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The progress in the development of the Atmospheric Electron X-ray Spectrometer (AEXS) is described. The AEXS is a surface analysis tool based on excitation of characteristic X-ray fluorescence (XRF) spectra from samples in ambient atmospheres using a focused electron beam. Operation in ambient atmospheres with moderate-to-high spatial resolution in comparison to similar instruments is obtained through...
The progress in the development of the atmospheric electron X-ray spectrometer (AEXS) is described. The AEXS is a surface analysis tool based on excitation of characteristic X-ray fluorescence (XRF) spectra from samples in ambient atmospheres using a focused electron beam. Operation in ambient atmospheres with moderate-to-high spatial resolution in comparison to similar instruments is obtained through...
The progress in the development of the atmospheric electron X-ray spectrometer (AEXS) described. The AEXS is a surface analysis tool based on the excitation of characteristic X-ray and luminescence spectra at ambient pressure using an electron beam. In situ operation for the AEXS is obtained through the use of a thin electron transmissive membrane to isolate the vacuum of the electron source from...
Phase-locked arrays with monolithically integrated diffractive spatial filters are proposed and demonstrated. Noncollinear sets of antiguides separated by a half-Talbot distance favour in-phase mode oscillation. Diffraction-limited fundamental-mode operation is obtained to over twice threshold and in far-field patterns with as much as 75% of the energy in the main lobe.<<ETX>>
A generalised eigenmode analysis of phased-array diode lasers is presented that takes account of modal overlap between adjacent channels. The effect of the overlap is to modify supermode gain splitting nonuniformly. Current spreading suppresses supermode discrimination, resulting in single-lobed far-field operation of arrays with closely spaced lasers.
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