The use of liquid nitrogen for cooling of synchrotron equipment is widespread. The cryogenic sub-coolers commonly employed come with some significant drawbacks such as cost, complexity, stiffness of distribution lines, and vibration induced by pressure variations. The typical sub-cooler is capable of handling 2-3kW of absorbed power whilst many optics require no more than 50-150W of cooling. We present a Vacuum Aspirated Cryo-cooling System (VACCS) which overcomes many of these disadvantages and which allows cryo-cooling to be implemented more widely. The VACCS system uses a vacuum, generated with no moving parts, to draw LN2 through a heat exchanger. Thus the system does not have to be pressure rated. We describe our designs for highly flexible distribution lines. A simple control system offers variable temperature at the heat exchanger by varying the flowrate of LN2. A system is installed at Diamond which allows the independent control of three zones. A test rig has demonstrated cooling capacity in excess of 100W for a monochromator crystal assembly and controlled temperatures -194¿-120C.
	Slides WEOAM02 [21.578 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOAM02
About •	Received ※ 31 October 2023 — Revised ※ 27 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 January 2024
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WEOAM03	Magnetic Levitation on a Budget: A Student Discount	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
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WEOAM04	Development of Low-Frequency Superconducting Cavities for High Energy Photon Source	129
	X.Y. Zhang, J. Dai, L. Guo, Q. Ma, F. Meng, P. Zhang, H.J. Zheng IHEP, Beijing, People’s Republic of China
	Funding: This work was supported in part by High Energy Photon Source, and in part by the National Natural Science Foundation of China under Grant 12005241. A low-frequency superconducting cavity is one of the most critical devices in the High Energy Photon Source (HEPS), a 6 GeV diffraction-limited synchrotron light source under construction in Beijing. A higher-order-mode (HOM) damped 166.6 MHz ß=1 quarter-wave superconducting cavity, first of its kind in the world, has been designed by the Institute of High Energy Physics. Compact structure, excellent electromagnetic and mechanical properties and manufacturability were realized. Mounted with a forward power coupler, a tuner, two thermal break beam tubes, a collimating taper transition, two gate valves and some shielded bellows, the dressed cavity was then assembled into a cryomodule. Two cryomodules were later required to fit into HEPS straight sections with a length limitation of 6 meters, which posed a significant challenge for the design of the cavity string. The success of the horizontal test also verifies the design of the cavity string. This article presents the design, fabrication, post-processing, system integration, and cryogenic tests of the first HOM-damped compact 166.6 MHz superconducting cavity module.
	Slides WEOAM04 [23.093 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOAM04
About •	Received ※ 25 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 December 2023
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WEOAM05	Zero-Length Conflat Flange Nonevaporable Getter (NEG) Pump Manufactured by Oxygen-Free Pd/Ti Deposition
	K. Mase, T. Kikuchi KEK, Tsukuba, Japan S. Ohno Yokohama National University, Yokohama, Japan M. Ono, I. Yoshikawa, K. Yoshioka University of Tokyo, Kashiwa, Japan Y. Sato Yokohama National University, Graduate School of Engineering Science, Yokohama, Japan
	Funding: This work was supported by KAKENHI (JP17K05067, JP19K05280, 22K04937), TIA-Kakehashi grants (TK18-014, TK19-035) and Takahashi Industrial Economic Research Foundation research grant (08-003-172). Nonevaporable getter (NEG) pumps are widely used to maintain ultrahigh vacuum (UHV). Commercial NEG pumps using ZrVFe alloy can be activated by heating at 400¿500 °C, and pump active residual gases such as H₂, H₂O, CO₂, CO, N₂, and so on at room temperature (RT).* Recently T. Miyazawa, T. Kikuchi, K. Mase et al. have developed a new NEG, Pd overcoated on Ti thin film with a purity higher than 99.95% (oxygen-free Pd/Ti hereafter), which pumps H₂ and CO at RT after baking at 133 °C for 12 hours. Then we developed a zero-length conflat flange NEG pump deposited with oxygen-free Pd/Ti.* The NEG pump can be fully activated by baking at 150 °C for 12 h and exhibits initial pumping speeds of 2340 L s¿1 for H₂, and 1440 L s¿1 for CO. The initial pumping speeds of the oxygen-free Pd/Ti thin film after baking at 150 °C were estimated to be 3.2 L s¿1 cm¿2 for H₂ and 7.6 L s¿1 cm¿2 for CO. The present NEG pump is ideal for maintaining UHV below 10¿8 Pa, because its pumping speeds for H₂ and CO are quite large, and because it can be fully activated by baking at 150 °C for 12 h. E. Maccallini et al., AIP Conf. Proc. 1451, 24 (2012). T. Miyazawa et al., J. Vac. Sci. Technol. A 36, 051601 (2018). **Y. Sato et al., Vacuum 212, 112004 (2023).
	Slides WEOAM05 [4.071 MB]
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Paper

Title

Page

WEOAM01

High-Throughput Data Orchestration and Streaming System for High Energy Photon Source

C.L. Zhang
IHEP, People’s Republic of China

The forthcoming fourth-generation light source, the High Energy Photon Source (HEPS), is expected to generate a massive amount of data with a throughput estimated at hundreds of terabytes per day. With the advancement of synchrotron radiation technology and experimental methodologies, the data transmission pipeline has become increasingly complex, evolving from a simple detector-to-storage single-channel in the past to a complex network with multiple data generators and applications. In order to ensure a favorable experimental experience, effective data management and distribution are essential. In response to these challenges, Mamba Data Worker (MDW) has been developed, which serves the primary functions of real-time detector data acquisition, interaction with multi-terminal dataflow, metadata extraction, online assembly and writing, and light weight online data processing. This work presents the design and development plan of MDW, outlines the essential technologies involved, and illustrates its current application at the Beijing Synchrotron Radiation Facility (BSRF).

