Onboard calibration circuit for the DAMPE BGO calorimeter front-end electronics

De-Liang Zhang; Chang-Qing Feng; Jun-Bin Zhang; Qi Wang; Si-Yuan Ma; Zhong-Tao Shen; Di Jiang; Shan-Shan Gao; Yun-Long Zhang; Jian-Hua Guo; Shu-Bin Liu; Qi An

doi:10.1088/1674-1137/40/5/056101

Chinese Physics C> 2016, Vol. 40> Issue(5) : 056101 DOI: 10.1088/1674-1137/40/5/056101

Onboard calibration circuit for the DAMPE BGO calorimeter front-end electronics

De-Liang Zhang ^1,2 ,
Chang-Qing Feng ^1,2,, ,
Jun-Bin Zhang ^1,2 ,
Qi Wang ^1,2 ,
Si-Yuan Ma ^1,2 ,
Zhong-Tao Shen ^1,2 ,
Di Jiang ^1,2 ,
Shan-Shan Gao ^1,2 ,
Yun-Long Zhang ^1,2 ,
Jian-Hua Guo ³ ,
Shu-Bin Liu ^1,2 ,
Qi An ^1,2

1.
Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
2.
State Key Laboratory of Particle Detection and Electronics(IHEP-USTC), Hefei 230026, China
3.
Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China

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Abstract：
DAMPE(DArk Matter Particle Explorer) is a scientific satellite which is mainly aimed at indirectly searching for dark matter in space. One critical sub-detector of the DAMPE payload is the BGO(Bismuth Germanium Oxide) Calorimeter, which contains 1848 PMT(photomultiplier tube) dynodes and 16 FEE(Front-End Electronics) boards. VA160 and VATA160, two 32-channel low power ASICs(Application Specific Integrated Circuits), are adopted as the key components on the FEEs to perform charge measurement for the PMT signals. In order to monitor the parameter drift which may be caused by temperature variation, aging, or other environmental factors, an onboard calibration circuit is designed for the VA160 and VATA160 ASICs. It is mainly composed of a 12-bit DAC(Digital to Analog Converter), an operational amplifier and an analog switch. Test results showed that a dynamic range of 0——30 pC with a precision of 5 fC(Root Meam Square, RMS) was achieved, which covers the VA160's input range. It can be used to compensate for the temperature drift and test the trigger function of the FEEs. The calibration circuit has been implemented for the front-end electronics of the BGO Calorimeter and verified by all the environmental tests for both Qualification Model and Flight Model of DAMPE. The DAMPE satellite will be launched at the end of 2015 and the calibration circuit will operate periodically in space.
- DAMPE ,
- BGO calorimeter ,
- front-end electronics ,
- calibration circuit ,
- VA160

References

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De-Liang Zhang, Chang-Qing Feng, Jun-Bin Zhang, Qi Wang, Si-Yuan Ma, Zhong-Tao Shen, Di Jiang, Shan-Shan Gao, Yun-Long Zhang, Jian-Hua Guo, Shu-Bin Liu and Qi An. Onboard calibration circuit for the DAMPE BGO calorimeter front-end electronics[J]. Chinese Physics C, 2016, 40(5): 056101. doi: 10.1088/1674-1137/40/5/056101

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Received: 2015-07-22
Revised: 2015-12-23

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Supported by Strategic Priority Research Program on Space Science of Chinese Academy of Sciences(XDA04040202-4), and National Basic Research Program(973 Program) of China(2010CB833002) and National Natural Science Foundation of China(11273070)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Onboard calibration circuit for the DAMPE BGO calorimeter front-end electronics

Corresponding author: Chang-Qing Feng,

1. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

2. State Key Laboratory of Particle Detection and Electronics(IHEP-USTC), Hefei 230026, China

3. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China

Received Date: 2015-07-22

Accepted Date: 2015-12-23

Available Online: 2016-05-05

Fund Project: Supported by Strategic Priority Research Program on Space Science of Chinese Academy of Sciences(XDA04040202-4), and National Basic Research Program(973 Program) of China(2010CB833002) and National Natural Science Foundation of China(11273070)

Abstract: DAMPE(DArk Matter Particle Explorer) is a scientific satellite which is mainly aimed at indirectly searching for dark matter in space. One critical sub-detector of the DAMPE payload is the BGO(Bismuth Germanium Oxide) Calorimeter, which contains 1848 PMT(photomultiplier tube) dynodes and 16 FEE(Front-End Electronics) boards. VA160 and VATA160, two 32-channel low power ASICs(Application Specific Integrated Circuits), are adopted as the key components on the FEEs to perform charge measurement for the PMT signals. In order to monitor the parameter drift which may be caused by temperature variation, aging, or other environmental factors, an onboard calibration circuit is designed for the VA160 and VATA160 ASICs. It is mainly composed of a 12-bit DAC(Digital to Analog Converter), an operational amplifier and an analog switch. Test results showed that a dynamic range of 0——30 pC with a precision of 5 fC(Root Meam Square, RMS) was achieved, which covers the VA160's input range. It can be used to compensate for the temperature drift and test the trigger function of the FEEs. The calibration circuit has been implemented for the front-end electronics of the BGO Calorimeter and verified by all the environmental tests for both Qualification Model and Flight Model of DAMPE. The DAMPE satellite will be launched at the end of 2015 and the calibration circuit will operate periodically in space.

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Onboard calibration circuit for the DAMPE BGO calorimeter front-end electronics

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