Imaging and timing performance of 1 cm x 1 cm position-sensitive solid-state photomultiplier

P. Dokhale, J. Schmall, C. Stapels, J. Christian, Simon R Cherry, M. R. Squillante, K. Shah

Research output: Contribution to journalArticle

Abstract

We have designed and built a large-area 1cm × 1cm position-sensitive solid-state photomultiplier (PS-SSPM) for use in detector design for medical imaging applications. Our new large-area PS-SSPM concept implements resistive network between the micro-pixels, which are photodiodes operated in Geiger mode, called Geiger Photodiodes (GPDs), to provide continuous position sensitivity. Here we present imaging and timing performance of the large-area PS-SSPM for different temperatures and operating biases to find the optimum operating parameters for the device in imaging applications. A detector module was built by coupling a polished 8 × 8 LYSO array, with 1 × 1 × 20 mm3 elements, to a 1 × 1 cm2 PS-SSPM. Flood images recorded at room temperature show good crystal separation as all 64 elements were separated from each other. Cooling the device at 10 °C showed significant improvement. The device optimum bias voltage was ∼ 4.5V over breakdown voltage. The coincidence timing resolution was improved significantly by increasing the operating bias, as well as by lowering the temperature to 0 °C. Results show excellent imaging performance and good timing response with a large-area PS-SSPM device.

Original languageEnglish (US)
Article numberC02033
JournalJournal of Instrumentation
Volume8
Issue number2
DOIs
StatePublished - Feb 2013

Fingerprint

Photomultipliers
Timing
time measurement
Imaging
solid state
Imaging techniques
Photodiodes
Photodiode
photodiodes
Detectors
Voltage
Detector
Medical imaging
Bias voltage
Electric breakdown
Temperature
detectors
Medical Imaging
Coincidence
electrical faults

Keywords

  • Gamma camera, SPECT, PET PET/CT, coronary CT angiography (CTA)
  • Gamma detectors (scintillators, CZT, HPG, HgI etc)
  • Photon detectors for UV, visible and IR photons (vacuum) (photomultipliers, HPDs, others)
  • Solid state detectors

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics

Cite this

Imaging and timing performance of 1 cm x 1 cm position-sensitive solid-state photomultiplier. / Dokhale, P.; Schmall, J.; Stapels, C.; Christian, J.; Cherry, Simon R; Squillante, M. R.; Shah, K.

In: Journal of Instrumentation, Vol. 8, No. 2, C02033, 02.2013.

Research output: Contribution to journalArticle

Dokhale, P. ; Schmall, J. ; Stapels, C. ; Christian, J. ; Cherry, Simon R ; Squillante, M. R. ; Shah, K. / Imaging and timing performance of 1 cm x 1 cm position-sensitive solid-state photomultiplier. In: Journal of Instrumentation. 2013 ; Vol. 8, No. 2.
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