Geometrical non-uniformities in the sensitivity of polycrystalline diamond radiation detectors

D. Tromson, A. Brambilla, F. Foulon, C. Mer, B. Guizard, R. Barrett, P. Bergonzo

    Research output: Contribution to journalArticlepeer-review

    20 Scopus citations

    Abstract

    Chemical vapour deposited (CVD) diamond is a remarkable material for the fabrication of photon and particle detectors. However, little is known about the perturbations induced by the polycrystalline nature of this material. For this purpose, we have used a micrometer size X-ray beam generated from a synchrotron light source to induce photocurrents in a CVD diamond-based detector. By comparing the measured currents in the device as the beam interaction position is moved on the sample with the topographical image of the surface observed using a scanning electron microscope (SEM), a significant non-uniformity has been observed that could be correlated with the grain structure.

    Original languageBritish English
    Pages (from-to)1850-1855
    Number of pages6
    JournalDiamond and Related Materials
    Volume9
    Issue number11
    DOIs
    StatePublished - 2000

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