CHARGE NEUTRALISATION
The patented AXIS charge neutralisation system provides charge compensation on all types of insulating materials which is particularly important when using a monochromatic x-ray source. Charge neutralisation is achieved by low energy electrons therefore causing no damage to the surface of the sample. Simple ‘on for acquisition’ type operation means that no optimisation of neutraliser operating parameters is required when changing samples so that acquisition from insulating samples may be automated and data acquired unattended. The example shows an optical image of a bundle of cellulose fibres in the analysis position of the Ultra DLD together with a high energy resolution C1s spectrum. Excellent charge neutralisation of a traditionally challenging topographic sample is demonstrated by the energy resolution and FWHM of the various components under the carbon envelope.

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