Exploration of grid scheme for Frisch-grid ionization chamber Meng Li, Yuansheng Yang, Peng Ma, Junwei Zhang, Zhi Qin, Xianglun Wei, Chaoyuan Xiao, Tianli Qiu, Zhoubo He, Zhixuan He et al. (9 more) Eur. Phys. J. C, 81 12 (2021) 1089 Published online: 10 December 2021 DOI: 10.1140/epjc/s10052-021-09879-y