Thick gas electron multipliers (THGEMs) are new types of gas detectors with merits such as a high counting rate,anti-radiation,high gain,robustness and relatively low cost.We establish an up-down THGEM detector hodosc...Thick gas electron multipliers (THGEMs) are new types of gas detectors with merits such as a high counting rate,anti-radiation,high gain,robustness and relatively low cost.We establish an up-down THGEM detector hodoscope system for detecting and displaying muon tracks.Muon tracks can be well observed with the detectors and the present study lays an important technological foundation for the domestic and mass production of THGEMs.展开更多
The working stability of thinner-thick gaseous electron multipliers （THGEMs）, which have been developed by the University of the Chinese Academy of Sciences and the Second Academy of China＇s Aerospace Science and I...The working stability of thinner-thick gaseous electron multipliers （THGEMs）, which have been developed by the University of the Chinese Academy of Sciences and the Second Academy of China＇s Aerospace Science and Industry Corporation, is studied with an 8 keV x-ray on a Cu target. Gains of about 103–104 are achieved with a single board in Ar：iC4H10 （97：3）. Environmental factors, such as pressure, temperature and humidity are considered. The thinner-THGEMs are shown to perform stably over two months of studies.展开更多
Data quality monitoring （DQM） plays an important role in data taking at the BESⅢ experiments.DQM is used to monitor detector status and data quality.A DQM framework （DQMF） has been developed to make it possible t...Data quality monitoring （DQM） plays an important role in data taking at the BESⅢ experiments.DQM is used to monitor detector status and data quality.A DQM framework （DQMF） has been developed to make it possible to reuse the BESⅢ offline reconstruction system in the online environment.In this framework,the DQMF can also simulate a virtual data taking environment,transfer events to the event display,publish histograms to a histogram presenter in a fixed interval,and dump histograms into a ROOT file.The DQMF has been stably running throughout BESⅢ data taking.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 10775181 and 10775151.
文摘Thick gas electron multipliers (THGEMs) are new types of gas detectors with merits such as a high counting rate,anti-radiation,high gain,robustness and relatively low cost.We establish an up-down THGEM detector hodoscope system for detecting and displaying muon tracks.Muon tracks can be well observed with the detectors and the present study lays an important technological foundation for the domestic and mass production of THGEMs.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11205240 and 11265003, and the China Postdoctoral Science Foundation under Grant No 2012M510587.
文摘The working stability of thinner-thick gaseous electron multipliers （THGEMs）, which have been developed by the University of the Chinese Academy of Sciences and the Second Academy of China＇s Aerospace Science and Industry Corporation, is studied with an 8 keV x-ray on a Cu target. Gains of about 103–104 are achieved with a single board in Ar：iC4H10 （97：3）. Environmental factors, such as pressure, temperature and humidity are considered. The thinner-THGEMs are shown to perform stably over two months of studies.
基金Supported by Ministry of Science and Technology of China (2009CB8252000)Joint Funds of National Natural Science Foundation of China (11079008)+2 种基金Chinese Academy of Science (CAS) Large-Scale Scientific Facility Program100 Talents Program of CASNatural Science Foundation of China (10605030)
文摘Data quality monitoring （DQM） plays an important role in data taking at the BESⅢ experiments.DQM is used to monitor detector status and data quality.A DQM framework （DQMF） has been developed to make it possible to reuse the BESⅢ offline reconstruction system in the online environment.In this framework,the DQMF can also simulate a virtual data taking environment,transfer events to the event display,publish histograms to a histogram presenter in a fixed interval,and dump histograms into a ROOT file.The DQMF has been stably running throughout BESⅢ data taking.
