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Charge sharing in double-sided 3D Medipix2 detectors

DOI: 10.1016/j.nima.2009.01.095 DOI Help

Authors: D. Pennicard (University of Glasgow) , C. Fleta (University of Glasgow) , R. Bates (University of Glasgow) , V. O'shea (University of Glasgow) , C. Parkes (University of Glasgow) , G. Pellegrini (CNM-IMB (CSIC)) , L. Lozano (CNM-IMB (CSIC)) , J. Marchal (Diamond Light Source) , N. Tartoni (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nuclear Instruments And Methods In Physics Research Section A , PAGES 412-415

State: Published (Approved)
Published: June 2009

Abstract: 3D detectors are photodiode detectors with n- and p-type electrode columns passing through a silicon substrate. This structure gives a much smaller spacing between the electrodes than in a standard photodiode, greatly reducing the detector's operating voltage and collection time. The device structure also reduces charge sharing between adjacent pixels. This improves the image quality, making these detectors potentially useful for applications such as X-ray diffraction experiments in synchrotrons.A set of silicon detectors with a simplified "double-sided" 3D structure have been fabricated. After being bump-bonded to Medipix2 single-photon-counting readout chips, they have been tested using X-rays and alpha particles. The test results show that the 3D detectors have substantially lower charge sharing than a planar detector of the same thickness. (c) 2009 Elsevier B.V. All rights reserved.

Journal Keywords: Alpha Particles; Electric Potential; Electrodes; Equipment; Images; Photons; Readout Systems; Si Semiconductor Detectors; Silicon; Synchrotrons; Thickness; X Radiation; X-Ray Diffraction

Subject Areas: Technique Development

Instruments: B16-Test Beamline

Added On: 13/10/2009 08:30

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