论文标题
通过被动双极网格对离子阻塞的测量
Measurement of the ion blocking by the passive bi-polar grid
论文作者
论文摘要
离子回流是以高活动速率运行时间投影室的主要限制因素。许多实验小组都投入了一项巨大的努力来解决这个问题。本文探讨了基于操作被动双极线网格的解决方案。在存在磁场的情况下，与通过它的电子电流相比，网格更有效地减弱离子电流。针对电子和离子网格的透明胶片用于不同的气体混合物和磁场大小。结果表明，在足够强的磁场中，双极线网格可以用作有效且独立的装置，以抑制时间投影室中的离子回流。
The ion backflow is the main limiting factor for operating time projection chambers at high event rates. A significant effort is invested by many experimental groups to solve this problem. This paper explores a solution based on operating a passive bi-polar wire grid. In the presence of the magnetic field, the grid more effectively attenuates the ion current than the electron current going through it. Transparencies of the grid to electrons and ions are measured for different gas mixtures and magnitudes of the magnetic field. The results suggest that in a sufficiently strong magnetic field, the bi-polar wire grid can be used as an effective and independent device to suppress the ion backflow in time projection chambers.
