IMP/CAS, Lanzhou, People’s Republic of China
IMP/CAS, Lanzhou, People’s Republic of China
FRBO02
IMP/CAS, Lanzhou, People’s Republic of China
| Paper | Title | Page |
|---|---|---|
| MOPO003 | Sawtooth Wave Buncher Upgrade for SFC Cyclotron | 51 |
|
||
| To increase extracted beam intensity, the SFC cyclotron requires that the sawtooth wave buncher on its injection line provide the effective voltage up to 2.5kV and cover a wide frequency range of six times. We develope a multi-harmonic synthesis method by combining a broadband amplifier and impedance transformer, which provide a high-voltage single-gap buncher at limited space and cost. With this method, the maximum voltage of the new buncher exceeds 2.5kV and the beam intensity increases by a factor of 6.7. | ||
|
|
Poster MOPO003 [1.092 MB] | |
| DOI • | reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO003 | |
| About • | Received ※ 04 December 2022 — Revised ※ 12 February 2023 — Accepted ※ 22 February 2023 — Issue date ※ 25 August 2023 | |
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
| THBI02 | Status Report on the Cyclotron Injector for HIMM | 269 |
|
||
| HIMM (Heavy Ion Medical Machine) is an accelerator complex designed by Institute of Modern Physics, CAS, which accelerates carbon ions to the energy 400 MeV/A for tumor therapy. The main accelerator of HIMM is a synchronous accelerator. As a special design, we use a cyclotron as the injector of the synchrontron. The cyclotron is a compact cyclotron to accelerate C125+ ions to the energy 6.8 MeV/A, and the extracted beam intensity of the cyclotron is 10 eµA. For stability and simplicity operation, we use two identical permanent magnet ECR ion sources in the axial injection line, that the ion sources can interchange with each other rapidly with the same performance, and only one main exciting coil with no trim coils in the cyclotron magnet. Up to now, three cyclotrons have been accomplished, one of them was operated in Gansu Wuwei Tumor Hospital to treat more than six hundred cancer patients in the last two and a half years, the other one had been fully commissioned in Lanzhou Heavy Ion Hospital about two years ago. After a short introduction to the heavy ion cancer treatment facility development in China, this paper will present operation status of the cyclotrons for HIMM. Typical performance and on-line operation reliability will be discussed. | ||
|
|
Slides THBI02 [2.031 MB] | |
| DOI • | reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-THBI02 | |
| About • | Received ※ 07 December 2022 — Revised ※ 24 July 2023 — Accepted ※ 03 August 2023 — Issue date ※ 13 October 2023 | |
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |
FRBO02 |
Simulation Study of Inflector for High Intensity Ion Beam Injection | |
|
||
| Compact cyclotron for isotope production has received wide attention around the world, especially those of high beam intensity. When ion beam enters the cyclotron acceleration system, it needs to pass through the spiral inflector in the axial injection system to deflect the beam by 90° to make it reach the acceleration plane. However, the space charge effect and beam loss that occur in the high-current compact cyclotron make the design of the spiral inflector a big challenge. We used CST and COMSOL to simulate the injection of H2+ particles with an energy of 80 keV into a compact cyclotron from RFQ. Python was used to calculate the spiral inflector model data, and the VBA module of CST was used to establish the 3D mirror model. This will provide a reliable solution for the design and optimization of high-current compact cyclotron. | ||
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |