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2014-02-31-stroeve

Seasonal Arctic summer ice extent still hard to forecast.

A new study lead by Prof Julienne Stroeve says year-to-year forecasts of the Arctic’s summer ice extent are not yet reliable.
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Scanning Electron Microscope (S.E.M) Laboratory

  • Location: Room OG2, Ground Floor, Kathleen Lonsdale Building
  • Telephone Extension: 32413
  • Laboratory Manager: Professor Peter Sammonds
  • For SEM Bookings please contact: Jim Davy
  • For use of the SEM stage modules please contact: John Bowles

SEM

The laboratory houses a Jeol JSM-6480LV high-performance, Variable Pressure Analytical Scanning Electron Microscope with a high resolution of 3.0nm, along with EDS (Energy Dispersive System) and EBSD (Electron Backscatter Diffraction) using the Oxford Link system.

The low vacuum mode, allows for observation of specimens which cannot be viewed at high vacuum due to excessive water content or due to a non-conductive surface. Its asynchronous five-axis eucentric stage with compeucentric rotation and tilt can accommodate a specimen of up to 8-inches in diameter. Standard automated features include Auto Focus/Auto Stigmator, Auto Gun (saturation and alignment), and Automatic Contrast and Brightness.

Dynamic studies with microstructural information are possible in the SEM, using mechanical testing apparatus and/or heating stages.

The SEM stage modules allows tensile, compression and/or bending tests, with load ranges from less than 2N to 5000N. Software control allows different modes of operation and micro-cracks or other microscopic features can be followed as the test progresses. Heated and heated/cooled grips, or platforms are available for temperature dependent studies and tilted stage and grip options are available for dynamic EBSD studies.

The SEM facilities are available for use by both members of UCL Earth Sciences and external users.

List of current SEM charges.


UCL Earth Sciences · Gower Street London WC1E 6BT · +44 (0)20 7679 2363
earthsci@ucl.ac.uk · more