Antineutrino Detectors Vojtech Bednar, Michaela Fendrychova - PowerPoint PPT Presentation

Report from Student Practice at JINR Testing of Scintillation Antineutrino Detectors Vojtech Bednar, Michaela Fendrychova Supevisor: V. Egorov Dzhelepov Laboratory of Nuclear Problems 25.7.2014

Testing of Scintillation Antineutrino Detectors 2 Antineutrino 25.7.2014

Testing of Scintillation Antineutrino Detectors 3 Antineutrino 25.7.2014

Testing of Scintillation Antineutrino Detectors 4 DANSS project 25.7.2014

Testing of Scintillation Antineutrino Detectors 5 Detector Cube 1 m 3 from stripes (100x4x1 cm) or plates (40x20x1 cm) • Plates with different amount of pTP • Our task was to determine which are the best • 25.7.2014

Testing of Scintillation Neutrino Detectors 6 Scintillator plates The best plate – the best energy resolution • Energy resolution depends on the fotoelectron yield • The number of photoelectrons per 1 MeV energy deposit was • measured Different reflective materials were examined • Responce dependence on the energy deposit position • 25.7.2014

Testing of Scintillation Antineutrino Detectors 7 Measurement Signal collected with • optical fibers Troubles with • breaking of fibers 25.7.2014

Testing of Scintillation Antineutrino Detectors 8 Measurement 25.7.2014

Testing of Scintillation Neutrino Detectors 9 Measured spectra Response on 2,2 MeV cosmic muons • 100000 10000 1000 counts plate 100 stripe 10 1 0 200 400 600 800 1000 channel number 25.7.2014

Testing of Scintillation Neutrino Detectors 10 Results Stripes: 10 PE/MeV • Plates: • 45 40 35 PE/MeV 30 none PMT1 25 none PMT2 20 aluminium 15 teflon 10 5 0 0 1 2 3 4 PTP concentration [%] 25.7.2014

Testing of Scintillation Neutrino Detectors 11 Conclusion The best results for plates with 2 % - 2,5% of pTP • Plates are 4x better than stripes • Further step – effect of different POPOP concentration • 25.7.2014

Thank you for your attention

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