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arXiv · 1509.09021

A 128-channel picoammeter system and its application on charged particle beam current distribution measurements

Deyang Yu·Junliang Liu·Yingli Xue·Mingwu Zhang·Xiaohong Cai·Jianjun Hu·Jinmei Dong·Xin Li
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Abstract

A 128-channel picoammeter system is constructed based on instrumentation amplifiers. Taking the advantages of high electric potential and narrow bandwidth in DC energetic charged beam measurements, current resolution better than 5 fA can be achieved. Two 128-channel Faraday cup arrays are built, and are employed for ion and electron beam current distribution measurements. Tests with 60 keV O3+ ions and 2 keV electrons show that it can provide exact boundaries when a positive charged particle beam current distribution is measured.

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Deyang Yu, Junliang Liu, Yingli Xue, Mingwu Zhang, Xiaohong Cai, Jianjun Hu, Jinmei Dong, Xin Li. 2015-09-30. A 128-channel picoammeter system and its application on charged particle beam current distribution measurements. https://doi.org/10.1063/1.4934849

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