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1. Error analysis of vertical test for CEPC 650 MHz superconducting radio-frequency cavity

Author

Ye, Lingxi, Sha, Peng, Mi, Zhenghui, He, Feisi, and Zhai, Jiyuan

Subjects
Physics - Accelerator Physics, High Energy Physics - Experiment
Abstract

Hundreds of 650 MHz superconducting radio-frequency (SRF) cavities with high intrinsic quality factor (Q0) and accelerating gradient (Eacc) will be adopted for Circular Electron Positron Collider (CEPC). The values of Q0 and Eacc are obtained during vertical test at 2.0 K. Hence, high accuracy of vertical test is essential for evaluating the performance of SRF cavity. The 650 MHz SRF cavities achieved very high Q0 (6E10) and Eacc (40 MV/m) during the vertical test. In our study, the error analysis of vertical test was conducted in the scalar case, in order to achieve high accuracy. The uncertainties of vertical test were obtained through calculation, which was approximately 3% for Eacc and less than 5% for Q0. This result was reasonable and acceptable.

Published
2024

2. Correction: CEPC Technical Design Report: Accelerator

Author

Abdallah, Waleed, de Freitas, Tiago CarlosAdorno, Afanaciev, Konstantin, Ahmad, Shakeel, Ahmed, Ijaz, Ai, Xiaocong, Aleem, Abid, Altmannshofer, Wolfgang, Alves, Fabio, An, Weiming, An, Rui, Anderle, Daniele Paolo, Antusch, Stefan, Arai, Yasuo, Arbuzov, Andrej, Arhrib, Abdesslam, Ashry, Mustafa, Bai, Sha, Bai, Yu, Bai, Yang, Bairathi, Vipul, Balazs, Csaba, Bambade, Philip, Ban, Yong, Bandyopadhyay, Triparno, Bao, Shou-Shan, Barber, Desmond P., Bat, Ays¸e, Batozskaya, Varvara, Behera, Subash Chandra, Belyaev, Alexander, Bertucci, Michele, Bi, Xiao-Jun, Bi, Yuanjie, Bian, Tianjian, Bianchi, Fabrizio, Bieko¨tter, Thomas, Biglietti, Michela, Bilanishvili, Shalva, Binglin, Deng, Bodrov, Denis, Bogomyagkov, Anton, Bondarenko, Serge, Boogert, Stewart, Boonekamp, Maarten, Borri, Marcello, Bosotti, Angelo, Boudry, Vincent, Boukidi, Mohammed, Boyko, Igor, Bozovic, Ivanka, Bozzi, Giuseppe, Brient, Jean-Claude, Budzinskaya, Anastasiia, Bukhari, Masroor, Bytev, Vladimir, Cacciapaglia, Giacomo, Cai, Hua, Cai, Wenyong, Cai, Wujun, Cai, Yijian, Cai, Yizhou, Cai, Yuchen, Cai, Haiying, Cai, Huacheng, Calibbi, Lorenzo, Cang, Junsong, Cao, Guofu, Cao, Jianshe, Chance, Antoine, Chang, Xuejun, Chang, Yue, Chang, Zhe, Chang, Xinyuan, Chao, Wei, Chatrabhuti, Auttakit, Che, Yimin, Che, Yuzhi, Chen, Bin, Chen, Danping, Chen, Fuqing, Chen, Fusan, Chen, Gang, Chen, Guoming, Chen, Hua-Xing, Chen, Huirun, Chen, Jinhui, Chen, Ji-Yuan, Chen, Kai, Chen, Mali, Chen, Mingjun, Chen, Mingshui, Chen, Ning, Chen, Shanhong, Chen, Shanzhen, Chen, Shao-Long, Chen, Shaomin, Chen, Shiqiang, Chen, Tianlu, Chen, Wei, Chen, Xiang, Chen, Xiaoyu, Chen, Xin, Chen, Xun, Chen, Xurong, Chen, Ye, Chen, Ying, Chen, Yukai, Chen, Zelin, Chen, Zilin, Chen, Gang, Chen, Boping, Chen, Chunhui, Cheng, Hok Chuen, Cheng, Huajie, Cheng, Shan, Cheng, Tongguang, Chi, Yunlong, Chimenti, Pietro, Chiu, Wen Han, Cho, Guk, Chu, Ming-Chung, Chu, Xiaotong, Chu, Ziliang, Coloretti, Guglielmo, Crivellin, Andreas, Cui, Hanhua, Cui, Xiaohao, Cui, Zhaoyuan, D’Anzi, Brunella, Dai, Ling-Yun, Dai, Xinchen, Dai, Xuwen, De Maria, Antonio, De Filippis, Nicola, De La Taille, Christophe, De Mori, Francesca, De Sio, Chiara, Del Core, Elisa, Deng, Shuangxue, Deng, Wei-Tian, Deng, Zhi, Deng, Ziyan, Dev, Bhupal, Dewen, Tang, Di Micco, Biagio, Ding, Ran, Ding, Siqin, Ding, Yadong, Dong, Haiyi, Dong, Jianing, Dong, Jing, Dong, Lan, Dong, Mingyi, Dong, Xu, Dong, Yipei, Dong, Yubing, Dordevic, Milos, Drewes, Marco, Du, Mingxuan, Du, Mingxuan, Du, Qianqian, Du, Xiaokang, Du, Yanyan, Du, Yong, Du, Yunfei, Duan, Chun-Gui, Duan, Zhe, Dydyshka, Yahor, Egede, Ulrik, Elmetenawee, Walaa, Eo, Yun, Fan, Ka Yan, Fan, Kuanjun, Fan, Yunyun, Fang, Bo, Fang, Shuangshi, Fang, Yuquan, Farilla, Ada, Farinelli, Riccardo, Farooq, Muhammad, Golfe, Angeles Faus, Fazliakhmetov, Almaz, Fei, Rujun, Feng, Bo, Feng, Chong, Feng, Junhua, Feng, Xu, Feng, Zhuoran, ZhuoranFeng, Castillo, Luis Roberto Flores, Forest, Etienne, Fowlie, Andrew, Fox, Harald, Fu, Hai-Bing, Fu, Jinyu, Fuks, Benjamin, Funakoshi, Yoshihiro, Gabrielli, Emidio, Gan, Nan, Gang, Li, Gao, Jie, Gao, Meisen, Gao, Wenbin, Gao, Wenchun, Gao, Yu, Gao, Yuanning, Gao, Zhanxiang, Gao, Yanyan, Ge, Kun, Ge, Shao-Feng, Ge, Zhenwu, Geng, Li-Sheng, Geng, Qinglin, Geng, Chao-Qiang, Ghosh, Swagata, Gioiosa, Antonio, Gladilin, Leonid, Gong, Ti, Gori, Stefania, Gou, Quanbu, Grinstein, Sebastian, Gu, Chenxi, Guillermo, Gerardo, da Costa, Joao Guimaraes, Guo, Dizhou, Guo, Fangyi, Guo, Jiacheng, Guo, Jun, Guo, Lei, Guo, Lei, Guo, Xia, Guo, Xin-Heng, Guo, Xinyang, Guo, Yun, Guo, Yunqiang, Guo, Yuping, Guo, Zhi-Hui, Gutie´rrez-Rodríguez, Alejandro, Ha, Seungkyu, Habib, Noman, Hajer, Jan, Hammer, Francois, Han, Chengcheng, Han, Huayong, Han, Jifeng, Han, Liang, Han, Liangliang, Han, Ruixiong, Han, Yang, Han, Yezi, Han, Yuanying, Han, Tao, Hao, Jiankui, Hao, Xiqing, XiqingHao, He, Chuanqi, He, Dayong, He, Dongbing, He, Guangyuan, He, Hong-Jian, He, Jibo, He, Jun, He, Longyan, He, Xiang, He, Xiao-Gang, He, Zhenqiang, Heinemann, Klaus, Heinemeyer, Sven, Heng, Yuekun, Herna´ndez-Ruíz, María