Slides WEOAM01 [65.711 MB]

Cite •

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

WEOAM02

A Vacuum Aspirated Cryo Cooling System (VACCS)

121

G.M.A. Duller, D.L. Magrath, M. Nagy, B. Olafssonpresenter
DLS, Oxfordshire, United Kingdom

The use of liquid nitrogen for cooling of synchrotron equipment is widespread. The cryogenic sub-coolers commonly employed come with some significant drawbacks such as cost, complexity, stiffness of distribution lines, and vibration induced by pressure variations. The typical sub-cooler is capable of handling 2-3kW of absorbed power whilst many optics require no more than 50-150W of cooling. We present a Vacuum Aspirated Cryo-cooling System (VACCS) which overcomes many of these disadvantages and which allows cryo-cooling to be implemented more widely. The VACCS system uses a vacuum, generated with no moving parts, to draw LN2 through a heat exchanger. Thus the system does not have to be pressure rated. We describe our designs for highly flexible distribution lines. A simple control system offers variable temperature at the heat exchanger by varying the flowrate of LN2. A system is installed at Diamond which allows the independent control of three zones. A test rig has demonstrated cooling capacity in excess of 100W for a monochromator crystal assembly and controlled temperatures -194¿-120C.

Slides WEOAM02 [21.578 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOAM02

About •

Received ※ 31 October 2023 — Revised ※ 27 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 08 January 2024

Cite •

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

WEOAM03

Magnetic Levitation on a Budget: A Student Discount

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)

WEOAM04

Development of Low-Frequency Superconducting Cavities for High Energy Photon Source

129

X.Y. Zhang, J. Dai, L. Guo, Q. Ma, F. Meng, P. Zhang, H.J. Zheng
IHEP, Beijing, People’s Republic of China

Funding: This work was supported in part by High Energy Photon Source, and in part by the National Natural Science Foundation of China under Grant 12005241.
A low-frequency superconducting cavity is one of the most critical devices in the High Energy Photon Source (HEPS), a 6 GeV diffraction-limited synchrotron light source under construction in Beijing. A higher-order-mode (HOM) damped 166.6 MHz ß=1 quarter-wave superconducting cavity, first of its kind in the world, has been designed by the Institute of High Energy Physics. Compact structure, excellent electromagnetic and mechanical properties and manufacturability were realized. Mounted with a forward power coupler, a tuner, two thermal break beam tubes, a collimating taper transition, two gate valves and some shielded bellows, the dressed cavity was then assembled into a cryomodule. Two cryomodules were later required to fit into HEPS straight sections with a length limitation of 6 meters, which posed a significant challenge for the design of the cavity string. The success of the horizontal test also verifies the design of the cavity string. This article presents the design, fabrication, post-processing, system integration, and cryogenic tests of the first HOM-damped compact 166.6 MHz superconducting cavity module.

Slides WEOAM04 [23.093 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEOAM04

About •

Received ※ 25 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 December 2023

Cite •

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

WEOAM05

Zero-Length Conflat Flange Nonevaporable Getter (NEG) Pump Manufactured by Oxygen-Free Pd/Ti Deposition

K. Mase, T. Kikuchi
KEK, Tsukuba, Japan
S. Ohno
Yokohama National University, Yokohama, Japan
M. Ono, I. Yoshikawa, K. Yoshioka
University of Tokyo, Kashiwa, Japan
Y. Sato
Yokohama National University, Graduate School of Engineering Science, Yokohama, Japan

Funding: This work was supported by KAKENHI (JP17K05067, JP19K05280, 22K04937), TIA-Kakehashi grants (TK18-014, TK19-035) and Takahashi Industrial Economic Research Foundation research grant (08-003-172).
Nonevaporable getter (NEG) pumps are widely used to maintain ultrahigh vacuum (UHV). Commercial NEG pumps using ZrVFe alloy can be activated by heating at 400¿500 °C, and pump active residual gases such as H₂, H₂O, CO₂, CO, N₂, and so on at room temperature (RT).* Recently T. Miyazawa, T. Kikuchi, K. Mase et al. have developed a new NEG, Pd overcoated on Ti thin film with a purity higher than 99.95% (oxygen-free Pd/Ti hereafter), which pumps H₂ and CO at RT after baking at 133 °C for 12 hours.** Then we developed a zero-length conflat flange NEG pump deposited with oxygen-free Pd/Ti.*** The NEG pump can be fully activated by baking at 150 °C for 12 h and exhibits initial pumping speeds of 2340 L s¿1 for H₂, and 1440 L s¿1 for CO. The initial pumping speeds of the oxygen-free Pd/Ti thin film after baking at 150 °C were estimated to be 3.2 L s¿1 cm¿2 for H₂ and 7.6 L s¿1 cm¿2 for CO. The present NEG pump is ideal for maintaining UHV below 10¿8 Pa, because its pumping speeds for H₂ and CO are quite large, and because it can be fully activated by baking at 150 °C for 12 h.
*E. Maccallini et al., AIP Conf. Proc. 1451, 24 (2012).
**T. Miyazawa et al., J. Vac. Sci. Technol. A 36, 051601 (2018).
***Y. Sato et al., Vacuum 212, 112004 (2023).

Slides WEOAM05 [4.071 MB]

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