CYCLOTRONS2022 - List of Authors (Bian, T.J.)

Paper	Title	Page
MOPO009	Study on the Extraction of a Compact Cyclotron for BNCT	73
	L.Y. Ji, S. An, T.J. Bian, F.P. Guan, S.M. Wei, H.D. Xie, J.S. Xing CIAE, Beijing, People’s Republic of China
	An 18 MeV, 1 mA H⁻ compact cyclotron is under design at China Institute of Atomic Energy (CIAE). The proton beam bombards a beryllium target, producing high-flux neutron beam for Boron Neutron Capture Therapy (BNCT). Stripping extraction is adopted in this cyclotron. The position of the stripping point affects the trajectory and beam quality of the extracted beam. In this paper, we use orbit-tracking method to simulate the beam trajectory and emittance with different positions and tilt angles of stripping foil, and adopt the extraction point whose radius is 53.6 cm, azimuth is 57° and the tilt angle of the stripping foil is 15°.
	Poster MOPO009 [1.696 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO009
About •	Received ※ 31 December 2022 — Revised ※ 28 January 2023 — Accepted ※ 09 February 2023 — Issue date ※ 07 March 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPO001	Field Matching of F-D-F, Gap Shaping Magnets for a 2 GeV CW FFA	200
	W.F. Fu, T.J. Bian, C. Wang, S.P. Zhang, T.J. Zhang, H. Zhou, X.F. Zhu CIAE, Beijing, People’s Republic of China
	Funding: Work supported by the National Natural Science Foundation of China under Grant 12135020 and the basic research fund from the Ministry of Finance of China under Grant BRF201901. Fixed Field Alternating Gradient Accelerators have been developed for decades. A continuous wave (CW) 2 GeV FFA which aims at high-power proton beam applications is under developing in China Institute of Atomic Energy (CIAE). To avoid dangerous resonance lines and manipulate the tune diagram flexibly, 3rd order magnetic field is applied along the radius and 10-fold symmetrical F-D-F scheme has been proved to be feasible. In this paper, Integral Equation Method (IEM) is introduced and shown more efficient than adjusting the variable gap manually, saving time for magnet design. First of all, the radial mean field is set as a main design goal and the Δ H at different radii is solved by linear equations based on IEM. The isochronism is done when the mean field is well matched with the design value, whereas some precise corrections are needed for the oscillating frequency Vr and Vz, such as fringe field effects and multipole components near the end of pole face. The tune shift caused by fringe field is also included in this paper. Fringe field is more crucial for HTS magnets especially, since the leaked field of superconducting coil is ~1 kGs. Considering that, we apply an angular matching method to compensate the tune shift by fringe field.
	Poster WEPO001 [3.442 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-WEPO001
About •	Received ※ 30 December 2022 — Revised ※ 28 January 2023 — Accepted ※ 09 February 2023 — Issue date ※ 12 June 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRAO02	Feasibility Study on 10 MW-Class Ultra-High Power Cyclotron	359
	T.J. Bian, S. An, F.P. Guan, L.Y. Ji, S.M. Wei CIAE, Beijing, People’s Republic of China
	10MW-class ultra-high power cyclotron (UHPC) has great application prospects in cutting-edge sciences, neutron source, advanced energy and advanced material, etc. So far, Cyclotron with average beam power of 10 MW still have some bottleneck problems. Beam energy and current of a high-power cyclotron is typically less than 800MeV and 3mA. In this paper, bottleneck problems of UHPC are analysed, and then a preliminary design of UHPC-10MW is presented.
	Slides FRAO02 [15.273 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-FRAO02
About •	Received ※ 31 December 2022 — Revised ※ 12 January 2023 — Accepted ※ 07 July 2023 — Issue date ※ 20 July 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Study on the Extraction of a Compact Cyclotron for BNCT

73

L.Y. Ji, S. An, T.J. Bian, F.P. Guan, S.M. Wei, H.D. Xie, J.S. Xing
CIAE, Beijing, People’s Republic of China

An 18 MeV, 1 mA H⁻ compact cyclotron is under design at China Institute of Atomic Energy (CIAE). The proton beam bombards a beryllium target, producing high-flux neutron beam for Boron Neutron Capture Therapy (BNCT). Stripping extraction is adopted in this cyclotron. The position of the stripping point affects the trajectory and beam quality of the extracted beam. In this paper, we use orbit-tracking method to simulate the beam trajectory and emittance with different positions and tilt angles of stripping foil, and adopt the extraction point whose radius is 53.6 cm, azimuth is 57° and the tilt angle of the stripping foil is 15°.

Poster MOPO009 [1.696 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO009

About •

Received ※ 31 December 2022 — Revised ※ 28 January 2023 — Accepted ※ 09 February 2023 — Issue date ※ 07 March 2023

Cite •

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

WEPO001

Field Matching of F-D-F, Gap Shaping Magnets for a 2 GeV CW FFA

200

W.F. Fu, T.J. Bian, C. Wang, S.P. Zhang, T.J. Zhang, H. Zhou, X.F. Zhu
CIAE, Beijing, People’s Republic of China

Funding: Work supported by the National Natural Science Foundation of China under Grant 12135020 and the basic research fund from the Ministry of Finance of China under Grant BRF201901.
Fixed Field Alternating Gradient Accelerators have been developed for decades. A continuous wave (CW) 2 GeV FFA which aims at high-power proton beam applications is under developing in China Institute of Atomic Energy (CIAE). To avoid dangerous resonance lines and manipulate the tune diagram flexibly, 3rd order magnetic field is applied along the radius and 10-fold symmetrical F-D-F scheme has been proved to be feasible. In this paper, Integral Equation Method (IEM) is introduced and shown more efficient than adjusting the variable gap manually, saving time for magnet design. First of all, the radial mean field is set as a main design goal and the Δ H at different radii is solved by linear equations based on IEM. The isochronism is done when the mean field is well matched with the design value, whereas some precise corrections are needed for the oscillating frequency Vr and Vz, such as fringe field effects and multipole components near the end of pole face. The tune shift caused by fringe field is also included in this paper. Fringe field is more crucial for HTS magnets especially, since the leaked field of superconducting coil is ~1 kGs. Considering that, we apply an angular matching method to compensate the tune shift by fringe field.

Poster WEPO001 [3.442 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-WEPO001

About •

Received ※ 30 December 2022 — Revised ※ 28 January 2023 — Accepted ※ 09 February 2023 — Issue date ※ 12 June 2023

Cite •

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

FRAO02

Feasibility Study on 10 MW-Class Ultra-High Power Cyclotron

359

T.J. Bian, S. An, F.P. Guan, L.Y. Ji, S.M. Wei
CIAE, Beijing, People’s Republic of China

10MW-class ultra-high power cyclotron (UHPC) has great application prospects in cutting-edge sciences, neutron source, advanced energy and advanced material, etc. So far, Cyclotron with average beam power of 10 MW still have some bottleneck problems. Beam energy and current of a high-power cyclotron is typically less than 800MeV and 3mA. In this paper, bottleneck problems of UHPC are analysed, and then a preliminary design of UHPC-10MW is presented.

Slides FRAO02 [15.273 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-FRAO02

About •

Received ※ 31 December 2022 — Revised ※ 12 January 2023 — Accepted ※ 07 July 2023 — Issue date ※ 20 July 2023

Cite •

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