The gamma-ray spectrometer (GRS) is a powerful tool to acquire energy spectra. For the traditional analog GRS based on commercial modules and the digital GRS based on ultra-fast digitization, it is difficult to meet the requirements of high resolution and high throughput simultaneously, and the energy spectrum cannot be obtained in real-time. Besides, energy spectra experiments require the use of radioactive sources. Prolonged exposure to the sources will harm the human body. In this paper, we introduce a digital GRS based on an ordinary analog-to-digital converter (ADC). To avoid human body exposure to radiation in spectra tests, we integrated a digital-to-analog converter based random pulse generator (RPG) on the board to simulate the real nuclear pulses. The algorithms were accomplished by a field-programmable gate array (FPGA). The electronic test results show that the effective number of bits of ADC reaches 11.78 bit, and the spectrometer works well when the average frequenc...

中文翻译：

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基于FPGA的二合一伽玛射线能谱仪和随机脉冲发生器

伽马射线能谱仪（GRS）是获取能量谱的强大工具。传统的基于商业模块的模拟GRS和基于超快速数字化的数字GRS难以同时满足高分辨率和高吞吐量的要求，并且无法实时获得能谱。此外，能谱实验要求使用放射源。长时间暴露于放射源会伤害人体。在本文中，我们介绍了一种基于普通模数转换器（ADC）的数字GRS。为了避免人体在光谱测试中暴露于辐射，我们在板上集成了基于数模转换器的随机脉冲发生器（RPG），以模拟真实的核脉冲。该算法由现场可编程门阵列（FPGA）完成。