1. Normal text - click to edit MAPD/MPPC Characterization & Axial PET Dominik.Fehlker@ift.uib.no3.2.2009 1

2. Normal text - click to edit 1. Axial PET Long, axial mounted crystals Dominik.Fehlker@ift.uib.no3.2.2009 2 Radial PET Axial PET

3. Normal text - click to edit 1. Axial PET Dominik.Fehlker@ift.uib.no3.2.2009 3

4. Normal text - click to edit 1. Axial PET Dominik.Fehlker@ift.uib.no3.2.2009 4 Z-coordinate from Wavelength shifting fiber (WLS) strips Scintillation light not reflected in the crystal absorbed by WLS strip -> re- emitted as fluorescence light LYSO crystal and WLS strip readout by Hamamatsu MPPCs http://wwweth.cern.ch/ecal-pictures/PET/PET%20GENERAL/index.htm

5. Normal text - click to edit 1. Axial PET Current status at Cern: Small setup Measurement of coated crystals … Dominik.Fehlker@ift.uib.no3.2.2009 5

6. Normal text - click to edit 1. Axial PET Advantages: Better spatial resolution Identification of Compton effects No parallax error Very good timing resolution Dominik.Fehlker@ift.uib.no3.2.2009 6

7. Normal text - click to edit 2. MAPD Characterisation Cell Same measurements as Hege –Absolute gain –Dark rate –(Photon detection efficiency) Measurements done from dedicated program Dominik.Fehlker@ift.uib.no3.2.2009 7

8. Normal text - click to edit 2. MAPD Characterisation Cell Dominik.Fehlker@ift.uib.no3.2.2009 8 Pulser generator to LED Amplifier NIM discriminator Delay CAEN controller with ADC/QDC Linux PC with measurement software

9. Normal text - click to edit 2. MAPD Characterisation Cell Dominik.Fehlker@ift.uib.no3.2.2009 9 LED Optical filters inside Cooling pipes Heating Elements and Temperature sensor Amplifier

10. Normal text - click to edit 2. MAPD Characterisation Cell To be done: –Temperature control about to be finished –Measurement software to be installed Dominik.Fehlker@ift.uib.no3.2.2009 10