An Accurate Low Current Measurement Circuit for High-Resolution Energy Spectroscopy Systems

Authors

  • Pierre Hypolite Bakoune University of Douala, Cameroon
  • Evariste Wembe Tafo University of Douala, Cameroon
  • Adolphe Moukengue Imano University of Douala, Cameroon
  • Arlette Joelle Mouen Mouangue University of Douala, Cameroon
  • Lucas Kana Kemgang University of Douala, Cameroon

Keywords:

Low beam current, I/V Converter, Operational amplifier, Bandwidth

Abstract

With the development of radioactive ion beam physics, heavy-ion beams have been applied to the treatment of deep-seated inoperable tumors in the therapy terminal of the Heavy ion Research Facility in Lanzhou (HIRFL) located at the Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS). An accurate low current measurement circuit was developed to monitor the beam current at 10fA range. The circuit consisted of a low current high sensitivity I/V converter with a dynamic bandwidth. A low offset voltage precision amplifier and new guarding and shielding techniques were used in the I/V converter circuit which allowed as to measure current up to 10fA with a current gain of 0.43 V/fA and noise less than 50 fA. This paper will also show a T-network configuration which was used for boosting bandwidth.

Author Biographies

Pierre Hypolite Bakoune, University of Douala, Cameroon

Departement of Physics

 

Lab.Electronic and Instrumentation

Rank 1

Evariste Wembe Tafo, University of Douala, Cameroon

Departement of Physics

 

Lab. Electronic and Instrumentation

Rank 2

Adolphe Moukengue Imano, University of Douala, Cameroon

Departement of Physics


Lab. Electronic and Instrumentation

Rank 3

Arlette Joelle Mouen Mouangue, University of Douala, Cameroon

Departement of Physics


Lab. Electronic and Instrumentation

Rank 3

Lucas Kana Kemgang, University of Douala, Cameroon

Departement of Physics


Lab. Electronic and Instrumentation

Rank 3

References

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Published

2016-01-05

How to Cite

Bakoune, P. H., Wembe Tafo, E., Moukengue Imano, A., Mouen Mouangue, A. J., & Kana Kemgang, L. (2016). An Accurate Low Current Measurement Circuit for High-Resolution Energy Spectroscopy Systems. Asian Journal of Applied Sciences, 3(6). Retrieved from https://www.ajouronline.com/index.php/AJAS/article/view/3472

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