Space environment exploration is a hot topic globally.The scope of space exploration ranges from near-Earth space to the moon,other planets in the solar system,and even the heliosphere and interplanetary space.It is u...Space environment exploration is a hot topic globally.The scope of space exploration ranges from near-Earth space to the moon,other planets in the solar system,and even the heliosphere and interplanetary space.It is used for various crucial applications,including aerospace technology development,space weather research,understanding the origin and evolution of the universe,searching for extraterrestrial life,and finding human livable places.Although China’s space environment exploration started late,its progress has been rapid.China is gradually narrowing the gap with advanced countries and may eventually lead the world in space research.This article briefly reviews the development history of China’s space environmental detectors.展开更多
The aim of this paper is to determine the maximum values of the track length (Lmax) of alpha particles in Nuclear Track Detector (type CR-39) using a new method by taking the relation between the etching time and the ...The aim of this paper is to determine the maximum values of the track length (Lmax) of alpha particles in Nuclear Track Detector (type CR-39) using a new method by taking the relation between the etching time and the diameter square of alpha particle with different energies at constant bulk etch rate VB (1.45 μm/hr) by using TRACK_TEST program from Brun et al. function and Yu et al. function. Using the new equation, the maximum values of the track lengths of alpha particles measured in CR-39 detector have been found to be in a good agreement with the values measured by using Brun et al. function and Yu et al. function in TRACK_TEST program.展开更多
传统的基于帧间非相参积累的检测前跟踪方法对单帧信噪比要求较高,信号有效积累时间较短。提出了一种基于相参积累的粒子滤波检测前跟踪算法,在跟踪算法部分分别对目标时延、速度和强度信息进行采样,得到目标的状态估计;在检测算法部分...传统的基于帧间非相参积累的检测前跟踪方法对单帧信噪比要求较高,信号有效积累时间较短。提出了一种基于相参积累的粒子滤波检测前跟踪算法,在跟踪算法部分分别对目标时延、速度和强度信息进行采样,得到目标的状态估计;在检测算法部分根据目标时延估计重新设计匹配滤波器,并对回波信号再次进行匹配滤波,将回波信号的时延补偿掉,之后进行积累检测。仿真结果表明:在-5 d B这个极低信噪比条件下,该算法具有较高的跟踪精度,延长了信号有效积累时间,提高了信号检测性能。展开更多
Recent progress of study on gas electron multiplier (GEM) has been described. Due to its fast time re-sponse and excellent position sensitivity, the GEM will find wide applications in particle physics, medicine and as...Recent progress of study on gas electron multiplier (GEM) has been described. Due to its fast time re-sponse and excellent position sensitivity, the GEM will find wide applications in particle physics, medicine and as-trophysics. These potential applications have been briefly introduced.展开更多
Background High-voltage CMOS is a promising technology for the pixel sensor of tracking detectors in the collider experiments.Extensive studies are being carried out by theATLASCollaboration to investigate the possibi...Background High-voltage CMOS is a promising technology for the pixel sensor of tracking detectors in the collider experiments.Extensive studies are being carried out by theATLASCollaboration to investigate the possibility of using theHV-CMOS technology in the HL-LHC upgrade of the ATLAS inner tracker detector.Purpose The CaRIBOu(Control and Readout Itk BOards)is a modular test system developed to test the HV-CMOS pixel sensor prototypes and demonstrators.Methods This test system consists of pixel sensor specific front-end chip boards,a control and readout board(CaR board),a central interface board and the back-end DAQ system.Currently,two DAQ solutions are available for the CaRIBOu system,one is based on the FELIX(front-end link eXchange)readout system and the other is based on the Gigabit Ethernet link.Results Various testbeam experiments have been carried out with the CaRIBOu system since 2015 for the pixel sensors fabricated by the AMS HV-CMOS 180 nm and 350 nm technologies.Conclusion The test results show that this test system is very flexible and could be adapted to the test of different pixel sensors with minimum effort,and the performance meets the testbeam requirements.展开更多
文摘Space environment exploration is a hot topic globally.The scope of space exploration ranges from near-Earth space to the moon,other planets in the solar system,and even the heliosphere and interplanetary space.It is used for various crucial applications,including aerospace technology development,space weather research,understanding the origin and evolution of the universe,searching for extraterrestrial life,and finding human livable places.Although China’s space environment exploration started late,its progress has been rapid.China is gradually narrowing the gap with advanced countries and may eventually lead the world in space research.This article briefly reviews the development history of China’s space environmental detectors.
文摘The aim of this paper is to determine the maximum values of the track length (Lmax) of alpha particles in Nuclear Track Detector (type CR-39) using a new method by taking the relation between the etching time and the diameter square of alpha particle with different energies at constant bulk etch rate VB (1.45 μm/hr) by using TRACK_TEST program from Brun et al. function and Yu et al. function. Using the new equation, the maximum values of the track lengths of alpha particles measured in CR-39 detector have been found to be in a good agreement with the values measured by using Brun et al. function and Yu et al. function in TRACK_TEST program.
文摘传统的基于帧间非相参积累的检测前跟踪方法对单帧信噪比要求较高,信号有效积累时间较短。提出了一种基于相参积累的粒子滤波检测前跟踪算法,在跟踪算法部分分别对目标时延、速度和强度信息进行采样,得到目标的状态估计;在检测算法部分根据目标时延估计重新设计匹配滤波器,并对回波信号再次进行匹配滤波,将回波信号的时延补偿掉,之后进行积累检测。仿真结果表明:在-5 d B这个极低信噪比条件下,该算法具有较高的跟踪精度,延长了信号有效积累时间,提高了信号检测性能。
文摘Recent progress of study on gas electron multiplier (GEM) has been described. Due to its fast time re-sponse and excellent position sensitivity, the GEM will find wide applications in particle physics, medicine and as-trophysics. These potential applications have been briefly introduced.
文摘Background High-voltage CMOS is a promising technology for the pixel sensor of tracking detectors in the collider experiments.Extensive studies are being carried out by theATLASCollaboration to investigate the possibility of using theHV-CMOS technology in the HL-LHC upgrade of the ATLAS inner tracker detector.Purpose The CaRIBOu(Control and Readout Itk BOards)is a modular test system developed to test the HV-CMOS pixel sensor prototypes and demonstrators.Methods This test system consists of pixel sensor specific front-end chip boards,a control and readout board(CaR board),a central interface board and the back-end DAQ system.Currently,two DAQ solutions are available for the CaRIBOu system,one is based on the FELIX(front-end link eXchange)readout system and the other is based on the Gigabit Ethernet link.Results Various testbeam experiments have been carried out with the CaRIBOu system since 2015 for the pixel sensors fabricated by the AMS HV-CMOS 180 nm and 350 nm technologies.Conclusion The test results show that this test system is very flexible and could be adapted to the test of different pixel sensors with minimum effort,and the performance meets the testbeam requirements.
