Development of a current measurement system for 4πγ ionization chamber.

• Tác giả: Cong Chen, Shengli Hou, Juncheng Liang, Haoran Liu, Zhijie Yang, Weihua Zeng
• Ngôn ngữ: eng
• Thông tin xuất bản: England : Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine , 2025
• Bộ sưu tập: NCBI
• ID: 254200

Tóm tắt

A current measurement system named ICMS-TIA (Ionization Current Measurement System based on Transimpedance Amplifier) for rapid and accurate measurement of the ionization current of 4πγ ionization chamber is developed based on an improved high-value resistance I-V conversion method with range switching function. The effective measurement range of the ICMS-TIA is from 50 fA to 50 μA and the response time of the system is less than 2.8 s. The test shows that the deviation of the current measurement above 1 pA is less than 0.41%, and the uncertainty over a range of current levels is given. In the linearity tests, the maximum deviation is 1.15 %. These tests indicate that this system can be used for current measurement of 4πγ ionization chamber.