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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2507.03155 |
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| _version_ | 1866918082972221440 |
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| author | Winklehner, Daniel Engebretson, Samuel Moon, Jarrett Villarreal, Joshua Weigel, Philip Winkler, Eleanor landon, Parker |
| author_facet | Winklehner, Daniel Engebretson, Samuel Moon, Jarrett Villarreal, Joshua Weigel, Philip Winkler, Eleanor landon, Parker |
| contents | We present two iterations of the Multicusp Ion Source Technology at MIT (MIST) sources, designed to fulfill the requirements of the HCHC-XX cyclotron design. The HCHC-XX is a novel compact cyclotron accelerating H$_2^+$. Beam is injected through a radio-frequency quadrupole buncher-accelerator (embedded in the cyclotron yoke) and utilizes so-called vortex motion during acceleration. If successful, it will deliver 10 mA of protons at 60 MeV in CW mode. This scheme requires a low-emittance, high-current initial beam with high H$_2^+$ purity. We briefly summarize the design and previous results of the MIST-1 ion source and, for the first time, the detailed design of the new and improved MIST-2, including the mechanical, electrical, and control system design. We further show experimental results of using the MIST-2 backplate on the MIST-1 body, present a study using different types of permanent magnets for confinement (including no magnets), and finally, we present first results of the MIST-2 in full operation. In this first commissioning run, we were able to increase the total extracted current from the MIST-2 to 7 mA - a factor of 2 over the MIST-1. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_03155 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The MIST-1 and MIST-2 multicusp ion sources for high-current H$_2^+$ beams Winklehner, Daniel Engebretson, Samuel Moon, Jarrett Villarreal, Joshua Weigel, Philip Winkler, Eleanor landon, Parker Accelerator Physics We present two iterations of the Multicusp Ion Source Technology at MIT (MIST) sources, designed to fulfill the requirements of the HCHC-XX cyclotron design. The HCHC-XX is a novel compact cyclotron accelerating H$_2^+$. Beam is injected through a radio-frequency quadrupole buncher-accelerator (embedded in the cyclotron yoke) and utilizes so-called vortex motion during acceleration. If successful, it will deliver 10 mA of protons at 60 MeV in CW mode. This scheme requires a low-emittance, high-current initial beam with high H$_2^+$ purity. We briefly summarize the design and previous results of the MIST-1 ion source and, for the first time, the detailed design of the new and improved MIST-2, including the mechanical, electrical, and control system design. We further show experimental results of using the MIST-2 backplate on the MIST-1 body, present a study using different types of permanent magnets for confinement (including no magnets), and finally, we present first results of the MIST-2 in full operation. In this first commissioning run, we were able to increase the total extracted current from the MIST-2 to 7 mA - a factor of 2 over the MIST-1. |
| title | The MIST-1 and MIST-2 multicusp ion sources for high-current H$_2^+$ beams |
| topic | Accelerator Physics |
| url | https://arxiv.org/abs/2507.03155 |