Tuning methods for multigap drift tube linacs
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866916693598535680 |
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| author | Shelbaya, Olivier Baartman, Rick Braun, Peter Jung, Paul Matthew Kester, Oliver Planche, Thomas Podlech, Holger Radel, Stephanie Diana |
| author_facet | Shelbaya, Olivier Baartman, Rick Braun, Peter Jung, Paul Matthew Kester, Oliver Planche, Thomas Podlech, Holger Radel, Stephanie Diana |
| contents | Multigap cavities are used extensively in linear accelerators to achieve velocities up to a few percent of the speed of light, driving nuclear physics research around the world. Unlike for single-gap structures, there is no closed-form expression to calculate the output beam parameters from the cavity voltage and phase. To overcome this, we propose to use a method based on the integration of the first and second moments of the beam distribution through the axially symmetric time-dependent fields of the cavity. A beam-based calibration between the model's electric field scaling and the machine's rf amplitudes is presented, yielding a fast online energy change method, returning cavity amplitude and phase necessary for a desired output beam energy and energy spread. The method is validated with 23Na6+ beam energy measurements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_12502 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Tuning methods for multigap drift tube linacs Shelbaya, Olivier Baartman, Rick Braun, Peter Jung, Paul Matthew Kester, Oliver Planche, Thomas Podlech, Holger Radel, Stephanie Diana Accelerator Physics Applied Physics Computational Physics Multigap cavities are used extensively in linear accelerators to achieve velocities up to a few percent of the speed of light, driving nuclear physics research around the world. Unlike for single-gap structures, there is no closed-form expression to calculate the output beam parameters from the cavity voltage and phase. To overcome this, we propose to use a method based on the integration of the first and second moments of the beam distribution through the axially symmetric time-dependent fields of the cavity. A beam-based calibration between the model's electric field scaling and the machine's rf amplitudes is presented, yielding a fast online energy change method, returning cavity amplitude and phase necessary for a desired output beam energy and energy spread. The method is validated with 23Na6+ beam energy measurements. |
| title | Tuning methods for multigap drift tube linacs |
| topic | Accelerator Physics Applied Physics Computational Physics |
| url | https://arxiv.org/abs/2504.12502 |