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MAPD/MPPC Characterization & Axial PET. Dominik.Fehlker@ift.uib.no. 3.2.2009. 1. 1. Axial PET. Long, axial mounted crystals. Radial PET Axial PET. 3.2.2009. Dominik.Fehlker@ift.uib.no. 2. 1. Axial PET. 3.2.2009. Dominik.Fehlker@ift.uib.no. 3. 1. Axial PET.

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Mapd mppc characterization axial pet

MAPD/MPPC Characterization & Axial PET

Dominik.Fehlker@ift.uib.no

3.2.2009

1


1 axial pet

1. Axial PET

Long, axial mounted crystals

Radial PET Axial PET

3.2.2009

Dominik.Fehlker@ift.uib.no

2


1 axial pet1

1. Axial PET

3.2.2009

Dominik.Fehlker@ift.uib.no

3


1 axial pet2

1. Axial PET

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

3.2.2009

  • http://wwweth.cern.ch/ecal-pictures/PET/PET%20GENERAL/index.htm

Dominik.Fehlker@ift.uib.no

4


1 axial pet3

1. Axial PET

Current status at Cern:

Small setup

Measurement of coated crystals

3.2.2009

Dominik.Fehlker@ift.uib.no

5


1 axial pet4

1. Axial PET

Advantages:

Better spatial resolution

Identification of Compton effects

No parallax error

Very good timing resolution

3.2.2009

Dominik.Fehlker@ift.uib.no

6


2 mapd characterisation cell

2. MAPD Characterisation Cell

Same measurements as Hege

Absolute gain

Dark rate

(Photon detection efficiency)

Measurements done from dedicated program

3.2.2009

Dominik.Fehlker@ift.uib.no

7


2 mapd characterisation cell1

2. MAPD Characterisation Cell

Delay

Amplifier

Linux PC with measurement software

Pulser generator to LED

CAEN controller with ADC/QDC

3.2.2009

Dominik.Fehlker@ift.uib.no

NIM discriminator

8


2 mapd characterisation cell2

2. MAPD Characterisation Cell

Amplifier

Heating Elements and

Temperature sensor

Optical filters inside

Cooling pipes

LED

3.2.2009

Dominik.Fehlker@ift.uib.no

9


2 mapd characterisation cell3

2. MAPD Characterisation Cell

To be done:

Temperature control about to be finished

Measurement software to be installed

3.2.2009

Dominik.Fehlker@ift.uib.no

10