A., Hong, Jiamin, Hor, Yuenkeung, Hou, George W. S., Hou, Xiantao, Hou, Xiaonan, Hou, Zhilong, Hou, Suen, Hu, Caishi, Hu, Chen, Hu, Dake, Hu, Haiming, Hu, Jiagen, Hu, Jun, Hu, Kun, Hu, Shouyang, Hu, Yongcai, Hu, Yu, Hu, Zhen, Hua, Zhehao, Hua, Jianfei, Huang, Chao-Shang, Huang, Fa Peng, Huang, Guangshun, Huang, Jinshu, Huang, Ke, Huang, Liangsheng, Huang, Shuhui, Huang, Xingtao, Huang, Xu-Guang, Huang, Yanping, Huang, Yonggang, Huang, Yongsheng, Huang, Zimiao, Huanyuan, Chen, Huh, Changgi, Hui, Jiaqi, Huo, Lihua, Hussain, Talab, Hwang, Kyuyeong, Ioannisian, Ara, Iqbal, Munawar, Jackson, Paul, Jafarzade, Shahriyar, Jang, Haeun, Jang, Seoyun, Ji, Daheng, Ji, Qingping, Ji, Quan, Ji, Xiaolu, Jia, Jingguang, Jia, Jinsheng, Jia, Xuewei, Jia, Zihang, Jiang, Cailian, Jiang, Han Ren, Jiang, Houbing, Jiang, Jun, Jiang, Xiaowei, Jiang, Xin, Jiang, Xuhui, Jiang, Yongcheng, Jiang, Zhongjian, Jiang, Cheng, Jiao, Ruiqi, Jin, Dapeng, Jin, Shan, Jin, Song, Jin, Yi, Jis, Junji, Jung, Sunghoon, Kacarevic, Goran, Kajfasz, Eric, Kalinovskaya, Lidia, 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Liu, Tao, Liu, Tong, Liu, Wei, Liu, Xiang, Liu, Xiao-Hai, Liu, Xiaohui, Liu, Xiaoyu, Liu, Xin, Liu, Xinglin, Liu, Xingquan, Liu, Yang, Liu, Yanlin, Liu, Yao-Bei, Liu, Yi, Liu, Yiming, Liu, Yong, Liu, Yonglu, Liu, Yu, Liu, Yubin, Liu, Yudong, Liu, Yulong, Liu, Zhaofeng, Liu, Zhen, Liu, Zhenchao, Liu, Zhi, Liu, Zhi-Feng, Liu, Zhiqing, Liu, Zhongfu, Liu, Zuowei, Liu, Mia, Liu, Zhen, Liu, Xiaoyang, Lou, Xinchou, Lu, Cai-Dian, Lu, Jun-Xu, Lu, Qiu Zhen, Lu, Shang, Lu, Shang, Lu, Wenxi, Lu, Xiaohan, Lu, Yunpeng, Lu, Zhiyong, Lu, Xianguo, Lu, Wei, Lubsandorzhiev, Bayarto, Lubsandorzhiev, Sultim, Lukanov, Arslan, Luo, Jinliang, Luo, Tao, Luo, xiaoan, Luo, Xiaofeng, Luo, Xiaolan, Lv, Jindong, Lyu, Feng, Lyu, Xiao-Rui, Lyu, Kun-Feng, Ma, Ande, Ma, Hong-Hao, Ma, Jun-Li, Ma, Kai, Ma, Lishuang, Ma, Na, Ma, Renjie, Ma, Weihu, Ma, Xinpeng, Ma, Yanling, Ma, Yan-Qing, Ma, Yongsheng, Ma, Zhonghui, Ma, Zhongjian, Ma, Yang, Maity, Mousam, Mao, Lining, Mao, Yanmin, Mao, Yaxian, Martens, Aure´lien, Maria, Caccia Massimo Luigi, Matsumoto, Shigeki, Mellado, Bruce, Meloni, Davide, Men, Lingling, Meng, Cai, Meng, Lingxin, Mi, Zhenghui, Miao, Yuhui, Migliorati, Mauro, Ming, Lei, Mitsou, Vasiliki A., Monaco, Laura, Moraes, Arthur, Mosala, Karabo, Moursy, Ahmad, Mu, Lichao, Mu, Zhihui, Muchnoi, Nickolai, Muenstermann, Daniel, Muenstermann, Daniel, Munbodh, Pankaj, Murray, William John, Nanni, Jérôme, Nanzanov, Dmitry, Nie, Changshan, Nikitin, Sergei, Ning, Feipeng, Ning, Guozhu, Niu, Jia-Shu, Niu, Juan-Juan, Niu, Yan, Nkadimeng, Edward Khomotso, Ohmi, Kazuhito, Oide, Katsunobu, Okawa, Hideki, Ouchemhou, Mohamed, Ouyang, Qun, Paesani, Daniele, Pagani, Carlo, Paganis, Stathes, Pakuza, Collette, Pan, Jiangyang, Pan, Juntong, Pan, Tong, Pan, Xiang, Panda, Papia, Pandey, Saraswati, Pandurovic, Mila, Paparella, Rocco, Pasechnik, Roman, Passemar, Emilie, Pei, Hua, Peng, Xiaohua, Peng, Xinye, Peng, Yuemei, Ping, Jialun, Ping, Ronggang, Adhya, Souvik Priyam, Qi, Baohua, Qi, Hang, Qi, Huirong, Qi, Ming, Qian, Sen, Qian, Zhuoni, Qiao, Congfeng, Qin, Guangyou, Qin, Jiajia, Qin, Laishun, Qin, Liqing, Qin, Qin, Qin, Xiaoshuai, Qin, Zhonghua, Qu, Guofeng, Racioppi, Antonio, Ramsey-Musolf, Michael, Raza, Shabbar, Rekovic, Vladimir, Ren, Jing, Reuter, Ju¨rgen, Robens, Tania, Rossi, Giancarlo, Ruan, Manqi, Ruan, Manqi, Rumyantsev, Leonid, Ryu, Min Sang, Sadykov, Renat, Sang, Minjing, Sanz-Cillero, Juan Jose´, Saur, Miroslav, Savla, Nishil, Schmidt, Michael A., Sertore, Daniele, Settles, Ron, Sha, Peng, Shao, Ding-Yu, Shao, Ligang, Shao, Hua-Sheng, She, Xin, Shen, Chuang, Shen, Hong-Fei, Shen, Jian-Ming, Shen, Peixun, Shen, Qiuping, Shen, Zhongtao, Sheng, Shuqi, Shi, Haoyu, Shi, Hua, Shi, Qi, Shi, Shusu, Shi, Xiaolei, Shi, Xin, Shi, Yukun, Shi, Zhan, Shipsey, Ian, Shiu, Gary, Shu, Chang, Si, Zong-Guo, Sidorenkov, Andrei, Smiljanić, Ivan, Song, Aodong, Song, Huayang, Song, Jiaojiao, Song, Jinxing, Song, Siyuan, Song, Weimin, Song, Weizheng, Song, Zhi, Sourav, Shashwat, Spruzzola, Paolo, Su, Feng, Su, Shengsen, Su, Wei, Su, Shufang, Sui, Yanfeng, Sui, Zexuan, Sullivan, Michael, Sun, Baiyang, Sun, Guoqiang, Sun, Hao, Sun, Hao-Kai, Sun, Junfeng, Sun, Liang, Sun, Mengcheng, Sun, Pengfei, Sun, Sichun, Sun, Xianjing, Sun, Xiaohu, Sun, Xilei, Sun, Xingyang, Sun, Xin-Yuan, Sun, Yanjun, Sun, Yongzhao, Sun, Yue, Sun, Zheng, Sun, Zheng, Suwonjandee, Narumon, Eldin, Elsayed Tag, Tan, Biao, Tang, Bo, Tang, Chuanxiang, Tang, Gao, Tang, Guangyi, Tang, Jian, Tang, Jingyu, Tang, Liang, Tang, Ying’Ao, Tao, Junquan, Tawfik, Abdel Nasser, Taylor, Geoffrey, Telnov, Valery, Tian, Saike, Torre, Riccardo, Trzaska, Wladyslaw