Precision voltage-controlled constant current source for atomic oxygen ground simulation equipment

Cao Fei; Cheng Jian; Pan Zeyue; Chen Yuanyuan

doi:10.11884/HPLPB201527.082002

Volume 27 Issue 08

Sep. 2015

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Qing Chun, Wu Xiaoqing, Li Xuebin, et al. Forecast upper air optical turbulence based on weather research and forecasting model[J]. High Power Laser and Particle Beams, 2015, 27: 061009. doi: 10.11884/HPLPB201527.061009

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Cao Fei, Cheng Jian, Pan Zeyue, et al. Precision voltage-controlled constant current source for atomic oxygen ground simulation equipment[J]. High Power Laser and Particle Beams, 2015, 27: 082002. doi: 10.11884/HPLPB201527.082002

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Precision voltage-controlled constant current source for atomic oxygen ground simulation equipment

doi: 10.11884/HPLPB201527.082002

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

Received Date: 2015-02-05
Rev Recd Date: 2015-05-05
Publish Date: 2015-08-11

Abstract

Abstract

In atomic oxygen ground simulation equipment, a current source is used to constrain the emittance of atomic oxygen by utilizing magnetic mirror effect. The current source is also used to calibrate the atomic oxygen parameter measuring instruments. A precision voltage-controlled current source based on the op amp is developed. In order to mitigate the influence of the power supply ripple, a switching power supply filter is developed. The testing results show that the switching power supply filter can reduce the switching power supply noise effectively. The ripple coefficient of +15 V power supply drops to millionth. The constant current source can output a current from 10 pA to 1 A, whose accuracy is 500 fA. Its load stability is excellent.
- atomic oxygen,
- constant current source,
- switching power supply filter,
- operational amplifier,
- ripple

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