In this work,a new hybrid MPGD consisting of two GEM foils and a metallic mesh was proposed.Based on the simulation studies,this design can significantly reduce the rise time of signal and has a better performance in ...In this work,a new hybrid MPGD consisting of two GEM foils and a metallic mesh was proposed.Based on the simulation studies,this design can significantly reduce the rise time of signal and has a better performance in respect of particle identification compared with the triple GEM design.The gain with various voltages setting was computed in order to provide us references for future experiment.The simulation results also show that the time and space resolution compared to the triple GEM detector are also improved.The time and space resolution of hybrid detector with Ar/CO_2(70/30) and Ar/isobutane(95/5) were investigated for various drift electric field intensities.This new hybrid detector shows excellent potential for both fundamental research and imaging applications.展开更多
微结构探测器是目前国际上气体探测器研究的热点,但普通微结构探测器的性能无法满足核保障等研究领域对能量分辨的要求。为此团队自主研制了一种高能量分辨MicroMegas探测器。通过建立测试系统对探测器进行测试,发现其性能不仅取决于探...微结构探测器是目前国际上气体探测器研究的热点,但普通微结构探测器的性能无法满足核保障等研究领域对能量分辨的要求。为此团队自主研制了一种高能量分辨MicroMegas探测器。通过建立测试系统对探测器进行测试,发现其性能不仅取决于探测器本身的制作工艺,还与系统的使用及测试方法紧密相关。为充分发挥探测器性能,需要对气体探测器性能影响的各方面因素进行测试与分析,建立数据库,优化测试系统和实验条件。在上述研究基础上,利用^(55)Fe放射源在Ar+5%iC_4H_(10)的气体下对原子能院制作的MicroMegas进行能量分辨测试,在5.9 ke V能量下获得能量分辨的平均值为11.7%,与目前国际上微结构探测器的最好水平持平。通过优化测试系统和实验条件,能够获得更加稳定的探测器性能,更容易在核保障、核物理与辐射探测领域推广。展开更多
A scalable readout system （SRS） is designed to provide a general solution for different micro-pattern gas detectors in various applications. The system mainly consists of three kinds of modules： the ASIC card, the ...A scalable readout system （SRS） is designed to provide a general solution for different micro-pattern gas detectors in various applications. The system mainly consists of three kinds of modules： the ASIC card, the adapter card and the front-end card （FEC）. The ASIC cards, mounted with particular ASIC chips, are designed for receiving detector signals. The adapter card is in charge of digitizing the output signals from several ASIC cards. The FEC, edged-mounted with the adapter, has field-programmable gate array （FPGA）-based reconfigurable logic and I/O interfaces, allowing users to choose different ASIC cards and adapters for different experiments, which expands the system to various applications. The FEC transfers data through Gigabit Ethernet protocol realized by a TCP processor （SiTCP） IP core in FPGA. By assembling a flexible number of FECs in parallel through Gigabit Ethernet, the readout system can be tailored to specific sizes to adapt to the experiment scales and readout requirements. In this paper, two kinds of multi-channel ASIC chip, VA140 and AGET, are applied to verify the scalability of this SRS architecture. Based on this VA140 or AGET SRS, one FEC covers 8 ASIC （VA140） cards handling 512 detector channels, or 4 ASIC （AGET） cards handling 256 detector channels, respectively. More FECs can be assembled in crates to handle thousands of detector channels.展开更多
基金Supported by the National Natural Science Foundation of China(Nos.11135002,11275235,11405077 and 11575073)
文摘In this work,a new hybrid MPGD consisting of two GEM foils and a metallic mesh was proposed.Based on the simulation studies,this design can significantly reduce the rise time of signal and has a better performance in respect of particle identification compared with the triple GEM design.The gain with various voltages setting was computed in order to provide us references for future experiment.The simulation results also show that the time and space resolution compared to the triple GEM detector are also improved.The time and space resolution of hybrid detector with Ar/CO_2(70/30) and Ar/isobutane(95/5) were investigated for various drift electric field intensities.This new hybrid detector shows excellent potential for both fundamental research and imaging applications.
文摘微结构探测器是目前国际上气体探测器研究的热点,但普通微结构探测器的性能无法满足核保障等研究领域对能量分辨的要求。为此团队自主研制了一种高能量分辨MicroMegas探测器。通过建立测试系统对探测器进行测试,发现其性能不仅取决于探测器本身的制作工艺,还与系统的使用及测试方法紧密相关。为充分发挥探测器性能,需要对气体探测器性能影响的各方面因素进行测试与分析,建立数据库,优化测试系统和实验条件。在上述研究基础上,利用^(55)Fe放射源在Ar+5%iC_4H_(10)的气体下对原子能院制作的MicroMegas进行能量分辨测试,在5.9 ke V能量下获得能量分辨的平均值为11.7%,与目前国际上微结构探测器的最好水平持平。通过优化测试系统和实验条件,能够获得更加稳定的探测器性能,更容易在核保障、核物理与辐射探测领域推广。
基金Supported by National Natural Science Foundation of China(11222552)
文摘A scalable readout system （SRS） is designed to provide a general solution for different micro-pattern gas detectors in various applications. The system mainly consists of three kinds of modules： the ASIC card, the adapter card and the front-end card （FEC）. The ASIC cards, mounted with particular ASIC chips, are designed for receiving detector signals. The adapter card is in charge of digitizing the output signals from several ASIC cards. The FEC, edged-mounted with the adapter, has field-programmable gate array （FPGA）-based reconfigurable logic and I/O interfaces, allowing users to choose different ASIC cards and adapters for different experiments, which expands the system to various applications. The FEC transfers data through Gigabit Ethernet protocol realized by a TCP processor （SiTCP） IP core in FPGA. By assembling a flexible number of FECs in parallel through Gigabit Ethernet, the readout system can be tailored to specific sizes to adapt to the experiment scales and readout requirements. In this paper, two kinds of multi-channel ASIC chip, VA140 and AGET, are applied to verify the scalability of this SRS architecture. Based on this VA140 or AGET SRS, one FEC covers 8 ASIC （VA140） cards handling 512 detector channels, or 4 ASIC （AGET） cards handling 256 detector channels, respectively. More FECs can be assembled in crates to handle thousands of detector channels.
