Digital signal processing for segmented HPGe detectors preprocessingalgorithms and pulse shape analysis
Digital signal processing for segmented HPGe detectors preprocessingalgorithms and pulse shape analysis
复制标题
分段 HPGe 探测器的数字信号处理预处理算法和脉冲形状分析
DOI：
10.11588/heidok.00004991
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发表时间：
2004
影响因子：
3.3
通讯作者：
M. Lauer
中科院分区：
文献类型：
--
作者：
M. Lauer
MINIBALL是一种多功能谱仪，由24个纵向六重分段HPGe探测器组成，用于有效探测放射性离子束核反应中的稀有衰变。MINIBALL是第一台配备数字电子设备的光谱仪。在数字信号处理器上实现了确定伽马射线相互作用位置的脉冲形状分析算法，并在使用准直伽马射线源的实验中进行了验证。重点放在不同的数字信号处理算法的属性，实施的后果和位置确定的适用性。下一代伽马射线光谱仪将由配备数字电子设备的高度分段HPGe探测器组成，与当前的光谱仪相比，复杂性增加了十倍以上。为了能够建造伽马射线跟踪光谱仪，将开发新的强大的数字电子设备。预处理算法，给出伽马射线能量和产生事件触发器，在配备快速A/D转换器的VME模块上实现，并使用不同的探测器和源进行测试。重点是对算法的详细模拟和理解，以及电子学和探测器对能量分辨率的影响
MINIBALL is an versatile spectrometer consisting of 24 longitudinally six-fold segmented HPGe detectors, build for the efficient detection of rare decays in nuclear reactions of radioactive ion beams. MINIBALL was the first spectrometer equipped with digital electronics. Pulse shape analysis algorithms to determine the interaction position of gamm-rays were implemented on a Digital Signal Processor and validated in an experiment using a collimated gamma-ray source. Emphasis was placed on the properties of the different digital signal processing algorithms, the consequences for the implementation and the applicability for position determination. The next generation of gamma-ray spectrometers will consist of highly segmented HPGe detectors equipped with digital electronics, resulting in a more than ten-fold increase in complexity compared to current spectrometers. To enable the construction of a gamma-ray tracking spectrometer, new and powerful digital electronics will be developed. Preprocessing algorithms, giving the gamma-ray energy and generating event triggers, were implemented on a VME module equipped with fast A/D converters and tested with different detectors and sources. Emphasis was placed on the detailed simulation and understanding of the algorithms as well as the influence of electronics and detector onto the energy resolution