Chinese Physics C > 2011, Vol. 35 > Issue(7): 638-641 DOI: 10.1088/1674-1137/35/7/008

A study of the active thermal control for the high energy detector on the HXMT

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Abstract：
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(Tl) crystal. Experimental results show that the NaI(Tl) 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.

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ZHANG Yi-Fei, LI Yan-Guo, WU Bo-Bing, ZHANG Yong-Jie, DONG Yong-Wei, SUN Jian-Chao, ZHAO Dong-Hua, XING Wen, CHAI Jun-Ying, KANG Shi-Xiu and SONG Li-Ming. A study of the active thermal control for the high energy detector on the HXMT[J]. Chinese Physics C, 2011, 35(7): 638-641. doi: 10.1088/1674-1137/35/7/008

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Received: 2010-09-15
Revised: 2010-11-22

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

A study of the active thermal control for the high energy detector on the HXMT

Received Date:2010-09-15

Accepted Date:2010-11-22

Available Online:2011-07-05

Abstract: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(Tl) crystal. Experimental results show that the NaI(Tl) 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.

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