基于 FPGA 的在线式海水γ谱仪研制

摘要

针对监测海水中放射性核素活度浓度极低的需求，研制了一种监测海水中放射性活度的γ谱仪。研制中，利用FPGA技术实现了γ谱仪的低功耗和数字化，并具有弱脉冲信号处理、数字采样、堆积判断等功能。实验测试表明：该γ谱仪具有对海水中放射性核素定量分析测量的能力，达到设计要求。%This article mainly introduces the development of a gamma spectrometer , which monitors the radioac-tivity in the seawater , aiming at monitoring extreme low activity and concentration of radioactive nuclide in the seawater .In the development , FPGA technology is applied to realize the low energy consumption and digitali-zation of gamma spectrometer that has the functions of weak pulse signal processing , digital acquisition and pile-up rejection .Test results show that the digital gamma spectrometer has the ability of the quantitative analysis and measurement for the radioactive nuclide in the seawater and this ability meets the design requirements .