The circumference of CEPC (Circular Electron Positron Collider) is 100 km, with two interaction points available for exploring different detector design scenarios and technologies. Two common RF stations are deployed for the Higgs operation, which result in 286 beam bunches evenly distributed over a half ring. While for W and Z operations, independent RF cavities are used, 5220 and 10900 bunches are spreading in equal distance over the full ring, respectively. Therefore, the bunch spacing are about 500 ns, 50 ns and 30 ns for Higgs, W and Z operations, respectively. Aimed to the CDR (Concept Design Report) and TDR (Technical Design Report) of the CEPC project, the feasibility study of TPC (Time Projection Chamber) tracker detector was initiated for the purpose to identify feasible technology options and to gain expertise to build the detector units which meet the basic requirements of the CEPC detector design. The TPC detector at the proposed circular collider will have to be operated continuously and the backflow of ions (IBF (Ions Back Flow)) must be minimized without the open/close time of a gating device technology. The gain of the selection detector module can be achieved up to about 5000 without any obvious discharge behaviour. The currents on the anode and drift cathode were measured precisely with an electrometer. The experimental results showed that IBF can be reduced to less than 0.1% at the specific gain. All update IBF results have been measured using 266 nm UV (Ultra Violet) light, ⁵⁵Fe and X-ray tube. The future R&D has been mentioned to meet the high luminosity at Z.

CEPC（圆形电子正对撞机）的周长为100公里，有两个相互作用点可用于探索不同的探测器设计方案和技术。希格斯（Higgs）操作部署了两个常见的RF站，这导致286个束均匀地分布在半环上。在进行W和Z操作时，使用了独立的RF腔，而5220和10900束束分别以相等的距离分布在整个环上。因此，希格斯的束间距约为500 ns，50 ns和30 ns，w ^ 和 ž操作。针对CEPC项目的CDR（概念设计报告）和TDR（技术设计报告），启动了TPC（时间投影室）跟踪器检测器的可行性研究，目的是确定可行的技术选择并获得专业知识来构建符合CEPC探测器设计基本要求的探测器单元。建议的圆形对撞机上的TPC检测器必须连续运行，并且必须在没有门控设备技术的打开/关闭时间的情况下将离子的回流（IBF（离子回流））最小化。选择检测器模块的增益可以达到约5000，而不会出现任何明显的放电行为。用静电计精确测量阳极和漂移阴极上的电流。0.1％以特定的收益。所有的更新IBF结果均使用266 nm UV（超紫）光测量，⁵⁵铁和 X射线管。未来[R ＆d 被提到满足高亮度 ž。