Data Acquisition and Trigger System of the Gamma Ray Energy Tracking In-Beam Nuclear Array (GRETINA)
Data Acquisition and Trigger System of the Gamma Ray Energy Tracking In-Beam Nuclear Array (GRETINA)
复制标题
伽马射线能量跟踪束内核阵列（GRETINA）数据采集和触发系统
DOI：
10.1109/nssmic.2007.4436499
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发表时间：
2007
影响因子：
1.8
通讯作者：
S. Zimmermann
中科院分区：
文献类型：
--
作者：
John T. Anderson;Renato Brito;D. Doering;Todd Hayden;Bryan Holmes;John Joseph;H. Yaver;S. Zimmermann
设计了一种γ射线能量跟踪束内核阵列（GRETINA），能够确定每个γ射线相互作用点的能量和位置（在2 mm以内），并跟踪多个γ射线相互作用。GRETINA将由七个探测器模块组成，每个模块有四个高纯锗晶体。每个晶体有36段和一个中央接触仪表的电荷敏感放大器。该系统的电子部分由数字化/数字信号处理（DSP）模块和触发定时与控制模块组成。数字转换器/DSP利用以100 MS/s工作的14位模数转换器转换模拟信息，并对数据进行数字处理，以确定伽马与晶体相互作用的能量和定时信息。每个数字化仪/DSP由触发定时和控制系统控制，并通过双向Gbit链路向触发定时和控制系统发送触发信息。目前，四种不同的触发算法被规划用于触发系统，并且可以被选择用于触发决策。本文详细介绍了GRETINA数据采集和触发系统的电子学和算法，并对其性能进行了评述。
The Gamma Ray Energy Tracking In-Beam Nuclear Array (GRETINA), capable of determining the energy and position (within 2 mm) of each gamma-ray interaction point and tracking multiple gamma-ray interactions, has been designed. GRETINA will be composed of seven detector modules, each with four highly pure germanium crystals. Each crystal has 36 segments and one central contact instrumented by charge sensitive amplifiers. Two custom designed modules, the Digitizer/Digital Signal Processing (DSP) and the Trigger Timing and Control, compose the electronics of this system. The digitizer/DSP converts the analog information with 14-bit analog to digital converters operating at 100 MS/s, and digitally processes the data to determine the energy and timing information of the gamma interactions with the crystal. Each Digitizer/DSP is controlled by and sends trigger information to the Trigger Timing & Control system through a bidirectional Gbit link. Presently four different trigger algorithms are planned for the trigger system and can be selected for trigger decision. In this paper the details of the electronics and algorithms of the GRETINA data acquisition and trigger system are presented and the performance is reviewed.