Development Of Time Projection Chamberscintillator Detection System For Heavy Ion Charge-Exchange Reaction（~3He，t）

The charge-exchange reaction is a powerful tool to study the spin-isospin coupling nuclei.In this thesis,a TPC-scintillation detection system is designed and built for the measurement of the charge-exchange reaction based on the experimental conditions of heavy ion beams scattering on ~3He target The kinetic zone of the detection system and the performance of particle identification are analyzed within a Geant4 simulation.In the work of TPC research and design,the properties of various working gases were taken in to consider and calculated by Garfiled++.The influence of their parameters on the detector performance was analyzed,and Ar/i C4H10（95:5）was determined as the working gas.Then the electric field of the THGEM detector was calculated by the finite element method.According to the result,the transport process of electron drift diffusion and avalanche in the THGEM detector was simulated in Garfield++.And particularly the influence of the electric field in the sensing region on the electron collection rate was studied for experimental needs.On the experiment side,the curves of gain and energy resolution of the novel DLC-THGEM was measured.The average uniformity of the measured film was within 10%,which achieves the experimental design requirements.The experimental test and calibration of Cs I scintillator with PD readout were also documented in this thesis.The non-uniformity of the six crystals was about 7%,and the average energy resolution was about 14%to an alpha source.Furthermore,this thesis also conducted the numerical investigation of the response of a self-powered neutron detector.The classic analytical model is improved,the transport process of electrons in the material is described based on the result of a Monte-Carlo simulation,and the distribution of electron track length and escape probability is corrected.The calculation result shows that the difference from the experimental measurement results is significantly improved compared with the original model,and the average deviation achieved 4.868%.