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Content archived on 2022-12-23

Ultrafast Position-Sensitive Detectors on the Basis of New Avalanche Micropixel Photodiodes with Single Photon Detection Efficiency and with High Amplitude Resolution for Visible and UV Light

Objective

The goal of the project is the development of an ultra fast (sub-nsec), low-cost, position-sensitive detector on the basis of new avalanche micro-pixel photodiodes with high photon detection efficiency for visible and UV light. The detector module consists of the novel avalanche micro-pixel photodiode (AMPD) working in single photon detection mode (Geiger mode). As an example of practical application a combination with a scintillator array will be studied. The AMPD with high gain (up to 10^6) will be produced using a new approach to the design of avalanche photodiodes. This approach is based on a local negative feedback (LNF) effect, which significantly reduces the excess noise factor introduced by the avalanche process. The LNF effect is achieved by forming an electric field with a specific geometry in the multilayer silicon structure, which ensures the localization of the avalanche processes and limits them to the micro regions (micro-pixels) with a diameter of 3 - 30 um depending of the design. The multichannel AMPD modules with the above mentioned parameters have a high potential for commercial applications. They will be the basic element for the construction of large area position-sensitive detectors for positron emission tomography in biology and medical diagnostics. The basic photo detector array will also be a key element for light detection in astronomy, astroparticle- and high-energy physics and radiation monitoring (for example in safety surveillance at airports).

Call for proposal

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Funding Scheme

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Coordinator

Paul Scherrer Institut
EU contribution
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Address
Villigen 33
5232 Villigen
Switzerland

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Total cost
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Participants (6)