SAP2023 - List of Authors (He, Y.)

Paper	Title	Page
MOAA01	Design of the Superconducting Linac for CiADS Facing High Reliability
	Y. He, W.L. Chen, W.P. Dou, G. Huang, H. Jia, S.H. Liu, Y.S. Qin, L.P. Sun, Z.J. Wang, J. Zhao IMP/CAS, Lanzhou, People’s Republic of China
	Funding: Supported by NSF U22A20261, Large Research Infrastructures - China initiative Accelerator Driven System CiADS is the world’s first Accelerator Driven System with a Mega-watt beam power. The linac of CiADS consists of a 500 MeV and 5 mA with five-family superconducting resonators located directly downstream of the Radio Frequency Quadrupole (RFQ). The most significant challenge in designing the superconducting linac for CiADS is to ensure high-reliability operation with minimal beam loss control at 10^-7 level and availability maximization through specifically designed hardware and software. In this presentation, we will discuss the physical design of the superconducting linac, including the fault compensation based on beam loss control and high reliability designs of the RF amplifier and power supply.
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TUPB001	Research on Electromagnetic Structure and Transverse Dynamics of RFQ accelerator over 700MHz
	W.P. Dou, L.Y. Gong, Y. He, C.X. Li, Z.J. Wang IMP/CAS, Lanzhou, People’s Republic of China
	The purpose of this research is to explore the dynamic and RF characteristics of RFQ with working frequency greater than 700 MHz, and to form a reliable RFQ physical design that meets the requirements of S-band linear accelerator injector. When the working frequency is increased to more than 700 MHz, the volume of RFQ will be reduced, but there will be many physical problems. The characteristics from 700MHz to 1.5GHz RFQ were studied on the beam dynamics. Based on the results of small acceptance RFQ commissioning, the design of the radial section and the control of beam loss were completed, and the RFQ design with a frequency of 750MHz was obtained with the energy of 2MeV, a length of 92.77cm, and an acceleration gradient of 2.15MV/m. The transmission efficiency is 94.4%. The RF characteristics from 700MHz to 1.5GHz RFQ were studied, and the RF design with a frequency of 750MHz was obtained, the power loss was 200W/mm, the Q₀ value was 7540, the flatness of the electric field was within ±2%, and the largest field asymmetry was 6.7%. We have designed, constructed, and cold-test the 750MHz cavity, the measured results are in agreement with simulated one.
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TUPB003	A Beam Splitting System for High Power CW Proton Beam
	Y.S. Qin, W.L. Chen, Y. He, Y.L. Huang, H. Jia IMP/CAS, Lanzhou, People’s Republic of China
	A novel method for splitting the high power, continuous wave (CW) proton beam in two or more branches with low losses has been developed. The aim of the beam splitting system (BSS) is to deliver up to 750 kW (150 MeV@5 mA) of proton beam to 6 terminals simultaneously. A three-step method is used, which includes cavity deflecting, quadrupoles focusing and septum magnets bending. The same method will be applied in isotope production devices for higher isotope production efficiency.
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TUPB012	Control of CAFe Beam Energy Using Linear Accelerator Simulation Software AVAS and Beam Line Calibration Technology	105
	C. Jin, C. Feng, Y. He, X. Qi, Z.J. Wang IMP/CAS, Lanzhou, People’s Republic of China
	A new accelerator simulation code named Advanced Virtual Accelerator Software (AVAS) was developed by the Institute of Modern Physics, Chinese Academy of Science. Although the code is proposed to simulate the particle transport in the linac of the China Initiative Accelerator Driven System (CiADS), it can be also used for common linacs. We have constructed a framework for the accelerator simulation program AVAS based on the structure, function, parameters, errors, and operational logic of real accelerators. The mapping relationship between the operating parame-ters and simulation parameters of the Chinese ADS Front-end Demo Linac (CAFe) superconducting sec-tion was successfully established through AVAS. In the testing experiment, AVAS successfully set the operat-ing parameters of the CAFe superconducting section, and the deviation between the energy setting value and the actual measurement value was about 0.5%.
DOI •	reference for this paper ※ doi:10.18429/JACoW-SAP2023-TUPB012
About •	Received ※ 30 June 2023 — Revised ※ 09 July 2023 — Accepted ※ 11 July 2023 — Issued ※ 24 March 2024
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Paper

