II Collaboration

Beamline Volume Relief Analysis for the PIP-II SSR2 Cryomodule at Fermilab

The beam volume of the Pre-Production Single Spoke Resonator type 2 (ppSSR2) cryomodule [1] for the Proton Improvement Plan-II (PIP-II) [2] project will be protected against over-pressurization using a burst disk. This contribution focuses…

Accelerator Physics · Physics 2022-09-14 II Collaboration , M. Parise , D. Passarelli , J. Bernardini

Experience With Machine Protection Systems At PIP2IT

The PIP-II Injector Test 1 PIP2IT facility accelerator was assembled in multiple stages in 2014 $-$ 2021 to test concepts and components of the future PIPII linac that is being constructed at Fermilab. In its final configuration, PIP2IT…

Accelerator Physics · Physics 2022-09-12 II Collaboration , A. Warner , M. Austin , L. Carmichael , J. -P. Carneiro , B. Hanna , E. Harms , R. Neswold , L. Prost , R. Rivera , A. Shemyakin , M. Ibrahim , J. Wu

Study of background from accidental coincidence signals in the PandaX-II experiment

The PandaX-II experiment employed a 580kg liquid xenon detector to search for the interactions between dark matter particles and the target xenon atoms. The accidental coincidences of isolated signals result in a dangerous background which…

High Energy Physics - Experiment · Physics 2022-07-05 II Collaboration , Abdusalam Abdukerim , Wei Chen , Xun Chen , Yunhua Chen , Chen Cheng , Xiangyi Cui , Yingjie Fan , Deqing Fang , Changbo Fu , Mengting Fu , Lisheng Geng , Karl Giboni , Linhui Gu , Xuyuan Guo , Ke Han , Changda He , Di Huang , Yan Huang , Yanlin Huang , Zhou Huang , Xiangdong Ji , Yonglin Ju , Shuaijie Li , Huaxuan Liu , Jianglai Liu , Wenbo Ma , Yugang Ma , Yajun Mao , Yue Meng , Kaixiang Ni , Jinhua Ning , Xuyang Ning , Xiangxiang Ren , Changsong Shang , Lin Si , Guofang Shen , Andi Tan , Anqing Wang , Hongwei Wang , Meng Wang , Qiuhong Wang , Siguang Wang , Wei Wang , Xiuli Wang , Zhou Wang , Mengmeng Wu , Shiyong Wu , Weihao Wu , Jingkai Xia , Mengjiao Xiao , Pengwei Xie , Binbin Yan , Jijun Yang , Yong Yang , Chunxu Yu , Jumin Yuan , Ying Yuan , Xinning Zeng , Dan Zhang , Tao Zhang , Li Zhao , Qibin Zheng , Jifang Zhou , Ning Zhou , Xiaopeng Zhou

Exploring the dark matter inelastic frontier with 79.6 days of PandaX-II data

We report here the results of searching for inelastic scattering of dark matter (initial and final state dark matter particles differ by a small mass splitting) with nucleon with the first 79.6-day of PandaX-II data (Run 9). We set the…

High Energy Physics - Experiment · Physics 2017-12-06 II Collaboration , Xun Chen , Abdusalam Abdukerim , Wei Chen , Yunhua Chen , Xiangyi Cui , Deqing Fang , Changbo Fu , Karl Giboni , Franco Giuliani , Xuyuan Guo , Zhifan Guo , Ke Han , Shengming He , Xingtao Huang , Xiangdong Ji , Yonglin Ju , Shaoli Li , Heng Lin , Huaxuan Liu , Jianglai Liu , Yugang Ma , Yajun Mao , Jinhua Ning , Xiangxiang Ren , Fang Shi , Andi Tan , Cheng Wang , Hongwei Wang , Meng Wang , Qiuhong Wang , Siguang Wang , Xiuli Wang , Xuming Wang , Qingyu Wu , Shiyong Wu , Mengjiao Xiao , Pengwei Xie , Binbin Yan , Yong Yang , Jianfeng Yue , Dan Zhang , Hongguang Zhang , Tao Zhang , Li Zhao , Jifang Zhou , Ning Zhou , Xiaopeng Zhou

Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment

We report a new search of weakly interacting massive particles (WIMPs) using the combined low background data sets in 2016 and 2017 from the PandaX-II experiment in China. The latest data set contains a new exposure of 77.1 live day, with…

Cosmology and Nongalactic Astrophysics · Physics 2017-11-08 II Collaboration , Xiangyi Cui , Abdusalam Abdukerim , Wei Chen , Xun Chen , Yunhua Chen , Binbin Dong , Deqing Fang , Changbo Fu , Karl Giboni , Franco Giuliani , Linhui Gu , Yikun Gu , Xuyuan Guo , Zhifan Guo , Ke Han , Changda He , Di Huang , Shengming He , Xingtao Huang , Zhou Huang , Xiangdong Ji , Yonglin Ju , Shaoli Li , Yao Li , Heng Lin , Huaxuan Liu , Jianglai Liu , Yugang Ma , Yajun Mao , Kaixiang Ni , Jinhua Ning , Xiangxiang Ren , Fang Shi , Andi Tan , Cheng Wang , Hongwei Wang , Meng Wang , Qiuhong Wang , Siguang Wang , Xiuli Wang , Xuming Wang , Qinyu Wu , Shiyong Wu , Mengjiao Xiao , Pengwei Xie , Binbin Yan , Yong Yang , Jianfeng Yue , Dan Zhang , Hongguang Zhang , Tao Zhang , Tianqi Zhang , Li Zhao , Jifang Zhou , Ning Zhou , Xiaopeng Zhou

Dark Matter Results from First 98.7-day Data of PandaX-II Experiment

We report the WIMP dark matter search results using the first physics-run data of the PandaX-II 500 kg liquid xenon dual-phase time-projection chamber, operating at the China JinPing Underground Laboratory. No dark matter candidate is…

High Energy Physics - Experiment · Physics 2016-09-21 II Collaboration , Andi Tan , Mengjiao Xiao , Xiangyi Cui , Xun Chen , Yunhua Chen , Deqing Fang , Changbo Fu , Karl Giboni , Franco Giuliani , Haowei Gong , Shouyang Hu , Xingtao Huang , Xiangdong Ji , Yonglin Ju , Siao Lei , Shaoli Li , Xiaomei Li , Xinglong Li , Hao Liang , Qing Lin , Huaxuan Liu , Jianglai Liu , Wolfgang Lorenzon , Yugang Ma , Yajun Mao , Kaixuan Ni , Xiangxiang Ren , Michael Schubnell , Manbin Shen , Fang Shi , Hongwei Wang , Jiming Wang , Meng Wang , Qiuhong Wang , Siguang Wang , Xuming Wang , Zhou Wang , Shiyong Wu , Xiang Xiao , Pengwei Xie , Binbin Yan , Yong Yang , Jianfeng Yue , Xionghui Zeng , Hongguang Zhang , Hua Zhang , Huanqiao Zhang , Tao Zhang , Li Zhao , Jing Zhou , Ning Zhou , Xiaopeng Zhou

The acceleration of cosmic-ray protons in the supernova remnant RX J1713.7-3946

Protons with energies up to 10^15 eV are the main component[1] of cosmic rays, but evidence for the specific locations where they could have been accelerated to these energies has been lacking[2]. Electrons are known to be accelerated to…

Astrophysics · Physics 2012-08-27 II Collaboration , R. Enomoto