Henryk, Tsybychev, Dmitri, Tu, Yanjun, Tuo, Shengquan, Tytgat, Michael, Islam, Ghalib Ul, Ushakov, Nikita, Valencia, German, Velthuis, Jaap, Vicini, Alessandro, Vickey, Trevor, Vidakovic, Ivana, Videau, Henri, Volkas, Raymond, Voronin, Dmitry, Vukasinovic, Natasa, Wan, Xia, Wan, Xuying, Wang, Xiao, Wang, Anqing, Wang, Bin, Wang, Chengtao, Wang, Chuanye, Wang, Ci, Wang, Dayong, Wang, Dou, Wang, En, Wang, Fei, Wang, Fei, Wang, Guanwen, Wang, Guo-Li, Wang, Haijing, Wang, Haolin, Wang, Jia, Wang, Jian, Wang, Jianchun, Wang, Jianli, Wang, Jiawei, Wang, Jin, Wang, Jin-Wei, Wang, Joseph, Wang, Kechen, Wang, Lechun, Wang, Lei, Wang, Liguo, Wang, Lijiao, Wang, Lu, Wang, Meng, Wang, Na, Wang, Pengcheng, Wang, Qian, Wang, Qun, Wang, Shu Lin, Wang, Shudong, Wang, Taofeng, Wang, Tianhong, Wang, Tianyang, Wang, Tong, Wang, Wei, Wang, Wei, Wang, Xiaolong, Wang, Xiaolong, Wang, Xiaoning, Wang, Xiao-Ping, Wang, Xiongfei, Wang, Xujian, Wang, Yaping, Wang, Yaqian, Wang, Yi, Wang, Yiao, Wang, Yifang, Wang, Yilun, Wang, Yiwei, Wang, You-Kai, Wang, Yuanping, Wang, Yuexin, Wang, Yuhao, Wang, Yu-Ming, Wang, Yuting, Wang, Zhen, Wang, Zhigang, Wang, Weiping, Wang, Zeren Simon, Wang, Biao, Wang, Hui, Wang, Lian-Tao, Wang, Zihui, Wang, Zirui, Wang, Jia, Wang, Tong, Wei, Daihui, Wei, Shujun, Wei, Wei, Wei, Xiaomin, Wei, Yuanyuan, Wei, Yingjie, Wen, Liangjian, Wen, Xuejun, Wen, Yufeng, White, Martin, Williams, Peter, Wolffs, Zef, Womersley, William John, Wu, Baona, Wu, Bobing, Wu, Guanjian, Wu, Jinfei, Wu, Lei, Wu, Lina, Wu, Linghui, Wu, Minlin, Wu, Peiwen, Wu, Qi, Wu, Qun, Wu, Tianya, Wu, Xiang, Wu, Xiaohong, Wu, Xing-Gang, Wu, Xuehui, Wu, Yaru, Wu, Yongcheng, Wu, Yuwen, Wu, Zhi, Wu, Xin, Xia, Lei, Xia, Ligang, Xia, Shang, Xiang, Benhou, Xiang, Dao, Xiang, Zhiyu, Xiao, Bo-Wen, Xiao, Chu-Wen, Xiao, Dong, Xiao, Guangyan, Xiao, Han, Xiao, Meng, Xiao, Ouzheng, Xiao, Rui-Qing, Xiao, Xiang, Xiao, Yichen, Xiao, Ying, Xiao, Yu, Xiao, Yunlong, Xiao, Zhenjun, Xiao, Hengyuan, Xie, Nian, Xie, Yuehong, Xin, Tianmu, Xing, Ye, Xing, Zhizhong, Xu, Da, Xu, Fang, Xu, Fanrong, Xu, Haisheng, Xu, Haocheng, Xu, Ji, Xu, Miaofu, Xu, Qingjin, Xu, Qingnian, Xu, Wei, Xu, Wei, Xu, Weixi, Xu, Xinping, Xu, Zhen, Xu, Zijun, Xu, Zehua, Xu, Yaoyuan, Xue, Feifei, Yan, Baojun, Yan, Bin, Yan, Fen, Yan, Fucheng, Yan, Jiaming, Yan, Liang, Yan, Luping, Yan, Qi-Shu, Yan, Wenbiao, Yan, Yupeng, Yan, Luping, Yan, Haoyue, Yang, Dong, Yang, Fengying, Yang, Guicheng, Yang, Haijun, Yang, Jin Min, Yang, Jing, Yang, Lan, Yang, Li, Yang, Li Lin, Yang, Lili, Yang, Litao, Yang, Mei, Yang, Qiaoli, Yang, Tiansen, Yang, Xiaochen, Yang, Yingjun, Yang, Yueling, Yang, Zhengyong, Yang, Zhenwei, Yang, Youhua, Yang, Xiancong, Yao, De-Liang, Yao, Shi, Ye, Lei, Ye, Lingxi, Ye, Mei, Ye, Rui, Ye, Rui, Ye, Yecheng, Yermolchyk, Vitaly, Yi, Kai, Yi, Li, Yi, Yang, Yin, Di, Yin, Peng-Fei, Yin, Shenghua, Yin, Ze, Yin, Zhongbao, Yinhong, Zhang, Yoo, Hwi Dong, You, Zhengyun, Young, Charles, Yu, Boxiang, Yu, Chenghui, Yu, Fusheng, Yu, Jie-Sheng, Yu, Jinqing, Yu, Lingda, Yu, Zhao-Huan, Yu, Felix, Yu, Bingrong, Yuan, Changzheng, Yuan, Li, Yuan, Xing-Bo, Yuan, Youjin, Yue, Junhui, Yue, Qian, Yue, Baobiao, Zaib, Un Nisa, Zanzottera, Riccardo, Zeng, Hao, Zeng, Ming, Zhai, Jian, Zhai, Jiyuan, Zhai, Xin Zhe, Zhan, Xi-Jie, Zhang, Ben-Wei, Zhang, Bolun, Zhang, Di, Zhang, Guangyi, Zhang, Hao, Zhang, Hong-Hao, Zhang, Huaqiao, Zhang, Hui, Zhang, Jialiang, Zhang, Jianyu, Zhang, Jianzhong, Zhang, Jiehao, Zhang, Jielei, Zhang, Jingru, Zhang, Jinxian, Zhang, Junsong, Zhang, Junxing, Zhang, Lei, Zhang, Lei, Zhang, Liang, Zhang, Licheng, Zhang, Liming, Zhang, Linhao, Zhang, Luyan, Zhang, Mengchao, Zhang, Rao, Zhang, Shulei, Zhang, Wan, Zhang, Wenchao, Zhang, Xiangzhen, Zhang, Xiaomei, Zhang, Xiaoming, Zhang, Xiaoxu, Zhang, Xiaoyu, Zhang, Xuantong, Zhang, Xueyao, Zhang, Yang, Zhang, Yang, Zhang, Yanxi, Zhang, Yao, Zhang, Ying, Zhang, Yixiang, Zhang, Yizhou, Zhang, Yongchao, Zhang, Yu, Zhang, Yuan, Zhang, Yujie, Zhang, Yulei, Zhang, Yumei, Zhang, Yunlong, Zhang, Zhandong, Zhang, Zhaoru, Zhang, Zhen-Hua, Zhang, Zhenyu, Zhang, Zhichao, Zhang, Zhi-Qing, Zhang, Zhuo, Zhang, Zhiqing, Zhang, Cong, Zhang, Tianliang, Zhang, Luyan, Zhao, Guang, Zhao, Hongyun, Zhao, Jie, Zhao, Jingxia, Zhao, Jingyi, Zhao, Ling, Zhao, Luyang, Zhao, Mei, Zhao, Minggang, Zhao, Mingrui, Zhao, Qiang, Zhao, Ruiguang, Zhao, Tongxian, Zhao, Yaliang, Zhao, Ying, Zhao, Yue, Zhao, Zhiyu, Zhao, Zhuo, Zhemchugov, Alexey, Zheng, Hongjuan, Zheng, Jinchao, Zheng, Liang, Zheng, Ran, zheng, shanxi, Zheng, Xu-Chang, Zhile, Wang, Zhong, Weicai, Zhong, Yi-Ming, Zhou, Chen, Zhou, Daicui, Zhou, Jianxin, Zhou, Jing, Zhou, Jing, Zhou, Ning, Zhou, Qi-Dong, Zhou, Shiyu, Zhou, Shun, Zhou, Sihong, Zhou, Xiang, Zhou, Xingyu, Zhou, Yang, Zhou, Yong, Zhou, Yu-Feng, Zhou, Zusheng, Zhou, Demin, Zhu, Dechong, Zhu, Hongbo, Zhu, Huaxing, Zhu, Jingya, Zhu, Kai, Zhu, Pengxuan, Zhu, Ruilin, Zhu, Xianglei, Zhu, Yingshun, Zhu, Yongfeng, Zhuang, Xiao, Zhuang, Xuai, Zobov, Mikhail, Zong, Zhanguo, Zou, Cong, and Zou, Hongying

