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MOA1 |
High intensity highly charged ion beams production and operation at IMP |
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- L.T. Sun, B.M. Wu, C. Qian, E.M. Mei, H.W. Zhao, J.B. Li, J.D. Ma, L. Zhu, L.B. Li, L.X. Li, S.J. Zheng, W. Lu, W. Wu, W.H. Zhang, X.J. Ou, X.Z. Zhang, Y.C. Feng
IMP/CAS, Lanzhou, People’s Republic of China
- X. Wang
PSI, Villigen PSI, Switzerland
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Funding: National Natural Science Foundation of China (Grant Nos. 12025506, 11427904)
Charged by the existing operation facility HIRFL and HIAF one of the next generation heavy ion facilities under construction, high intensity high-charge state heavy ion beams production is in the high priority of research and development. For this purpose, several high performance ECR ion sources have been successively developed and put in routine operation. The recently developed FECR or the First 4th generation ECR ion source has employed the cutting-edge technologies for the development of a hybrid superconducting magnet using Nb₃Sn and NbTi superconductors. Operating at 28-45 GHz, FECR will give its first plasma and intense beam production. Other than ion sources development, new technologies development and new insights into high performance ECR ion source have led to increasingly ion beam intensities increase in both cw or pulsed modes. In this talk, high performance ion source development will be presented. A general review of the recent high intensity ion beam production progress at IMP and the routine operation for heavy ion accelerators will be made.
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Slides MOA1 [9.880 MB]
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MOC3 |
Challenges in production of intense metallic ion beams at IMP |
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- W. Lu, C. Qian, H.W. Zhao, H.Y. Ma, L.T. Sun, L.B. Li, L.X. Li, X.Z. Zhang, Y.C. Feng
IMP/CAS, Lanzhou, People’s Republic of China
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Since the development of inductive heating oven in 2019 [1], several intense highly charged metallic ion beams have been produced for different requirements at IMP (Institute of Modern Physics). According to the material characteristics, we used different forms of metal materials, including metal elements (Cr, Mn, Ni, Fe), oxides (UO₂), fluoride or iodide (ZrF₄, SrF₂, CsI), etc. Detail experiments setup and testing results will be presented in this contribution.
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MOP02 |
Intense pulsed uranium ion beams production with ECRISs |
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- L.X. Li, J.B. Li, J.D. Ma, W.H. Zhang, Y.C. Feng, D. Hitz, H.Y. Ma, W. Lu, L.T. Sun, H.W. Zhao
IMP/CAS, Lanzhou, People’s Republic of China
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Intense pulsed uranium ion beam production is essential for heavy ion accelerators (especially for synchrotrons) in operation and those under construction. Although metallic beam production is tricky, based on our earlier study, intense uranium beams can be expected when operating a electron cyclotron resonance (ECR) ion source especially in afterglow mode. In this study, we aim to produce intense uranium beams with LECR4 and SECRAL-II (Superconducting ECR ion source with Advanced design in Lanzhou No. II) ion sources in afterglow modes. The experimental results will be reported in this presentation.
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| TUP01 |
Operation with the LAPECR3 ion sources for cancer therapy accelerators |
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- J.Q. Li, C. Qian, J.D. Ma, L.T. Sun, X.Z. Zhang, H.W. Zhao, Y. Cao
IMP/CAS, Lanzhou, People’s Republic of China
- H.W. Zhao
UCAS, Beijing, People’s Republic of China
- G. Jin
LANITH, Lanzhou, People’s Republic of China
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An all-permanent magnet electron cyclotron resonance ion source-LAPECR3 (Lanzhou All Permanent magnet Electron Cyclotron Resonance ion source No.3) had been developed as the C⁵⁺ ion beam injector of Heavy Ion Medical Machine (HIMM) accelerator facility since 2009 in China. The first HIMM demo facility was built in Wuwei city in 2015, which had been officially licensed to treat patients in early 2020. The facility has been proven to be very effective, and more than 1000 patients have been treated so far. In order to prevent ion source failure, each facility employs two identical LAPECR3 ion sources to supply C⁵⁺ beam. At present, there are eight HIMM facilities under construction or in operation, and more than 16 LAPECR3 ion sources have been built. In order to improve the performance of the ion source for long term operation, some techniques were employed to optimize source performance and to avoid the damage of key equipment. This paper will introduce the operation status of LAPECR ion sources at these HIMM facilities and present the latest results of carbon beam production.
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Poster TUP01 [1.475 MB]
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| DOI • |
reference for this paper
※ doi:10.18429/JACoW-ECRIS2024-TUP01
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| About • |
Received ※ 10 September 2024 — Revised ※ 14 September 2024 — Accepted ※ 27 May 2025 — Issued ※ 26 June 2025 |
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TUP02 |
An electrostatic ion beam transport system for intense proton source |
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- Q. Wu, L.T. Sun, H.W. Zhao, Y.G. Liu
IMP/CAS, Lanzhou, People’s Republic of China
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The Ion Source Group has undertaken a R&D project of a compact low energy injector. The project is the development of an intense proton source and low energy beam (LEBT) for a transportable neutron source. The specific characteristics of the injector are low power consumption, compact and low beam emittance. An electrostatic low energy beam transport with a double Einzel-Lens setup is used to deliver 30 keV H⁺ beam to the entrance of a 2.5 MeV RFQ. A 2.45 GHz ECR ion source was adopted to provide 15 emA H⁺, H₂⁺ and H₃⁺ beams with a duty factor of 3 %. The fabrication, assembly and beam commissioning have been completed at IMP. The injector composed the 2.45 GHz ECR ion source and its LEBT was very compact, with a length of 900 mm. The beam current at the LEBT exit was about 16 mA with a pulse length of 300 μs and a repetition frequency of 50 Hz. In this paper, the studies of beam intensities, beam transmission efficiency in LEBT, beam emittance and mismatch factor are presented and discussed.
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THA1 |
High performance highly-charged ECR ion sources and matching with high-intensity heavy ion accelerator facility |
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- H.W. Zhao, L.T. Sun
IMP/CAS, Lanzhou, People’s Republic of China
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Five ECR ion sources operating at 18-45 GHz microwave frequency are being operated or under commissioning to deliver highly-charged ion beams for high-intensity heavy ion cyclotron and linac accelerators at IMP in order to meet different requirements from the accelerators and physics experiments. One of the key issues for the ECRIS and accelerator physicists is how to match the highly-charged ECR ion sources with the accelerators and maximize performance of the accelerators from the point of view of beam intensities, charge states and costs. This paper will discuss how a highly-charged ECR ion source could match with a high-intensity heavy ion accelerator performance cost effectively on the basis of our operation experiences with the five ECR ion sources and the accelerators. If a new high-intensity heavy ion cyclotron or linac would be designed and built, performance and cost can be compared in detail for the cyclotron with an ECR ion source delivering Xe²⁰⁺ and Xe³⁵⁺, and for the linac with an ECR ion source delivering U³⁵⁺ and U⁵⁵⁺. Finally, it has been demonstrated that development of a highly-charged ECR ion source producing intense beams is more performance-cost-effective for a high-intensity heavy ion accelerator.
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Slides THA1 [5.431 MB]
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