The ring imaging Cherenkov(RICH) detector for particle identification(PID) is being evaluated for the future super tau-charm facility(STCF) complex. In this work, the prototype readout electronics for the RICH PID det...The ring imaging Cherenkov(RICH) detector for particle identification(PID) is being evaluated for the future super tau-charm facility(STCF) complex. In this work, the prototype readout electronics for the RICH PID detector is designed. The prototype RICH PID detector is based on a thick gas electron multiplier combined with a micromegas detector for Cherenkov light detection. Considering that there will be a large number(~ 690,000) of detector channels in future RICH detector, the readout electronics faces many challenges to precisely measuring time and charge information, such as reducing the noise,increasing density, and improving precision. The requirements of the readout electronics are explored, the downselection of the ASICs is made and thus a prototype readout electronics is designed and implemented. Tests are also conducted to evaluate the performance of the prototype readout electronics, and the results indicate that the time resolution is better than ~ 1 ns(RMS) when the input charge is greater than ~ 12 fC based on the APV25chip, while the time resolution is better than ~ 1 ns(RMS) at an input charge of over ~ 48 fC based on the AGET and STCF ASIC chips, and the equivalent noise charge is better than ~ 0.5 fC(RMS) @ 20 pF based on the three ASICs. The test results indicate that the prototype readout electronics design meets the requirement of the future RICH PID detector and thus provides a reference for future engineering.展开更多
采用光离子化检测器(PID)传感器对挥发性有机化合物(VOC)气体进行检测,通过对PID的研究,自行设计适合本系统的PID检测器结构,并搭建了一套完整的检测系统。通过实验证明:所搭建的以PID检测器为核心的VOC气体检测系统已能够实现对VOC气...采用光离子化检测器(PID)传感器对挥发性有机化合物(VOC)气体进行检测,通过对PID的研究,自行设计适合本系统的PID检测器结构,并搭建了一套完整的检测系统。通过实验证明:所搭建的以PID检测器为核心的VOC气体检测系统已能够实现对VOC气体的定量检测。确定实验流量为160~170 m L/min,且在(0~5)×10-6内传感器响应呈线性关系。展开更多
目的验证设计改进的光催化涂层净化气态有机物能力评价系统,使所设计的光催化评价系统可以准确地表征光催化涂层对如文章中所述0.25μL/L体积浓度级别的微量苯气体的降解情况。方法首次采用PID光离子化检测器在线监测污染物降解效率,并...目的验证设计改进的光催化涂层净化气态有机物能力评价系统,使所设计的光催化评价系统可以准确地表征光催化涂层对如文章中所述0.25μL/L体积浓度级别的微量苯气体的降解情况。方法首次采用PID光离子化检测器在线监测污染物降解效率,并进行了适当的材料及工艺上的改进。实验以两种TiO_2光触媒涂层样品为对象,以苯作为污染物,进行了一系列性能表征实验。结果评价系统性能良好,可以准确地反应出在5~20 W/m^2可见光辐照下,两种不同光触媒涂层样品的光催化效率分别为11.7%~57.3%以及13.4%~67.4%。在实验考察的体积浓度范围0.05~0.4μL/L内,污染物浓度的变化对降解效率影响不大,而随着污染气体流速从30 m L/min增加至90 m L/min,两种涂层对污染物的降解效率变差,分别从43.6%降低到25.9%以及从52.9%降低到29.9%。结论研究设计的光催化涂层评价系统精密准确稳定,其较高的检出限能够很好地满足光催化材料对痕量气态有机污染物降解情况表征的需要,可广泛用于光催化领域气-固两相反应的科学研究及产品评价。展开更多
基金supported by the international partnership program of the Chinese Academy of Sciences under Grant No.211134KYSB20200057Double First-Class university project foundation of USTC+1 种基金Youth Innovation Promotion Association CASCAS Center for Excellence in Particle Physics(CCEPP)。
文摘The ring imaging Cherenkov(RICH) detector for particle identification(PID) is being evaluated for the future super tau-charm facility(STCF) complex. In this work, the prototype readout electronics for the RICH PID detector is designed. The prototype RICH PID detector is based on a thick gas electron multiplier combined with a micromegas detector for Cherenkov light detection. Considering that there will be a large number(~ 690,000) of detector channels in future RICH detector, the readout electronics faces many challenges to precisely measuring time and charge information, such as reducing the noise,increasing density, and improving precision. The requirements of the readout electronics are explored, the downselection of the ASICs is made and thus a prototype readout electronics is designed and implemented. Tests are also conducted to evaluate the performance of the prototype readout electronics, and the results indicate that the time resolution is better than ~ 1 ns(RMS) when the input charge is greater than ~ 12 fC based on the APV25chip, while the time resolution is better than ~ 1 ns(RMS) at an input charge of over ~ 48 fC based on the AGET and STCF ASIC chips, and the equivalent noise charge is better than ~ 0.5 fC(RMS) @ 20 pF based on the three ASICs. The test results indicate that the prototype readout electronics design meets the requirement of the future RICH PID detector and thus provides a reference for future engineering.
文摘采用光离子化检测器(PID)传感器对挥发性有机化合物(VOC)气体进行检测,通过对PID的研究,自行设计适合本系统的PID检测器结构,并搭建了一套完整的检测系统。通过实验证明:所搭建的以PID检测器为核心的VOC气体检测系统已能够实现对VOC气体的定量检测。确定实验流量为160~170 m L/min,且在(0~5)×10-6内传感器响应呈线性关系。
文摘目的验证设计改进的光催化涂层净化气态有机物能力评价系统,使所设计的光催化评价系统可以准确地表征光催化涂层对如文章中所述0.25μL/L体积浓度级别的微量苯气体的降解情况。方法首次采用PID光离子化检测器在线监测污染物降解效率,并进行了适当的材料及工艺上的改进。实验以两种TiO_2光触媒涂层样品为对象,以苯作为污染物,进行了一系列性能表征实验。结果评价系统性能良好,可以准确地反应出在5~20 W/m^2可见光辐照下,两种不同光触媒涂层样品的光催化效率分别为11.7%~57.3%以及13.4%~67.4%。在实验考察的体积浓度范围0.05~0.4μL/L内,污染物浓度的变化对降解效率影响不大,而随着污染气体流速从30 m L/min增加至90 m L/min,两种涂层对污染物的降解效率变差,分别从43.6%降低到25.9%以及从52.9%降低到29.9%。结论研究设计的光催化涂层评价系统精密准确稳定,其较高的检出限能够很好地满足光催化材料对痕量气态有机污染物降解情况表征的需要,可广泛用于光催化领域气-固两相反应的科学研究及产品评价。