Published
2024
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4. High Q and high gradient performance of the first medium-temperature baking 1.3 GHz cryomodule

Author

Zhai, Jiyuan, Pan, Weimin, He, Feisi, Ge, Rui, Mi, Zhenghui, Sha, Peng, Jin, Song, Han, Ruixiong, Wang, Qunyao, Lin, Haiying, Wang, Guangwei, Li, Mei, Sang, Minjing, Sun, Liangrui, Ye, Rui, Zhao, Tongxian, Li, Shaopeng, Zhu, Keyu, Liu, Baiqi, Wang, Xiaolong, Yang, Xiangchen, Bian, Xiaojuan, Zhang, Xiangzhen, Ma, Huizhou, Dai, Xuwen, Zhang, Zhanjun, Zhang, Liang, Zhao, Hui, Guo, Runbing, Mu, Zhihui, Yang, Conglai, Zheng, Xiaobing, Dong, Chao, Huang, Tongming, Ma, Qiang, Zheng, Hongjuan, Liu, Ming, Wang, Zihan, and Zhou, Wenzhong

Subjects
Physics - Accelerator Physics
Abstract

World's first 1.3 GHz cryomodule containing eight 9-cell superconducting radio-frequency (RF) cavities treated by medium-temperature furnace baking (mid-T bake) was developed, assembled and tested at IHEP for the Dalian Advanced Light Source (DALS) and CEPC R&D. The 9-cell cavities in the cryomodule achieved an unprecedented highest average Q0 of 3.8E10 at 16 MV/m and 3.6E10 at 21 MV/m in the horizontal test. The cryomodule can operate stably up to a total CW RF voltage greater than 191 MV, with an average cavity CW accelerating gradient of more than 23 MV/m. The results significantly exceed the specifications of CEPC, DALS and the other high repetition rate free electron laser facilities (LCLS-II, LCLS-II-HE, SHINE, S3FEL). There is evidence that the mid-T bake cavity may not require fast cool-down or long processing time in the cryomodule. This paper reviews the cryomodule performance and discusses some important issues in cryomodule assembly and testing., Comment: 5 pages, 6 figures

Published
2023

5. First Scan Search for Dark Photon Dark Matter with a Tunable Superconducting Radio-Frequency Cavity

Author

SHANHE Collaboration, Tang, Zhenxing, Wang, Bo, Chen, Yifan, Zeng, Yanjie, Li, Chunlong, Yang, Yuting, Feng, Liwen, Sha, Peng, Mi, Zhenghui, Pan, Weimin, Zhang, Tianzong, Jin, Yirong, Hao, Jiankui, Lin, Lin, Wang, Fang, Xie, Huamu, Huang, Senlin, and Shu, Jing

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology, Physics - Accelerator Physics
Abstract

Dark photons have emerged as promising candidates for dark matter, and their search is a top priority in particle physics, astrophysics, and cosmology. We report the first use of a tunable niobium superconducting radio-frequency cavity for a scan search of dark photon dark matter with innovative data analysis techniques. We mechanically adjusted the resonant frequency of a cavity submerged in liquid helium at a temperature of $2$ K, and scanned the dark photon mass over a frequency range of $1.37$ MHz centered at $1.3$ GHz. Our study leveraged the superconducting radio-frequency cavity's remarkably high quality factors of approximately $10^{10}$, resulting in the most stringent constraints to date on a substantial portion of the exclusion parameter space on the kinetic mixing coefficient $\epsilon$ between dark photons and electromagnetic photons, yielding a value of $\epsilon < 2.2 \times 10^{-16}$., Comment: 14 pages, 7 figures, accepted for publication in PRL

Published
2023
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9. Design of a HOM-Damped 166.6 MHz Compact Quarter-Wave beta=1 Superconducting Cavity for High Energy Photon Source

Author

Zhang, Xinying, Dai, Jin, Guo, Lin, Huang, Tongming, Li, Zhongquan, Ma, Qiang, Meng, Fanbo, Mi, Zhenghui, Zhang, Pei, and Zheng, Hongjuan

Subjects
Physics - Accelerator Physics
Abstract

Superconducting cavities with low RF frequencies and heavy damping of higher order modes (HOM) are desired for the main accelerator of High Energy Photon Source (HEPS), a 6 GeV synchrotron light source promising ultralow emittance currently under construction in Beijing. A compact 166.6 MHz superconducting cavity was proposed adopting a quarter-wave beta=1 geometry. Based on the successful development of a proof-of-principle cavity, a HOM-damped 166.6 MHz compact superconducting cavity was subsequently designed. A ferrite damper was installed on the beam pipe to reduce HOM impedance below the stringent threshold of coupled-bunch instabilities. Being compact, RF field heating on the cavity vacuum seal was carefully examined against quenching the NbTi flange. The cavity was later dressed with a helium vessel and the tuning mechanism was also realized. Excellent RF and mechanical properties were eventually achieved. Finally, the two-cavity string was designed to ensure smooth transitions among components and proper shielding of synchrotron light. This paper presents a complete design of a fully dressed HOM-damped low-frequency beta=1 superconducting cavity for HEPS., Comment: Presented at the 2021 International Conference on Radio Frequency Superconducting Conference (SRF 2021), Jun 28th - Jul 2nd, 2021

Published
2021

10. Development of the double spoke cavity prototype for CSNS-II

Author

Zhou, Wenzhong, Pan, Weimin, Ge, Rui, He, Feisi, Dai, Jin, Mi, Zhenghui, Zhao, Hui, Huang, Tongming, Ma, Qiang, Jin, Song, Xu, Miaofu, li, Mei, Liu, Ming, Wang, Zihan, Zhang, Xinying, Wang, Xiaolong, Ye, Lingxi, Liu, Baiqi, Liu, Huachang, Xie, Zhexin, Zhang, Cong, Fan, Mengxu, He, Zhenqiang, Peng, Jun, and Wang, Sheng

Published
2024
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11. Parasitic modes suppression in CW cold tests of 1.3 GHz 9-cell high Q cavities at IHEP

Author

Mi, Zhenghui, He, Feisi, Pan, Weimin, Sha, Peng, Zhai, Jiyuan, Dai, Xuwen, Jina, Song, Zhang, Zhanjun, Dong, Chao, Liu, Baiqi, Zhao, Hui, Gea, Rui, Zhao, Jianbing, Mu, Zhihui, Du, Lei, Sun, Liangrui, Zhang, Liang, Yang, Conglai, Zheng, Xiaobing, Lin, Haiying, Wang, Guangwei, and He, Xiangcong

Subjects
Physics - Accelerator Physics
Abstract

The CW RF test of 1.3 GHz 9-cell cavity in liquid helium bath at 2 K is a very important key point in the cavity procurement. Some problems can be found through the test, according which to optimized and improve the process of cavity. Recently, Medium temperature (mid-T) furnace bake of 1.3 GHz 9-cell cavities have been carried out at IHEP. Through the proceed of mid-T bake, the quality factor of cavity has been greatly improved. While the excitation of the parasitic modes in the high Q cavities CW cold test has been encountered, which implies an error source for the cavity gradient and quality factor determination. In order to ensure the testing accuracy of superconducting cavity, we have improved the testing system. Finally, the parasitic mode is completely suppressed and the CW RF cold test of high Q cavity is guaranteed.

