Abstract SPIRAL 2 is a high intensity heavy ions beams accelerator project that has been going on for more than 10 years now. Countless efforts in different disciplines made it what it is today. One of the most important steps after the set up of the different equipments has been the very first full cool down of the superconducting cavities in an accelerator operation type configuration. While this has been a major achievement for the SPIRAL 2 teams, it also hi-lighted new challenges and constraints that would have to be addressed in order to have a high availability rate of the beam from the cryogenics side. This paper retraces this particular episode.

中文翻译：

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SPIRAL 2 超导 LINAC 首次完全冷却

摘要 SPIRAL 2 是一个高强度重离子束加速器项目，至今已持续 10 多年。不同学科的无数努力使它成为今天的样子。设置不同设备后最重要的步骤之一是在加速器操作型配置中对超导腔进行第一次完全冷却。虽然这对 SPIRAL 2 团队来说是一项重大成就，但它也强调了必须解决的新挑战和限制，以便从低温方面获得高的光束可用性。本文回顾了这一特定事件。