摘要
A thermal control system （TCS） based on the resistance heating method is designed for the High Energy Detector （HED） on the Hard X-ray Modulation Telescope （HXMT）. The ground-based experiments of the active thermal control for the HED with the TCS are performed in the ambient temperature range from -15 to 20 ℃ by utilizing the pulse width to monitor the interior temperature of a NaI（T1） crystal. Experimental results show that the NaI（T1） crystal＇s interior temperature is from 17.4 to 21.7 ℃ when the temperature of the PMT shell is controlled within （20±3）℃with the TCS in the interesting temperature range, and the energy resolution of the HED is maintained at 16.2% @122 keV, only a little worse than that of 16.0% obtained at 20 ℃. The average power consumption of the TCS for the HED with a low-emissivity shell is about 4.3 W, which is consistent with the simulation.
A thermal control system （TCS） based on the resistance heating method is designed for the High Energy Detector （HED） on the Hard X-ray Modulation Telescope （HXMT）. The ground-based experiments of the active thermal control for the HED with the TCS are performed in the ambient temperature range from -15 to 20 ℃ by utilizing the pulse width to monitor the interior temperature of a NaI（T1） crystal. Experimental results show that the NaI（T1） crystal＇s interior temperature is from 17.4 to 21.7 ℃ when the temperature of the PMT shell is controlled within （20±3）℃with the TCS in the interesting temperature range, and the energy resolution of the HED is maintained at 16.2% @122 keV, only a little worse than that of 16.0% obtained at 20 ℃. The average power consumption of the TCS for the HED with a low-emissivity shell is about 4.3 W, which is consistent with the simulation.
基金
Supported by 973 Program (2009CB824800), NSFC (10978001)
Knowledge Innovation Program of Chinese Academy of Sciences (200931111192010)