Published
2021

13. Medium-temperature furnace bake of Superconducting Radio-Frequency cavities at IHEP

Author

He, Feisi, Pan, Weimin, Sha, Peng, Zhai, Jiyuan, Mi, Zhenghui, Dai, Xuwen, Jin, Song, Zhang, Zhanjun, Dong, Chao, Liu, Baiqi, Zhao, Hui, Ge, Rui, Zhao, Jianbing, Mu, Zhihui, Du, Lei, Sun, Liangrui, Zhang, Liang, Yang, Conglai, and Zheng, Xiaobing

Subjects
Physics - Accelerator Physics
Abstract

Recently, heat treatment between 250 C and 500 C has been attempted to improve quality factor of superconducting radio-frequency cavities at FNAL and KEK. Experiments of such medium temperature (mid-T) bake with furnaces have also been carried out at IHEP. Firstly, eleven 1.3 GHz 1-cell cavities were treated with different temperatures at a small furnace. The average quality factor has reached 3.6E10 when the gradient is 16 MV/m. Then, the recipe of mid-T furnace bake at 300 C for 3 hours has been applied to six 1.3 GHz 9-cell cavities at a new big furnace. The average quality factor has reached 3.8E10 when the gradient is 16 MV/m., Comment: 10 pages, 12 figures

Published
2020

15. Thermal performance analysis and cryogenic experiment of the 650 MHz cavity prototype cryomodule for the circular electron-positron collider

Author

Han, Ruixiong, Chang, Zhengze, Ge, Rui, Zhai, Jiyuan, Yang, Xiaocheng, Ma, Qiang, Sun, Liangrui, Zhou, Jianrong, Li, Shaopeng, Li, Mei, Ye, Rui, Zhao, Tongxian, Sang, Minjing, Sha, Peng, Li, Zhongquan, Mi, Zhenghui, Zheng, Hongjuan, Zhang, Jianqin, Zhang, Xiangzhen, Xu, Miaofu, Jiang, Yongcheng, Zhang, Zhuo, Zhang, Jiehao, Ma, Changcheng, Liu, Baiqi, Huang, Tongming, He, Feisi, Zhang, Xinying, and Li, Xiaoping

Published
2023
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17. Commissioning of te China-ADS injector-I testing facility

Author

Yan, Fang, Geng, Huiping, Meng, Cai, Zhao, Yaliang, Ouyang, Huafu, Pei, Shilun, Liu, Rong, He, Feisi, Huang, Tongming, Ge, Rui, Sui, Yanfeng, Ye, Qiang, Jing, Xiaoping, Long, Fengli, Li, Jungang, Peng, Quanling, Guo, Dizhou, Zhou, Zusheng, Lin, Haiyin, Ma, Xinpeng, Wang, Qunyao, Wang, Guangwei, Shi, Hua, Wu, Gang, Wang, Shengchang, Zhou, Ningchuang, Ma, Qiang, Mi, Zhenghui, Sha, Peng, Zhang, Xinying, Du, Yaoyao, He, Jun, Ma, Huizhou, Yu, Lingda, Zhao, Ying, Zhao, Xiaoyan, Liu, Fang, Lu, Yanhua, Bian, Lin, Sun, liangrui, Ye, Rui, Peng, Xiaohua, He, Dayong, Xiao, Ouzheng, Gao, Yao, Hou, Zhenghua, Chen, Yuan, Yang, Xiangchen, Zhu, Hongyan, Li, Bo, Dong, Lan, Li, Heng, Sun, Xitong, Dong, Linglang, Su, Ping, Dai, Jianping, Wang, Jianli, Li, Shaopeng, Cao, Jianshe, Chi, Yunlong, and Pan, Weimin

Subjects
Physics - Accelerator Physics
Abstract

The 10 MeV accelerator-driven subcritical system (ADS) Injector-I test stand at Institute of High Energy Physics (IHEP) is a testing facility dedicated to demonstrate one of the two injector design schemes [Injector Scheme-I, which works at 325 MHz], for the ADS project in China. The Injector adopted a four vane copper structure RFQ with output energy of 3.2 MeV and a superconducting (SC) section accommodating fourteen \b{eta}g=0.12 single spoke cavities, fourteen SC solenoids and fourteen cold BPMs. The ion source was installed since April of 2014, periods of commissioning are regularly scheduled between installation phases of the rest of the injector. Continuous wave (CW) beam was shooting through the injector and 10 MeV CW proton beam with average beam current around 2 mA was obtained recently. This contribution describe the results achieved so far and the difficulties encountered in CW commissioning., Comment: 11 pages,27 figures

Published
2017

23. Design and test of frequency tuner for CAEP high power THz free-electron laser

Author

Mi, Zhenghui, Sun, Yi, Pan, Weimin, Lin, Haiying, Zhao, Danyang, Lu, Xiangyang, Quan, Shengwen, Luo, Xing, Li, Ming, Yang, Xingfan, Wang, Guangwei, Dai, Jianping, Li, Zhongquan, Ma, Qiang, and Sha, Peng

Subjects
Physics - Accelerator Physics
Abstract

Peking University is developing a 1.3 GHz superconducting accelerating section for China Academy of Engineering Physics (CAEP) high power THz free-electron laser. A compact fast/slow tuner has developed by Institute of High Energy Physics (IHEP) for the accelerating section, to control Lorentz detuning, beam loading effect, compensate for microphonics and liquid Helium pressure fluctuations. The tuner design, warm test and cold test of the first prototype are presented., Comment: 7pages

Published
2014
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28. Development of a 166.6 MHz β = 1 higher-order-mode-damped superconducting cavity.

Author

Guo, Lin, Zhang, Pei, Zhang, Xinying, Dai, Jin, Mi, Zhenghui, Ma, Qiang, and Meng, Fanbo

Abstract

The storage ring of the high energy photon source will be driven by five 166.6 MHz β = 1 quarter-wave superconducting cavities operating at 4 K. A higher-order-mode-damped superconducting cavity was designed with excellent rf and mechanical properties based on the successful development of the proof-of-principle cavity. The mechanical design of the dressed cavity was focused on addressing stress safety throughout the processes, tunability, frequency detuning due to pressure fluctuation, and Lorentz force, among other factors. A new liquid helium vessel was designed along with a comprehensive stiffening scheme to mitigate the surging peak stress on the cavity resulting from the significantly unequal beam pipe size. In the first batch, three cavities were manufactured, and surface preparations were carefully conducted to eliminate defects and etching traces while ensuring cleanliness. The cavity's Q0 at the design voltage of 1.5 MV reached 3.8 × 109 at 4 K, comfortably surpassing the design goal. Field emission onset was not observed during the entire test up to a peak electric field of 60 MV/m, thanks to the optimized processing procedures. Subsequently, one cavity was welded with the newly designed helium vessel and vertically tested at 2 K, achieving an rf performance comparable to the bare cavities, demonstrating the success of the jacketed cavity. This paper presents the design, fabrication, surface preparation, and cryogenic tests of the first higher-order-mode-damped 166.6 MHz β = 1 superconducting cavity. [ABSTRACT FROM AUTHOR]

Published
2024
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30. SRF Cavity Searches for Dark Photon Dark Matter: First Scan Results

Author

Tang, Zhenxing, Wang, Bo, Chen, Yifan, Zeng, Yanjie, Li, Chunlong, Yang, Yuting, Feng, Liwen, Sha, Peng, Mi, Zhenghui, Pan, Weimin, Zhang, Tianzong, Jin, Yirong, Hao, Jiankui, Lin, Lin, Wang, Fang, Xie, Huamu, Huang, Senlin, and Shu, Jing

Subjects
Accelerator Physics (physics.acc-ph), High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, Cosmology and Nongalactic Astrophysics (astro-ph.CO), High Energy Physics - Phenomenology (hep-ph), FOS: Physical sciences, Physics - Accelerator Physics, High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present the first use of a tunable superconducting radio frequency cavity to perform a scan search for dark photon dark matter with novel data analysis strategies. We mechanically tuned the resonant frequency of a cavity embedded in the liquid helium with a temperature of $2$ K, scanning the dark photon mass over a frequency range of $1.37$ MHz centered at $1.3$ GHz. By exploiting the superconducting radio frequency cavity's considerably high quality factors of approximately $10^{10}$, our results demonstrate the most stringent constraints to date on a substantial portion of the exclusion parameter space, particularly concerning the kinetic mixing coefficient between dark photons and electromagnetic photons $\epsilon$, yielding a value of $\epsilon < 2.2 \times 10^{-16}$., Comment: 11 pages, 7 figures

