Medipix 2 detector applied to low energy electron microscopy


Gastel, R. van and Sikharulidze, I. and Schramm, S. and Abrahams, J.P. and Poelsema, B. and Tromp, R.M. and Molen, S.J. van der (2009) Medipix 2 detector applied to low energy electron microscopy. Ultramicroscopy, 110 (1). pp. 33-35. ISSN 0304-3991

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Abstract:Low energy electron microscopy (LEEM) and photo-emission electron microscopy (PEEM) traditionally use microchannel plates (MCPs), a phosphor screen and a CCD-camera to record images and diffraction patterns. In recent years, however, MCPs have become a limiting factor for these types of microscopy. Here, we report on a successful test series using a solid state hybrid pixel detector, Medipix 2, in LEEM and PEEM. Medipix 2 is a background-free detector with an infinite dynamic range, making it very promising for both real-space imaging and spectroscopy. We demonstrate a significant enhancement of both image contrast and resolution, as compared to MCPs. Since aging of the Medipix 2 detector is negligible for the electron energies used in LEEM/PEEM, we expect Medipix to become the detector of choice for a new generation of systems.
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Copyright:© 2009 Elsevier
Science and Technology (TNW)
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