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
Background The Cylindrical Gas ElectronMultiplier Inner Tracker(CGEM-IT)is one of the candidates for the replacement of the current BESIII inner drift chamber,which has developed serious aging effects due to beam-rela...Background The Cylindrical Gas ElectronMultiplier Inner Tracker(CGEM-IT)is one of the candidates for the replacement of the current BESIII inner drift chamber,which has developed serious aging effects due to beam-related backgrounds.Purpose To build a full digitization model,it is necessary to understand the electron drift behavior and signal induction.Methods A simulation study based on Garfield++and ANSYS software has been performed.Results Parameters describing the Lorentz angle,diffusion effect,drift time,multiplication,and induction are obtained from the Garfield++simulation.Based on these results,a preliminary digitization model is implemented in the BESIII offline software system.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.
基金Funding was provided by National Natural Sci-ence Foundation of China(NSFC)under Contracts Nos.11575222,11475208,11775245,11335009,U1832204,and 11521505National Key Basic Research Program of China under Contract No.2015CB856706+2 种基金Chinese Academy of Sciences(CAS)President’s International Fellowship Initiative underContract No.2018PM0004European Com-mission under Contract No.H2020-MSCA-RISE-2014National 1000Talents Program of China,and U.S.Department of Energy under Con-tract No.DE-FG02-05ER41374.
文摘Background The Cylindrical Gas ElectronMultiplier Inner Tracker(CGEM-IT)is one of the candidates for the replacement of the current BESIII inner drift chamber,which has developed serious aging effects due to beam-related backgrounds.Purpose To build a full digitization model,it is necessary to understand the electron drift behavior and signal induction.Methods A simulation study based on Garfield++and ANSYS software has been performed.Results Parameters describing the Lorentz angle,diffusion effect,drift time,multiplication,and induction are obtained from the Garfield++simulation.Based on these results,a preliminary digitization model is implemented in the BESIII offline software system.
