Speaker
Description
The Super Tau-Charm Facility (STCF), a new-generation electron-positron collider proposed in China, is a major international scientific facility designed to operate in the center-of-mass energy range of 2–7 GeV, with luminosity at 4 GeV beyond 5x1034 cm-2s-1. It adopts third-generation collider design concepts, including ultra-small beam size, a large Piwinski angle, and the crab waist scheme. However, these features introduce challenges such as a limited dynamic aperture and a short beam lifetime, which significantly complicate beam injection. Two injection schemes are currently under investigation. The first is off-axis injection, which is technologically mature but requires a large horizontal dynamic aperture and is characterized by low injection efficiency and considerable beam loss. The second is swap-out injection, with stored bunches replaced by injected ones using ultra-fast kickers, improving injection efficiency and easing aperture constraints, but imposing stringent technical requirements and high costs on the injector system. To address these challenges, we propose an injection design compatible with both schemes, reserving upgrade potential from off-axis injection in Phase I to swap-out injection in Phase II.
| Paper status | Proceeding files received |
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