Published
2023

31. Radio-frequency system of the high energy photon source

Author

Zhang, Pei, primary, Dai, Jin, additional, Deng, Ziwei, additional, Guo, Lin, additional, Huang, Tongming, additional, Li, Dongbing, additional, Li, Jian, additional, Li, Zhongquan, additional, Lin, Haiying, additional, Luo, Yuanli, additional, Ma, Qiang, additional, Meng, Fanbo, additional, Mi, Zhenghui, additional, Wang, Qunyao, additional, Xu, Haisheng, additional, Zhang, Xinying, additional, Zhao, Facheng, additional, and Zheng, Hongjuan, additional

Published
2022
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32. Medium-temperature baking of 1.3 GHz superconducting radio frequency single-cell cavity

Author

Quan Zhou, Weimin Pan, Baiqi Liu, Mi Zhenghui, Peng Sha, and Feisi He

Subjects
Nuclear and High Energy Physics, Range (particle radiation), Materials science, business.industry, Superconducting radio frequency, Niobium, Nitrogen doping, chemistry.chemical_element, Electropolishing, Nuclear Energy and Engineering, chemistry, Cell cavity, Optoelectronics, Surface oxidation, business
Abstract

A reliable and repeatable post-processing technology of improving the performance of 1.3 GHz superconducting radio frequency (SRF) cavities is one of the critical technologies for the ILC and XFEL and ERL projects. Three 1.3 GHz single-cell cavities were fabricated and received a baking in temperature 330 °C, while the interior of the cavity stayed in ultra-high vacuum (UHV). The cavities were also vertical-tested after electropolishing (EP) with 120 °C 48-h baking and with nitrogen doping separately for a comparison. The Q0 of 1.3 GHz single cavity after medium-temperature baking can be 2–3 × 1010 in the accelerating gradient range of 2–35 MV/m in the 2 K vertical test in IHEP. Meanwhile, the outer surface oxidation of niobium cavity caused by baking will decrease the performance of the SRF cavity. Medium-temperature (250–400 °C) baking on the 1.3 GHz single-cell cavity will improve its Q0 in 2 K vertical test compared with EP followed by 120 °C 48-h baking baseline and reach a similar level of nitrogen doping, and the quench field will lower to a typical range of 20–30 MV/m. Meanwhile, the cavity performance is sensitive to the baking time and temperature, which indicates that a tremendous improvement can be made on the current treatment.

Published
2020
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35. Medium-temperature furnace baking of 1.3 GHz 9-cell superconducting cavities at IHEP

Author

He, Feisi, primary, Pan, Weimin, additional, Sha, Peng, additional, Zhai, Jiyuan, additional, Mi, Zhenghui, additional, Dai, Xuwen, additional, Jin, Song, additional, Zhang, Zhanjun, additional, Dong, Chao, additional, Liu, Baiqi, additional, Zhao, Hui, additional, Ge, Rui, additional, Zhao, Jianbing, additional, Mu, Zhihui, additional, Du, Lei, additional, Sun, Liangrui, additional, Zhang, Liang, additional, Yang, Conglai, additional, and Zheng, Xiaobing, additional

Published
2021
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37. Design and Mechanical Performance of a Dressed 166.6 MHz $\beta$=1 Proof-of-Principle Superconducting Cavity in Horizontal Tests

Author

Zhang, Xinying, primary, Zhang, Pei, additional, Li, Zhongquan, additional, Wang, Qunyao, additional, Lin, Haiying, additional, Mi, Zhenghui, additional, Ma, Qiang, additional, Pan, Weimin, additional, Dai, Jin, additional, Huang, Tongming, additional, Han, Ruixiong, additional, Ge, Rui, additional, Sun, Liangrui, additional, Meng, Fanbo, additional, and Li, Dongbing, additional

Published
2020
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39. Design of CEPC superconducting RF system

Author

Zhai, Jiyuan, primary, Gong, Dianjun, additional, Zheng, Hongjuan, additional, Sha, Peng, additional, Ma, Qiang, additional, Mi, Zhenghui, additional, Han, Ruixiong, additional, Meng, Fanbo, additional, Liu, Baiqi, additional, Gao, Jie, additional, and Chi, Yunlong, additional

Published
2019
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41. Design and Mechanical Performance of a Dressed 166.6 MHz β = 1 Proof-of-Principle Superconducting Cavity in Horizontal Tests.

Author

Zhang, Xinying, Zhang, Pei, Li, Zhongquan, Wang, Qunyao, Lin, Haiying, Mi, Zhenghui, Ma, Qiang, Pan, Weimin, Dai, Jin, Huang, Tongming, Han, Ruixiong, Ge, Rui, Sun, Liangrui, Meng, Fanbo, and Li, Dongbing

Subjects
LORENTZ force, LIGHT sources, MAGNETIC structure, STORAGE rings, MAGNETIC shielding
Abstract

Superconducting β = 1 quarter-wave geometry of 166.6 MHz has been proposed as main accelerating cavities for the high-energy photon source (HEPS) storage ring. HEPS is a 6-GeV kilometer-scale synchrotron light source promising ultralow emittance currently being constructed in Beijing. A proof-of-principle cavity has been previously in-house developed and vertical-tested achieving excellent cryogenic performances. A helium jacket was subsequently designed adopting a simple structure and an integrated magnetic field shielding. The mechanical properties of the dressed cavity were largely improved focusing on pressure sensitivity, stress, and Lorentz force detuning, while frequency tunability and microphonics were carefully monitored. Elastic buckling and fatigue were also examined. The helium jacket was later fabricated and welded directly with the niobium cavity. Mounted with an input power coupler and tuners, the dressed cavity was finally assembled in a modified cryomodule and tested at both 4.2 and 2.0 K. The favored low-pressure sensitivity and small Lorentz force detuning were confirmed. Microphonics spectrum was scanned and measured, presenting good consistencies with simulation predictions. Finally, the cavity was successfully tuned to the operating frequency of 166.6 MHz at cold and its frequency could be regulated within a ±3-Hz range. This article covers the mechanical aspects in the development and horizontal cryogenic tests of the first dressed 166.6-MHz superconducting cavity. [ABSTRACT FROM AUTHOR]

Published
2020
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43. CEPC Conceptual Design Report: Volume 2 - Physics & Detector