Title

Page

MOAA01

Design of the Superconducting Linac for CiADS Facing High Reliability

Y. He, W.L. Chen, W.P. Dou, G. Huang, H. Jia, S.H. Liu, Y.S. Qin, L.P. Sun, Z.J. Wang, J. Zhao
IMP/CAS, Lanzhou, People’s Republic of China

Funding: Supported by NSF U22A20261, Large Research Infrastructures - China initiative Accelerator Driven System
CiADS is the world’s first Accelerator Driven System with a Mega-watt beam power. The linac of CiADS consists of a 500 MeV and 5 mA with five-family superconducting resonators located directly downstream of the Radio Frequency Quadrupole (RFQ). The most significant challenge in designing the superconducting linac for CiADS is to ensure high-reliability operation with minimal beam loss control at 10^-7 level and availability maximization through specifically designed hardware and software. In this presentation, we will discuss the physical design of the superconducting linac, including the fault compensation based on beam loss control and high reliability designs of the RF amplifier and power supply.

Cite •

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

TUPB001

Research on Electromagnetic Structure and Transverse Dynamics of RFQ accelerator over 700MHz

W.P. Dou, L.Y. Gong, Y. He, C.X. Li, Z.J. Wang
IMP/CAS, Lanzhou, People’s Republic of China

The purpose of this research is to explore the dynamic and RF characteristics of RFQ with working frequency greater than 700 MHz, and to form a reliable RFQ physical design that meets the requirements of S-band linear accelerator injector. When the working frequency is increased to more than 700 MHz, the volume of RFQ will be reduced, but there will be many physical problems. The characteristics from 700MHz to 1.5GHz RFQ were studied on the beam dynamics. Based on the results of small acceptance RFQ commissioning, the design of the radial section and the control of beam loss were completed, and the RFQ design with a frequency of 750MHz was obtained with the energy of 2MeV, a length of 92.77cm, and an acceleration gradient of 2.15MV/m. The transmission efficiency is 94.4%. The RF characteristics from 700MHz to 1.5GHz RFQ were studied, and the RF design with a frequency of 750MHz was obtained, the power loss was 200W/mm, the Q₀ value was 7540, the flatness of the electric field was within ±2%, and the largest field asymmetry was 6.7%. We have designed, constructed, and cold-test the 750MHz cavity, the measured results are in agreement with simulated one.

Cite •

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

TUPB003

A Beam Splitting System for High Power CW Proton Beam

Y.S. Qin, W.L. Chen, Y. He, Y.L. Huang, H. Jia
IMP/CAS, Lanzhou, People’s Republic of China

A novel method for splitting the high power, continuous wave (CW) proton beam in two or more branches with low losses has been developed. The aim of the beam splitting system (BSS) is to deliver up to 750 kW (150 MeV@5 mA) of proton beam to 6 terminals simultaneously. A three-step method is used, which includes cavity deflecting, quadrupoles focusing and septum magnets bending. The same method will be applied in isotope production devices for higher isotope production efficiency.

Cite •

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

TUPB012

Control of CAFe Beam Energy Using Linear Accelerator Simulation Software AVAS and Beam Line Calibration Technology

105

C. Jin, C. Feng, Y. He, X. Qi, Z.J. Wang
IMP/CAS, Lanzhou, People’s Republic of China

A new accelerator simulation code named Advanced Virtual Accelerator Software (AVAS) was developed by the Institute of Modern Physics, Chinese Academy of Science. Although the code is proposed to simulate the particle transport in the linac of the China Initiative Accelerator Driven System (CiADS), it can be also used for common linacs. We have constructed a framework for the accelerator simulation program AVAS based on the structure, function, parameters, errors, and operational logic of real accelerators. The mapping relationship between the operating parame-ters and simulation parameters of the Chinese ADS Front-end Demo Linac (CAFe) superconducting sec-tion was successfully established through AVAS. In the testing experiment, AVAS successfully set the operat-ing parameters of the CAFe superconducting section, and the deviation between the energy setting value and the actual measurement value was about 0.5%.

DOI •

reference for this paper ※ doi:10.18429/JACoW-SAP2023-TUPB012

About •

Received ※ 30 June 2023 — Revised ※ 09 July 2023 — Accepted ※ 11 July 2023 — Issued ※ 24 March 2024

Cite •

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