skip to main content

Title: Improved x-ray detection and particle identification with avalanche photodiodes

Avalanche photodiodes are commonly used as detectors for low energy x-rays. In this work, we report on a fitting technique used to account for different detector responses resulting from photoabsorption in the various avalanche photodiode layers. The use of this technique results in an improvement of the energy resolution at 8.2 keV by up to a factor of 2 and corrects the timing information by up to 25 ns to account for space dependent electron drift time. In addition, this waveform analysis is used for particle identification, e.g., to distinguish between x-rays and MeV electrons in our experiment.
Authors:
; ; ; ; ; ; ;  [1] ; ; ; ; ;  [2] ;  [3] ;  [4] ; ;  [3] ;
  1. Max Planck Institute of Quantum Optics, 85748 Garching (Germany)
  2. LIBPhys, Physics Department, Universidade de Coimbra, 3004-516 Coimbra (Portugal)
  3. Laboratório de Instrumentação, Engenharia Biomédica e Física da Radiação (LIBPhys-UNL) e Departamento de Física da Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, Monte da Caparica, 2892-516 Caparica (Portugal)
  4. (France)
Publication Date:
OSTI Identifier:
22392488
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 86; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ELECTRON DRIFT; ENERGY RESOLUTION; MEV RANGE; PARTICLE IDENTIFICATION; PHOTODIODES; SPACE DEPENDENCE; X RADIATION; X-RAY DETECTION