描述了灵敏面积为 10 0 mm× 10 0 mm和 150 mm× 150 mm两维位置灵敏雪崩室。采用分块结构 ,电极从两端分前后点引出 ,增加了延迟线的长度 ,延迟线跨边连接和在大气中直接封真空技术。在流动的 4 2 0 Pa的正庚烷气体中 ,用2 52 Cf裂变源对探测器的性能进行了测试 ,得到Δx=Δy=1mm的位置分辨。 Describes sensitive two-dimensional position-sensitive avalanches with areas of 10 mm × 10 0 mm and 150 mm × 150 mm. The use of block structure, the electrode leads from both ends before and after the point, an increase of the length of the delay line, delay line cross-connection and direct vacuum sealing technology in the atmosphere. The detector performance was tested with a 2 52 Cf fission source in a flowing 4 2 0 Pa n-heptane gas, resulting in a position resolution of Δx = Δy = 1 mm.