【摘要】 介绍了球载硬Ｘ射线天文望远镜（ＨＡＰＩ－４）的大面积多丝正比室新的电子学系统，所设计的高压电源、高压分配器、电荷灵敏前置放大器、主放大器等单元电路，有效地降低了输出噪声、抑制了能谱畸变，提高了能量分辨率。充３０４ｋＰａ氙气，阳极丝单丝和编组输出，６０ｋｅＶ能量分辨率分别可达７％和８％。更多还原

【Abstract】 The new developed electronics system of large area MWPC, HAPI-4 Balloon borne Hybrid Hard X ray Astronomy Telescope, is introduced. The circuit units, such as HV powers, HV distributors, charge sensitive pre amplifiers main amplifiers etc., have successfully reduced the output noise, restrained the abnormality of the energy spectra, and improved the overall energy rsolution. Filled with 3 atm Xe, the MWPC overall energy resolution of single wire and wire group can reach 7% and 8% respectively at 60 kV.更多还原