Coherent synchrotron radiation instability in low-emittance electron storage rings
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866911891977142272 |
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| author | Dastan, Sara Zhou, Demin Ishibashi, Takuya Karantzoulis, Emanuel Di Mitri, Simone Lindberg, Ryan |
| author_facet | Dastan, Sara Zhou, Demin Ishibashi, Takuya Karantzoulis, Emanuel Di Mitri, Simone Lindberg, Ryan |
| contents | Longitudinal impedances at high frequencies, which extend far beyond the width of the beam spectrum, can pose a threat to the performance of modern low-emittance electron storage rings, as they can establish a relatively low threshold for microwave instability. In such rings, coherent synchrotron radiation (CSR) emerges as a prominent contributor to these high-frequency impedances. This paper undertakes a systematic investigation into the effects of CSR on electron rings, utilizing Elettra 2.0, a ring of fourth-generation light sources, and the SuperKEKB low-energy ring, a ring of $e^+e^-$ circular colliders, as illustrative examples. Our work revisits theories of microwave instability driven by CSR impedance, extending the analysis to encompass other high-frequency impedances such as resistive wall and coherent wiggler radiation. Through instability analysis and numerical simulations conducted on the two aforementioned rings, the study explored the impact of high-frequency impedances and their interactions with broadband impedances from discontinuities in vacuum chambers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_18738 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Coherent synchrotron radiation instability in low-emittance electron storage rings Dastan, Sara Zhou, Demin Ishibashi, Takuya Karantzoulis, Emanuel Di Mitri, Simone Lindberg, Ryan Accelerator Physics Longitudinal impedances at high frequencies, which extend far beyond the width of the beam spectrum, can pose a threat to the performance of modern low-emittance electron storage rings, as they can establish a relatively low threshold for microwave instability. In such rings, coherent synchrotron radiation (CSR) emerges as a prominent contributor to these high-frequency impedances. This paper undertakes a systematic investigation into the effects of CSR on electron rings, utilizing Elettra 2.0, a ring of fourth-generation light sources, and the SuperKEKB low-energy ring, a ring of $e^+e^-$ circular colliders, as illustrative examples. Our work revisits theories of microwave instability driven by CSR impedance, extending the analysis to encompass other high-frequency impedances such as resistive wall and coherent wiggler radiation. Through instability analysis and numerical simulations conducted on the two aforementioned rings, the study explored the impact of high-frequency impedances and their interactions with broadband impedances from discontinuities in vacuum chambers. |
| title | Coherent synchrotron radiation instability in low-emittance electron storage rings |
| topic | Accelerator Physics |
| url | https://arxiv.org/abs/2405.18738 |