Paper | Title | Page |
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WEA3I1 | Synchronous Phases and Transit Time Factor | 241 |
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Synchronous phases (¿s) and transit time factors (T) are THE key parameters for linac designs and operations. While the couple (¿s, T) is still our way of thinking the longitudinal beam dynamics, it is important to have in mind that the original ¿Panofsky¿ definition of these parameters is no longer valid in the case of high accelerating gradients leading to high particle velocity changes and in the case of multi-gap cavities. In this case, a new (¿s, T) definition allowing to keep both acceleration and longitudinal focusing properties is proposed. Examples are given in the SPIRAL2 linac case. | ||
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Slides WEA3I1 [2.369 MB] | |
DOI • | reference for this paper ※ doi:10.18429/JACoW-HB2023-WEA3I1 | |
About • | Received ※ 27 September 2023 — Revised ※ 12 October 2023 — Accepted ※ 13 October 2023 — Issued ※ 17 October 2023 | |
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WEA3I2 |
Particle Resonances’ Domination Over Parametric Instabilities and Their Mitigation | |
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Studies have clarified the differences between the particle resonances and the parametric resonances (instabilities). Particle resonances dominate over parametric instabilities in resonance stopbands for non-KV beams, and higher order parametric instabilities are not manifested for Gaussian beams. Also mitigation of the 4th order particle resonance is studied using beam spinning by introducing angular momentum. | ||
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Slides WEA3I2 [2.857 MB] | |
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