Author

Guimarães Da Costa, João Barreiro, Gao, Yuanning, Jin, Shan, Qian, Jianming, Tully, Christopher G., Young, Charles, Wang, Lian-Tao, Ruan, Manqi, Zhu, Hongbo, Dong, Mingyi, Ouyang, Qun, Wu, Zhigang, Deng, Zhi, Li, Yulan, Qi, Huirong, Wang, Meng, Fu, Chengdong, Yao, Wei-Ming, Grancagnolo, Franco, Liu, Jianbei, Hu, Tao, Yang, Haijun, Bedeschi, Franco, Ferrari, Roberto, Zhao, Wei, Zhu, Zian, Giacomelli, Paolo, Li, Liang, Li, Fei, Liu, Zhenan, Zhu, Kejun, Hou, Suen, Bozovic Jelisavcic, Ivanka, Li, Gang, Fang, Yaquan, Li, Qiang, Boonekamp, Maarten, Liang, Zhijun, Piccinini, Fulvio, Shi, Xin, Abbrescia, Marcello, Ahmad, Muhammad, Ai, Xiaocong, Albergo, Sebastiano, Aleem, Muhammad Abid, Alexeev, Maxim, Aliev, Malik, Altmannshofer, Wolfgang, Alves, Fábio, An, Fenfen, An, Guangpeng, An, Haipeng, An, Qi, An, Rui, Andreazza, Attilio, Anduze, Marc, Antonello, Massimiliano, Garcia Pascual, Juan Antonio, Antusch, Stefan, Arhrib, Abdesslam, Arkani-Hamed, Nima, Arndt, Kirk, Azzi, Patrizia, Azzurri, Paolo, Palmer, Robert B., Bai, Bowen, Bai, Sha, Bai, Yang, Bai, Yu, Balagura, Vladislav, Balossino, Ilaria, Ban, Yong, Barger, Vernon, Barklow, Timothy, Bartalini, Paolo, Becattini, Francesco, Bellagamba, Lorenzo, Belloni, Alberto, Bencivenni, Giovanni, Berg, J. Scott, Bernius, Catrin, Bertani, Monica, Bertella, Claudia, Bertucci, Michele, Bi, Xiaojun, Bi, Yuanjie, Bian, Ligong, Bian, Tianjian, Bianchi, Fabrizio, Bigi, Ikaros I., Biglietti, Michela, Bignami, Andrea, Bilei, Gianmario, Borgonovi, Lisa, Bortoletto, Daniela, Bortone, Alberto, Boscherini, Davide, Bosotti, Angelo, Boudry, Vincent, Braibant, Sylvie, Bramante, Joseph, Branchini, Paolo, Brient, Jean-Claude, Caccia, Massimo, Cai, Chengfeng, Cai, Hao, Cai, Wenyong, Cai, Xiao, Cai, Yiming, Cai, Yuchen, Cai, Yunhai, Cai, Zhiqiang, Cano Bret, Marc, Cao, Bo, Cao, Dewen, Cao, Jianshe, Cao, Junjie, Cao, Qing-Hong, Carloni Calame, Carlo Michel, Casanova, Raimon, Cavasinni, Vincenzo, Chai, Junying, Chai, Weiping, Chang, Ningbo, Chang, Qin, Chang, Spencer, Chang, We-Fu, Chang, Xuejun, Chang, Yuan-Hann, Chekanov, Sergei, Chen, Bin, Chen, Chunhui, Chen, Fusan, Chen, Gang, Chen, Guoming, Chen, Huan, Chen, Huirun, Chen, Lei, Chen, Liejian, Chen, Mingjun, Chen, Mingshui, Chen, Nian, Chen, Ning, Chen, Shanhong, Chen, Shanzhen, Chen, Shao-Long, Chen, Shaomin, Chen, Shenjian, Chen, Shi, Chen, Wei, Chen, Wen, Chen, Xin, Chen, Xun, Chen, Xurong, Chen, Ye, Chen, Yu, Chen, Yuan, Chen, Yuanbai, Chen, Yukai, Chen, Zhenxing, Cheng, Hao, Cheng, Hsin-Chia, Cheng, Huajie, Cheng, Jian, Cheng, Shan, Cheng, Tongguang, Cheng, Weishuai, Cheong, Sanha, Chi, Yunlong, Chiarello, Gianluigi, Chiesa, Mauro, Chiu, Wen Han, Chou, Weiren, Chu, Chungming Paul, Chu, Ming-Chung, Chu, Xiaotong, Chu, Zhaolin, Chua, Chun-Khiang, Cibinetto, Gianluigi, Ciuchini, Marco, Cobal, Marina, Cochran, James, Coelho Lopes Sa, Rafael, Cossio, Fabio, Craig, Nathaniel, Cui, Han, Cui, Hanhua, Cui, Xiaohao, Cui, Zhaoyuan, Curtin, David, D Agnolo, Raffaele Tito, Dai, Jian-Ping, Dai, Jianping, Dai, Jin, Dai, Lei, Dai, Wei, Dai, Xuwen, Curtis, Stefania, Filippis, Nicola, Lucia, Erika, Mori, Francesca, Delgado, Antonio, Demarteau, Marcel, Deng, Changdong, Deng, Wei-Tian, Destefanis, Marco, Dev, P. S. Bhupal, Di Micco, Biagio, Ding, Ran, Ding, Xuefeng, Ding, Yadong, Da Rocha Rolo, Manuel Dionisio, Domenici, Danilo, Dong, Bingbing, Dong, Chongmin, Dong, Dong, Dong, Haiyi, Dong, Jianing, Dong, Jing, Dong, Lan, Dopke, Jens, Dordevic, Milos, Dos Santos Ramos, Tiago, Draper, Patrick, Drewes, Marco, Du, Mingxuan, Duan, Guang Hua, Eklund, Lars, Eno, Sarah, Erler, Jens, Essig, Rouven, Fan, Jiji, Fan, Shenghong, Fan, Wenjie, Fan, Xiangning, Fang, Shuangshi, Fano, Livio, Farilla, Addolarata, Farinelli, Riccardo, Faus-Golfe, Angeles, Fedderke, Michael A., Felici, Giulietto, Feng, Changqing, Feng, Cunfeng, Feng, Feng, Feng, Jianxin, Feng, Jun, Feng, Tai-Fu, Fischer, Oliver, Flores Castillo, Luis Roberto, Fontanesi, Elisa, Freitas, Ayres, Frotin, M., Frugiuele, Claudia, Fu, Jinyu, Fu, Qibin, Fu, Shinian, Fuchs, Elina, Fukuda, Shigeki, Gabrielli, Emidio, Gaido, Luciano, Gan, Pingping, Gao, Jie, Gao, Jun, Gao, Wu, Gao, Yanyan, Gao, Yu, Garzia, Isabella, Gaudio, Gabriella, Ge, Shao-Feng, Geng, Chao-Qiang, Geng, Huiping, Li-Sheng Geng, Gentile, Simonetta, Giraud, J., Giudice, Gian, Godbole, Rohini M., Gong, Dianjun, Gong, Guanghua, Gong, Hui, Gong, Li, Gong, Lingling, Gori, Stefania, Gou, Quanbu, Greco, Mario, Greco, Michela, Gribanov, Sergei S., Grinstein, Sebastian, Grondin, D., Gu, Jiayin, Gu, Limin, Gu, Pei-Hong, Guidi, Vincenzo, Guo, Fangyi, Guo, Jingyuan, Guo, Jun, Guo, Lei, Guo, Xin, Guo, Yuanyuan, Guo, Zhigang, Gupta, Ramesh, Han, Chengcheng, Han, Dejun, Han, Jinzhong, Han, Liangliang, Han, Ran, Han, Ruixiong, Han, Shuang, Han, Yanliang, Han, Yubo, Hang, Yanfeng, Hao, Jiankui, Hao, Xiqing, He, Dayong, He, Hong-Jian, He, Jibo, He, Jun, He, Min, He, Xiang, He, Xianke, He, Xiaogang, He, Yangle, He, Zhenqiang, Heinemeyer, Sven, Heng, Yuekun, Hong, Daojin, Hong, Jiangliu, Hong, Yang, Hor, Yuenkeung, Hostachy, J. -Y, Hou, Qingbo, Hou, Zhilong, Hsu, Shih-Chieh, Hu, Bitao, Hu, Jifeng, Hu, Jun, Hu, Shouyang, Hu, Shuyang, Hu, Yongcai, Hu, Yu, Hu, Zhen, Hu, Zhongjun, Huang, Chao-Shang, Huang, Fapeng, Huang, Guangshun, Huang, Guo-Yuan, Huang, Jinghui, Huang, Jinshu, Huang, Junjie, Huang, Liangsheng, Huang, Rijun, Huang, Shuhui, Huang, Tongming, Huang, Tuchen, Huang, Xiaozhong, Huang, Xingtao, Huang, Xuguang, Huang, Yanping, Huang, Yongsheng, Huang, Yuyan, Huo, Ran, Ignatov, Fedor V., Iqbal, Munawar, Jackson, Paul, Javaid, Tahir, Ji, Daheng, Ji, Qingping, Ji, Xiaoli, Jia Jia, Jia, Junji, Jia, Yu, Jia, Zihang, Jiang, Jiechen, Jiang, Yun, Jiao, Jianbin, Jin, Dapeng, Jin, Mingjie, Jin, Song, Jin, Yanli, Jin, Yi, Jing, Maoqiang, John, Jaya, Jones, Tim, Ju, Xudong, Jueid, Adil, Jung, Sunghoon, Jyotishmati, Susmita, Kacarevic, Goran, Kane, Gordon, Kang, Wen, Karagoz, Muge, Kato, Chikuma, Ke, Zhiyong, Kharzeev, Dmitri, Khoze, Valentin, Kilic, Can, Kiuchi, Ryuta, Ko, Pyungwon, Kobayashi, Tetsuya, Kong, Panyu, Kong, Shibei, Kopp, Joachim, Kotwal, Ashutosh, Kozaczuk, Jonathan, Kozyrev, Evgeny A., Krasnov, Alexander, Kuflik, Eric, Kuo, Chia-Ming, Kwok, King Wai, Lagarde, Francois, Lai, Pei-Zhu, Laktineh, Imad, Lan, Boyang, Lan, Xiaofei, Lavezzi, Lia, Lee, Seung J., Lei, Ge, Leng, Yongbin, Leung, Sze Ching, Li, Bingzhi, Li, Bo, Li, Boyang, Li, Changhong, Li, Cheng, Li, Congqiao, Li, Dazhang, Li, Dikai, Li, Fengyun, Li, Gexing, Li, Guangrui, Li, Hai-Bo, Li, Haifeng, Li, Haoqing, Li, Hengne, Li, Honglei, Li, Huijing, Li, Jin, Li, Jing, Li, Jinmian, Li, Jinyan, Li, Jungang, Li, Kang, Li, Ke, Li, Li, Li, Lianming, Li, Long, Li, Mengran, Li, Minxian, Li, Peirong, Li, Peiyu, Li, Peng, Li, Qiaodan, Li, Quansheng, Li, Rui, Li, Shaopeng, Li, Shiyuan, Li, Shu, Li, Tianjun, Li, Tong, Li, Weiguo, Li, Wenjun, Li, Xiaoling, Li, Xiaomei, Li, Xiaoping, Li, Xin, Li, Xingguo, Li, Xin-Qiang, Li, Yanwei, Li, Yiming, Ying Li, Li, Ying-Ying, Li, Yufeng, Li, Zhao, Li, Zhenghua, Li, Zhihui, Li, Zhongquan, Li, Ziyuan, Liang, Chaohui, Liang, Hao, Liang, Jing, Liang, Jinhan, Liang, Zuotang, Liao, Hean, Liao, Hongbo, Liao, Jinfeng, Liao, Libo, Liao, Wei, Liao, Yi, Liao, Yunfeng, Lin, Chuangxin, Lin, Hai, Lin, Haiying, Ling, Jiajie, Ling, Pan, Lisanti, Mariangela, Liu, Ao, Liu, Baiqi, Liu, Beijiang, Liu, Bing, Liu, Bo, Liu, Dianyu, Liu, Dong, Liu, Fu-Hu, Liu, Hongbang, Liu, Hu, Liu, Jia, Liu, Jiaming, Liu, Jian, Liu, Jianfei, Liu, Jiangtao, Liu, Jie, Liu, Jindong, Liu, Kexin, Liu, Ling, Liu, Liqiang, Liu, Ming, Liu, Ning, Liu, Peilian, Liu, Qian, Liu, Qingyuan, Liu, Shubin, Liu, Shulin, Liu, Tao, Liu, Weitao, Liu, Wendi, Liu, Xiang, Liu, Xiaohui, Liu, Xin, Liu, Xuesong, Liu, Xuewen, Liu, Xuyang, Liu, Yandong, Liu, Yang, Liu, Yanlin, Liu, Yi, Liu, Yong, Liu, Yudong, Liu, Zengqiang, Liu, Zeyuan, Liu, Zhanfeng, Liu, Zhaofeng, Liu, Zhen, Liu, Zhenchao, Liu, Zhongxiu, Liu, Zuowei, Llorente Merino, Javier, Lo, Cheuk Yee, Logashenko, Ivan B., Long, Andrew, Lou, Xinchou, Low, Ian, Low, Matthew, Lu, Cai-Dian, Lu, Wei, Lu, Weiguo, Lu, Yuanrong, Lu, Yunpeng, Lu, Zhijun, Lukic, Strahinja, Luo, Mingcheng, Luo, Pengwei, Luo, Qing, Luo, Tao, Luo, Xiaofeng, Luo, Yanting, Luo, Zhenhuan, Lyu, Kunfeng, Lyu, Xiaorui, Ma, Huizhou, Ma, Kai, Ma, Lianliang, Ma, Na, Ma, Qiang, Ma, Rui, Ma, Wen-Gan, Ma, Xiao, Ma, Xiaotian, Ma, Xinpeng, Ma, Yanling, Ma, Yanqing, Ma, Yongsheng, Ma, Yue, Ma, Zhongjian, Maggiora, Marco, Magniette, Frédéric, Malamud, Ernie, Mangano, Michelangelo, Mao, Lijun, Mao, Mingling, Mao, Yajun, Mao, Yanmin, Mao, Yanyan, Martin, Adam, Martinez Outschoorn, Verena Ingrid, Matsumoto, Shigeki, Mccullough, Matthew, Mcmahon, Steve, Meade, Patrick, Mele, Barbara, Mellado, Bruce, Men, Lingling, Meng, Cai, Meng, Fanbo, Mezzadri, Giulio, Mi, Zhenghui, Michelato, Paolo, Min, Tianjue, Ming, Lei, Mittal, Monika, Molson, James, Monaco, Laura, Montagna, Guido, Morello, Gianfranco, Moretti, Mauro, Mu, Zhihui, Nanni, Jérome, Neubert, Matthias, Nicrosini, Oreste, Nie, Changshan, Nikitin, Sergei, Ning, Feipeng, Ning, Guo-Zhu, Nishu, Nishu, Niu, Yazhou, Ojalvo, Isobel, Okunev, Ivan, Ospanov, Rustem, Pagani, Carlo, Paganis, Stathes, Panareo, Marco, 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Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), CEPC Study Group, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), and HEP, INSPIRE

