摘要
伽马暴偏振探测仪POLAR-2主要用于伽马射线暴瞬时辐射的高精度偏振测量。为了提高偏振测量精度和样本,需要获取伽马暴的高精度方向和能谱信息。POLAR-2中能谱探测器BSD载荷将实现10~2000 keV能量范围内的伽马暴能谱测量且具有在轨快速触发和定位的功能。设计了基于FPGA的数据传输和计算的触发软件测试系统,可以在没有探测器输入的情况下,通过以太网传输测试数据,验证BSD触发算法的可行性和性能。当给出相邻光子的间隔时间和每个光子的能量后,通过该系统可以得到不同时标下各能量段的信噪比和光变,与模拟计算的光变和信噪比进行比对之后,可以在BSD早期的设计中验证该触发算法的准确性。测试结果表明,该系统满足设计要求,可以方便地在地面验证和调整触发算法。
POLAR-2,a gamma-ray burst polarization detector,is mainly used for the polarization measurement of gamma-ray bursts(GRB)prompt emissions with high precision.In order to improve the polarization measurement accuracy and samples of GRB,it is necessary to obtain the location and energy spectrum of GRB with high precision.For POLAR-2,the Broad-band Spectrum Detector payload,as called BSD,can measure the GRBs spectrum in the energy range of 10~2000 keV and has the function of GRB fast triggering and localization in orbit.This paper presents the design of a triggerring software test system based on FPGA for data transmission and calculation,which can transmit the test data through Ethernet without the real data input from the detector to verify the feasibility and performance of the trigger algorithm of BSD.For the given time interval between each two adjacent photons and energy of each photon of the test data,the signal-to-noise ratio and light curve for each energy channel under different time scales can be obtained by this system.To compare with the simulated light curve and signalto-noise ratio,the accuracy of the triggering algorithm of BSD can be verified at the early design phase.The test results show that the system meets the design requirements and can verify and adjust the trigger algorithm conveniently on the ground.
作者
吴佩莲
刘江涛
孙建超
赖万昌
何江
梁秀佐
王源浩
WU Peilian;LIU Jiangtao;SUN Jianchao;LAI Wanchang;HE Jiang;LIANG Xiuzuo;WANG Yuanhao(Chengdu University of Technology,Chengdu 610059,China;Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《核电子学与探测技术》
CAS
北大核心
2023年第6期1221-1228,共8页
Nuclear Electronics & Detection Technology
基金
国家自然科学基金资助(11961141013)
中国科学院高能物理研究所谢家麟基金(2019IHEPZZBS111)。
关键词
伽马暴探测
触发算法
以太网传输
信噪比
gamma-ray burst detection
trigger algorithm
ethernet transmission
signal-to-noise ratio
