研制了以电荷分配法读出的大型单阳极丝位置灵敏探测器,其灵敏面积为1200×60mm~2。阳极丝采用φ10μm的镍铬合金丝,电阻率为12Ω/mm,两阴极面采用12.5μm的单面蒸铝Mylar膜。工作气体为70％Ar+30％CH_4,在一个大气压下,自然流气式工作。测量前在探测器前窗上贴上1.2m的标尺,将约5MeV的~(241)Amα源,放在一个准直器上,该准直器可以在探测器前窗上面准确、自由地平移。在沿阳极丝方向上,每隔6cm测量一个点,共测量了19个点,测得的平均位置分辨(FWHM)约为0.6mm;最大积分非线性好于0.2％。该探测器已经装配在北京Q3D磁谱仪全焦面探测器系统上准备在串列加速器上进行束流试验。 A large single anode position sensitive detector read by charge distribution method was developed. Its sensitive area is 1200 × 60mm ~ 2. Anode wire with φ10μm Ni-Cr alloy wire, resistivity of 12Ω / mm, the cathode side with 12.5μm single-sided aluminum vapor Mylar film. Working gas is 70% Ar + 30% CH_4, at atmospheric pressure, the natural flow of gas work. Before measuring, attach a 1.2m scale to the front window of the detector and place a ~ (241) Amα source of about 5MeV on a collimator that can be accurately and freely translated over the front window of the detector . A total of 19 points were measured every 6 cm in the direction of the anode wire. The measured average position resolution (FWHM) was about 0.6 mm. The maximum integral nonlinearity was better than 0.2%. The detector has been assembled in Beijing Q3D magnetic spectrometer full focal detector system ready for beam experiments on the tandem accelerator.