Subjects
detector: technology, Higgs particle: particle source, electron positron: storage ring, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], engineering, FOS: Physical sciences, threshold: production, electron positron: annihilation, B-factory, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], accelerator: technology, detector: design, Particle Physics - Phenomenology, new physics, hep-ex, Z0: decay, Higgs-factory, High Energy Physics::Phenomenology, Z0: particle source, hep-ph, electron positron: colliding beams, sensitivity, CEPC, High Energy Physics - Phenomenology, tau: particle source, 240 GeV-cms, vertex: primary, Higgs particle: electroproduction, charm: particle source, High Energy Physics::Experiment, proposed experiment, numerical calculations: Monte Carlo, Z0-factory, performance, Particle Physics - Experiment
Abstract

The Circular Electron Positron Collider (CEPC) is a large international scientific facility proposed by the Chinese particle physics community to explore the Higgs boson and provide critical tests of the underlying fundamental physics principles of the Standard Model that might reveal new physics. The CEPC, to be hosted in China in a circular underground tunnel of approximately 100 km in circumference, is designed to operate as a Higgs factory producing electron-positron collisions with a center-of-mass energy of 240 GeV. The collider will also operate at around 91.2 GeV, as a Z factory, and at the WW production threshold (around 160 GeV). The CEPC will produce close to one trillion Z bosons, 100 million W bosons and over one million Higgs bosons. The vast amount of bottom quarks, charm quarks and tau-leptons produced in the decays of the Z bosons also makes the CEPC an effective B-factory and tau-charm factory. The CEPC will have two interaction points where two large detectors will be located. This document is the second volume of the CEPC Conceptual Design Report (CDR). It presents the physics case for the CEPC, describes conceptual designs of possible detectors and their technological options, highlights the expected detector and physics performance, and discusses future plans for detector R&D and physics investigations. The final CEPC detectors will be proposed and built by international collaborations but they are likely to be composed of the detector technologies included in the conceptual designs described in this document. A separate volume, Volume I, recently released, describes the design of the CEPC accelerator complex, its associated civil engineering, and strategic alternative scenarios., 424 pages

44. First Scan Search for Dark Photon Dark Matter with a Tunable Superconducting Radio-Frequency Cavity.

Author

Tang Z, Wang B, Chen Y, Zeng Y, Li C, Yang Y, Feng L, Sha P, Mi Z, Pan W, Zhang T, Jin Y, Hao J, Lin L, Wang F, Xie H, Huang S, and Shu J

Abstract

Dark photons have emerged as promising candidates for dark matter, and their search is a top priority in particle physics, astrophysics, and cosmology. We report the first use of a tunable niobium superconducting radio-frequency cavity for a scan search of dark photon dark matter with innovative data analysis techniques. We mechanically adjusted the resonant frequency of a cavity submerged in liquid helium at a temperature of 2 K, and scanned the dark photon mass over a frequency range of 1.37 MHz centered at 1.3 GHz. Our study leveraged the superconducting radio-frequency cavity's remarkably high quality factors of approximately 10^{10}, resulting in the most stringent constraints to date on a substantial portion of the exclusion parameter space on the kinetic mixing coefficient ε between dark photons and electromagnetic photons, yielding a value of ε<2.2×10^{-16}.

Published
2024
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