SRF2025 - 22nd International Conference on RF Superconductivity

Research and development of Nb3Sn SRF cavity at IHEP

TUP32

23 Sept 2025, 14:30

3h

Ito International Research Center

Board: TUP32

Poster Presentation MC3: Cavities Tuesday Poster Session

Speaker

Peng Sha (Institute of High Energy Physics)

Description

Research of Nb3Sn superconducting radio-frequency (SRF) cavities was conducted at the Institute of High Energy Physics Chinese Academy of Sciences (IHEP), in order to improve the intrinsic quality factor (Q0) and accelerating gradient (Eacc). Various recipes of coating were attempted at SRF cavities and samples made of Nb, which resulted in different Sn content. It was found that the Sn content, namely the ratio of Nb/Sn, had great influences on the performance of Nb3Sn SRF cavities. When the ratio of Nb/Sn was slightly higher than 3, the Nb3Sn SRF cavities showed the best performance during the vertical test. Q0 of 1.3 GHz 1-cell Nb3Sn SRF cavity (the ratio of Nb/Sn ≈ 3.16) reached 3.0 × 1010 (@ 4.2 K) and 1.0 × 1011 (@ 2.0 K) at low RF field. Besides, conduction cooling of Nb3Sn SRF cavity has also been carried out at IHEP.