Presentation is loading. Please wait.

Presentation is loading. Please wait.

Scintillators testing at Prague Vít Vorobel, Aivaras Zukauskas, Dimitri Mathian Petr Pridal, Fadahat Mamedov Guillaume Lutter, Emmanuel Chauveau Oleg Kochetov.

Similar presentations


Presentation on theme: "Scintillators testing at Prague Vít Vorobel, Aivaras Zukauskas, Dimitri Mathian Petr Pridal, Fadahat Mamedov Guillaume Lutter, Emmanuel Chauveau Oleg Kochetov."— Presentation transcript:

1 Scintillators testing at Prague Vít Vorobel, Aivaras Zukauskas, Dimitri Mathian Petr Pridal, Fadahat Mamedov Guillaume Lutter, Emmanuel Chauveau Oleg Kochetov (Financed by FMP ChU, IEAP CTU, JINR Dubna) V. Vorobel, SuperNEMO meeting, Bordeaux

2 Spectrometers - hysteresis, vacuum, calibration Scintillator testing setup, stability X-wall blocks (Envinet) scan Outline V. Vorobel, SuperNEMO meeting, Bordeaux

3 “Spectrometers” Dubna #1Dubna #2 (in BlackBox)Praha Best reached vacuum ~100 Pa in all three spectrometers V. Vorobel, SuperNEMO meeting, Bordeaux

4 Setup  NEMO3 PMT 5 inch + cookie inside steel tube (mag shielding)  Wrapped scintillator block  Aluminium frame supporting block with PMT  DeltaE detector  m PVT + 2 PMT  Spectrometer  XY-table V. Vorobel, SuperNEMO meeting, Bordeaux

5 Setup  Black Box 100 x 130 x 130 cm  PMTs NEMO-3 5’.  Delta E  m PVT Eljen foil, 2 PMTs in coincidence  Signal readout – Digitizer CAEN V1720, 8 channel, alternatively Amplifier + ADC.  Monoenergetic electron source - “Spectrometer”  Power Suply TTi, PC controlled.  magnet yoke - low hysteresis material.  90Sr, 370MBq  Spectrometer calibration  Si detector, 1 mm thickness, 20 mm2.  207Bi, 100 kBq.  XY-table Range 45 x 45 cm. Control with PC serial port V. Vorobel, SuperNEMO meeting, Bordeaux

6 Calibration  Bi207 used for calibration of Si detector (1 mm thickness)  FWHM ~20 keV at 976 keV V. Vorobel, SuperNEMO meeting, Bordeaux

7 Spectrometer calibration V. Vorobel, SuperNEMO meeting, Bordeaux  FWHM ~30 keV at 1 MeV 260 keV 1440 keV 770 keV 385 keV510 keV 640 keV900 keV 1040 keV1170 keV

8 Hysteresis – Set I = -2 A – Increase gradually current and measure E up (I) – Set I= +2 A – Decrease gradually current and measure E down (I) Electron energy measured with 1 mm Si detector Original yoke Low hyst. yoke V. Vorobel, SuperNEMO meeting, Bordeaux

9 Assembly procedure  Teflon tape 3 layers  Mylar 12  m 2 layers  Optical grease BC V. Vorobel, SuperNEMO meeting, Bordeaux

10 Stabilization Dubna spectrometer #2  Electron energy from spectrometer set 1 MeV  Electrons measured with X-wall block  Peak position vs. time displayed  Stabilization reached in 15 hours V. Vorobel, SuperNEMO meeting, Bordeaux

11 X-wall blocks – Envinet (exposition 20 min.) V. Vorobel, SuperNEMO meeting, Bordeaux

12 V. Vorobel, SuperNEMO meeting, Bordeaux X-wall scintillator # 1 (FWHM at 1 MeV)

13 V. Vorobel, SuperNEMO meeting, Bordeaux X-wall scintillator # 2 (FWHM at 1 MeV)

14 V. Vorobel, SuperNEMO meeting, Bordeaux X-wall scintillator # 3 (FWHM at 1 MeV)

15 Conclusion 15  We are ready to characterise the scintillator blocks  FWHM of 3 X-wall blocks measured % (spectrometer resolution not subtracted), measurement will be repeated Plan  69 X-wall blocks still in Prague  4 of them should be measured in Prague, Bordeaux, UCL for cross-check V. Vorobel, SuperNEMO meeting, Bordeaux

16 Backup V. Vorobel, SuperNEMO meeting, Bordeaux

17 Stabilization 17 Prague spectrometer V. Vorobel, SuperNEMO meeting, Bordeaux

18 Stabilization 18 Dubna spectrometer # V. Vorobel, SuperNEMO meeting, Bordeaux

19 Stabilization 19 Dubna spectrometer # V. Vorobel, SuperNEMO meeting, Bordeaux

20 V. Vorobel, SuperNEMO meeting, Bordeaux

21 V. Vorobel, SuperNEMO meeting, Bordeaux

22 V. Vorobel, SuperNEMO meeting, Bordeaux


Download ppt "Scintillators testing at Prague Vít Vorobel, Aivaras Zukauskas, Dimitri Mathian Petr Pridal, Fadahat Mamedov Guillaume Lutter, Emmanuel Chauveau Oleg Kochetov."

Similar presentations


Ads by Google