【摘要】 简要描述了北京谱仪(BES)主漂移室的物理设计、机械设计与建造、工作气体选择、模型实验等方面.给出主室各项指标的实验值或估算值:立体角覆盖、增益和效率、R-φ平面的空间分辨率、轴向空间分辨率dE/dx能量分辨率与粒子鉴别能力等.更多还原

【Abstract】 The main drift chamber of the Beijing Spectrometer (BES) has been described briefly, including its physical design, mechanical design and construction, choice of the working gas as well as prototyping. The performance of the chamber, experimental or expected, has been given: solid angle coverage, gain and efficiency, spatial resolution on the R-φ plane, axial spatial resolution, dE/dx energy resolution and particle identification power, etc.更多还原