Tham khảo tài liệu 'photodiodes communications bio sensings measurements and high energy part 15', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | The New Photo-Detectors for High Energy Physics and Nuclear Medicine 271 -o .n. TJ - D _N 7 7 - - Monte Carlo Data f __E- . 450 r Ễ400 350 r U 300 7 J 250 7 j 200 Ị- 150 50 X 0Bd_k. 1 0 . . 0 1 2 3 4 5 6 Energy MIP 1 MIP MeV 0 0 500 1000 Amplitude ADC a b Fig. 11. Response spectrum of a scintillator SiPM detection system to muons in the hadronic calorimeter prototype CALICE 2010 D Ascenzo 2009 . setup is shown in Fig. 9. The 450 GeV proton beam is used on a Beryllium target in order to generate a secondary beam of pions with a wide momentum spectrum in the range between 30 GeV c and 205 GeV c. In addition a muon beam is also available due to contamination of the secondary pion beam. The average muon energy is hence approximately En. A mathematical model of the test setup system based on the GEANT4 simulation framework is also implemented on the basis of the mathematical model of the full detection system. The simulation includes all the detailed components of the test beam experimental setup. The first important goal of experimental study is the verification of the efficient detection of the high energetic particles minimum ionizing particle . as required by the PFA concept. As an example a 12 GeV pion shower identified in the data is shown in Fig. 10. Furthermore muons produced in the hadron shower are also identified as straight tracks which escape from the calorimeter and penetrate the tail catcher D Ascenzo 2009 . The study of the response to muons which mainly deposit energy by the ionization process in the massive volume of matter could give a good experimental evidence. Fig. 11a shows the signal of a single calorimeter scintillator cell read-out by a SiPM produced by 120 GeV muons. On the same plot is presented the Monte Carlo result including the systematic effects of the detector. The experimental results are well described by the mathematical model. The resolution of the . signal in a scintillator .
