【摘要】 大型高海拔空气簇射观测站(LHAASO)的所有探测器都将在羊八井进行宇宙线探测工作,其工作环境为高海拔(海拔4 300 m)、低气压(大气压强0.6 atm)、昼夜温差大(温度-25~40℃)。即便如此,探测器依然要求稳定运行,为了保证光电倍增管的增益变化在5%以内,高压电源模块的温度系数和纹波系数要分别小于0.01%/℃和0.01%。为此,搭建了模拟试验系统,其试验箱中的温度和气压均可控。不同厂家不同型号的电源模块在模拟试验箱中进行了测试,试验结果表明,3个厂家的电源模块均满足要求。更多还原

【Abstract】 The Large High Altitude Air Shower Observatory( LHAASO) detectors would be operated at Yangbajing,under the condition of high altitude( 4300m,0. 6atm) and large dynamic temperature variation( from-25°C to 40°C). To keep the gains of the photomultiplier tubes used stable within 5%,it is required that the temperature coefficient and ripple index of the power supplies should be less than 0. 01% / C and 0. 01%,respectively. Different types of power supplies were tested in an environment simulation system,where the temperature and air pressure are controllable,three of which meet the requirements and are chosen as the candidates.更多还原