Large-area pixellated photon counting X-ray imaging system

G Iles, K Mathieson, P Murray, S Passmore, M Prydderch, P Seller, S Thomas

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A large-area pixellated photon counting imaging system, primarily for synchrotron radiation research, is under development. An area of 300 mm]300 mm will be covered by tiling many modules. A module will comprise a 64]448
array of 150 lm]150 lm silicon pixels covering an area of 9.6 nm]67.2 mm. This will be #ip chip bonded to 7 ALADIN readout chips, that each contain a 64]64 array of 144 mm]150 lm pixels. Each readout pixel comprises a pre-ampli"er,
shaper, discriminator, 15-bit counter and 5-bit register that enables threshold adjust, pixel masking and calibrate control. Each pixel is designed to operate at &1 MHz providing a count rate capability of &109 cm~2 s~1. The system will
operate in the energy range from 4 to 25 keV and at a frame rate of up to 1 kHz. The current status of the project is reported, along with the detector guard structure chosen to minimise the dead region around the active volume of the
silicon detectors.
Original languageEnglish
Pages (from-to)427-430
Number of pages4
JournalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume458
Issue number1-2
DOIs
Publication statusPublished - 1 Feb 2001

Keywords

  • pixellated photon
  • X-ray imaging
  • photons

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