Stable beam operation of approximately 1 mA beam under highly efficient energy recovery conditions at compact energy-recovery linac

arXiv - PHYS - Accelerator Physics Pub Date : 2024-08-24 DOI:arxiv-2408.13478

Hiroshi SakaiHigh Energy Accelerator Research Organization, Dai ArakawaHigh Energy Accelerator Research Organization, Takaaki FuruyaHigh Energy Accelerator Research Organization, Kaiichi HagaHigh Energy Accelerator Research Organization, Masayuki HagiwaraHigh Energy Accelerator Research Organization, Kentaro HaradaHigh Energy Accelerator Research Organization, Yosuke HondaHigh Energy Accelerator Research Organization, Teruya HonmaHigh Energy Accelerator Research Organization, Eiji KakoHigh Energy Accelerator Research Organization, Ryukou KatoHigh Energy Accelerator Research Organization, Yuuji KojimaHigh Energy Accelerator Research Organization, Taro KonomiHigh Energy Accelerator Research Organization, Hiroshi MatsumuraHigh Energy Accelerator Research Organization, Taichi MiuraHigh Energy Accelerator Research Organization, Takako MiuraHigh Energy Accelerator Research Organization, Shinya NagahashiHigh Energy Accelerator Research Organization, Hirotaka NakaiHigh Energy Accelerator Research Organization, Norio NakamuraHigh Energy Accelerator Research Organization, Kota NakanishiHigh Energy Accelerator Research Organization, Kazuyuki NigorikawaHigh Energy Accelerator Research Organization, Takashi NogamiHigh Energy Accelerator Research Organization, Takashi ObinaHigh Energy Accelerator Research Organization, Feng QiuHigh Energy Accelerator Research Organization, Hidenori SagehashiHigh Energy Accelerator Research Organization, Shogo SakanakaHigh Energy Accelerator Research Organization, Miho ShimadaHigh Energy Accelerator Research Organization, Mikito TadanoHigh Energy Accelerator Research Organization, Takeshi TakahashiHigh Energy Accelerator Research Organization, Ryota TakaiHigh Energy Accelerator Research Organization, Olga TanakaHigh Energy Accelerator Research Organization, Yasunori TanimotoHigh Energy Accelerator Research Organization, Akihiro ToyodaHigh Energy Accelerator Research Organization, Takashi UchiyamaHigh Energy Accelerator Research Organization, Kensei UmemoriHigh Energy Accelerator Research Organization, Masahiro YamamotoHigh Energy Accelerator Research Organization, Go YoshidaHigh Energy Accelerator Research Organization, Nobuyuki NishimoriNational Institutes for Quantum and Radiological Science and Technology, Ryoichi HajimaNational Institutes for Quantum and Radiological Science and Technology, Ryoji NagaiNational Institutes for Quantum and Radiological Science and Technology, Masaru SawamuraNational Institutes for Quantum and Radiological Science and Technology

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Abstract

A compact energy-recovery linac (cERL) has been un-der construction at KEK since 2009 to develop key technologies for the energy-recovery linac. The cERL began operating in 2013 to create a high-current beam with a low-emittance beam with stable continuous wave (CW) superconducting cavities. Owing to the development of critical components, such as the DC gun, superconducting cavities, and the design of ideal beam transport optics, we have successfully established approximately 1 mA stable CW operation with a small beam emittance and extremely small beam loss. This study presents the details of our key technologies and experimental results for achieving 100% energy recovery operation with extremely small beam loss during a stable, approximately 1 mA CW beam operation.

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紧凑型能量回收直列加速器在高效能量回收条件下稳定运行约 1 mA 光束

自2009年以来，韩国科学技术院一直在建造紧凑型能量回收直列加速器（cERL），以开发能量回收直列加速器的关键技术。cERL 于 2013 年开始运行，利用稳定的连续波（CW）超导空腔产生大电流低幅射束。由于直流枪、超导空腔等关键部件的开发，以及理想的光束传输光学器件的设计，我们成功建立了约1毫安的稳定连续波运行，光束发射率小，光束损耗极小。本研究详细介绍了我们在稳定的约 1 毫安连续波操作过程中以极小的光束损耗实现 100% 能量回收操作的关键技术和实验结果。

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