CYCLOTRONS2022 - List of Keywords (magnet-design)

Paper	Title	Other Keywords	Page
MOPO018	The Magnetic Field Design of a 16 MeV Variable Energy Cyclotron	cyclotron, extraction, simulation, resonance	103
	Z. Wu, K.Z. Ding, J. Zhou ASIPP, Hefei, People’s Republic of China S. Xu HFCIM, HeFei, People’s Republic of China
	The development of a 16 MeV H⁻ cyclotron is in progress at CIM company (Hefei, China). Such machine is designed for radio-isotope production which is used for nuclear medicine. Beam extraction is ensured by means of stripper foils located at different radii to achieve variable extraction energy between 10 and 16 MeV. In this paper, the main magnet design was demonstrated in detail. An AVF magnet with four radial sectors was adopt to get strong axial focusing. The hill angular widths and hill gaps with radius were designed to meet the isochronous magnetic field. The tunes were optimized to avoid dangerous resonance. The result of magnet design was verified by beam dynamics simulations. After the presentation of the magnet design, some results on stripping extraction were also discussed. TOSCA (OPERA-3D) was used to perform 3D magnetic field simulation. An efficient beam simulation code developed by MATLAB was used to do beam dynamics simulations.
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO018
About •	Received ※ 12 February 2023 — Revised ※ 13 February 2023 — Accepted ※ 14 February 2023 — Issue date ※ 10 May 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPO018

The Magnetic Field Design of a 16 MeV Variable Energy Cyclotron

cyclotron, extraction, simulation, resonance

103

Z. Wu, K.Z. Ding, J. Zhou
ASIPP, Hefei, People’s Republic of China
S. Xu
HFCIM, HeFei, People’s Republic of China

The development of a 16 MeV H⁻ cyclotron is in progress at CIM company (Hefei, China). Such machine is designed for radio-isotope production which is used for nuclear medicine. Beam extraction is ensured by means of stripper foils located at different radii to achieve variable extraction energy between 10 and 16 MeV. In this paper, the main magnet design was demonstrated in detail. An AVF magnet with four radial sectors was adopt to get strong axial focusing. The hill angular widths and hill gaps with radius were designed to meet the isochronous magnetic field. The tunes were optimized to avoid dangerous resonance. The result of magnet design was verified by beam dynamics simulations. After the presentation of the magnet design, some results on stripping extraction were also discussed. TOSCA (OPERA-3D) was used to perform 3D magnetic field simulation. An efficient beam simulation code developed by MATLAB was used to do beam dynamics simulations.

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO018

About •

Received ※ 12 February 2023 — Revised ※ 13 February 2023 — Accepted ※ 14 February 2023 — Issue date ※ 10 May 2023

Cite •

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