Kuno-Group D1 Nguyen Duy Thong CALCULATION OF DETECTOR ACCEPTANCE FOR MEASURING MUON LIFETIME IN MUSIC BEAM TEST BY GEANT4 OUTLINE Introduction Results Summary INTRODUCTION MuSIC facility The process in MuSIC facility: At first, protons are accelerated in the MuSIC facility. Then, they will impact with a target to produce p+ or p–. m+, m– are emitted in p+, p– in the decay process. Last, particles will be detected by detector. detector target proton Particles (m+, m) are detected by a detector with 2 scintillators and 1 target. The detector consists of 2 scintillators and 1 target. 2 scintillators have same size 380x50x3.5 mm3 Target is made of Mg. The size of target: 370x80x20mm3 In this study, by using Geant4 simulation: First, without using dipole magneticfield(By=0T), the acceptance of detector is determined. Using dipole magnetic-field (By = ±0.04T), evaluate the acceptances of detector. MOTIVATION Evaluate efficiency of muon between beamline and captured muon. Consider about detector acceptance. Detector acceptance is defined as ratio between number of detected e+ or e– and number of incident m+ or m–at detector. RESULTS For By=0T, 0.1mA-proton beam impacts with target, from Geant4, some results were calculated p+ pー Beamline 4949 1249 Sci 1 663 130 Sci 2 187 38 m+ mー e+ 10128 2024 0 1530 277 335 352 68 212 eー 0 335 329 The efficiency of m eff m + number of detect ed at Sci1m + 1530 0.151 15.1% + number of beamlinem 10128 eff m number of detect ed at Sci1m 277 0.1369 13.7% number of beamlinem 2024 The detector acceptance + number of detect ed e at Sci1 and Sci2 335+ 212 Pm + e + ) 0.054 5.4% + number of beamlinem 10128 number of detected -eat Sci1 and Sci2 335+ 329 Pm e ) 0.328 32.8% number of beamlinem 2024 For By=+0.04T p+ pー Beamline 1957 1550 Sci 1 222 315 Sci 2 46 125 m+ mー e+ eー 5461 2306 0 0 690 402 441 382 149 131 274 219 The efficiency of m effm + number of detected at Sci1m + 690 0.1264 12.64% + number of beamlinem 5461 effm number of detected at Sci1m - 402 0.1743 17.43% number of beamlinem 2306 The detector acceptance + number of detect ed e at Sci1 and Sci2 441+ 274 Pm + e + ) 0.1309 13.09% + number of beamlinem 5461 number of detect ed eat Sci1 and Sci2 382+ 219 Pm e ) 0.2606 26.06% number of beamlinem 2306 For By=–0.04T p+ pー Beamline 7745 545 Sci 1 1232 57 Sci 2 400 10 m+ mー e+ eー 13073 1248 0 0 2158 139 1269 709 564 26 847 363 The efficiency of m eff m + number of detect ed at Sci1m + 2158 0.165 16.5% + number of beamlinem 13073 effm number of detected at Sci1m - 139 0.1113 11.13% number of beamlinem 1248 The detector acceptance number of det ect ed +e at Sci1 and Sci2 1269+ 847 Pm e ) 0.1618 16.18% number of beamlinem + 13073 + + number of det ect ed eat Sci1 and Sci2 709+ 363 Pm e ) 0.859 85.9% number of beamlinem 1248 SUMMARY In this research, with 0.1mA-proton beam, numbers of p+,p,m+,m,e+,eー were estimated The detector acceptances were calculated. Next step • Some features need to be improved to ensure simulation better. THANK YOU FOR YOUR ATTENTION BACKUP By = 0T Beamline Sci 1 Sci 2 663 Stop at Sci1 44 187 Stop at Sci2 34 p+ 4949 pー m+ mー e+ 1249 10128 2024 0 130 1530 277 335 16 444 43 16 38 352 68 212 7 73 12 5 eー 0 335 0 329 0 By=+0.04 Beamline T Sci 1 Stop at Sci 1 Sci 2 Stop at Sci 2 p+ 1957 222 16 46 13 pー 1550 315 9 125 10 m+ 5461 690 188 149 36 mー 2306 402 50 131 11 e+ 0 441 4 274 3 eー 0 382 0 219 0 By= ー0.04T Beamline Sci 1 Stop at Sci1 Sci 2 Stop at Sci 2 p+ 7745 1232 73 400 27 pー 545 57 4 10 1 m+ 13073 2158 496 564 90 mー 1248 139 34 26 2 e+ 0 1269 14 847 9 eー 0 709 0 363 0