New parallel wavelength-dispersive spectrometer based on scanning electron microscope

Area of Science:

• Materials Science and Engineering
• Analytical Chemistry
• Physics

Background:

• Scanning electron microscopy (SEM) is a powerful technique for surface imaging.
• Accurate elemental analysis in SEM often requires specialized X-ray spectroscopy.
• Existing soft X-ray spectrometers have limitations in energy range and resolution.

Purpose of the Study:

• To develop a novel wavelength-dispersive X-ray spectrometer for SEM.
• To extend the capabilities of soft X-ray emission spectroscopy.
• To achieve high energy resolving power for detailed elemental analysis.

Main Methods:

• Development of a new wavelength-dispersive X-ray spectrometer utilizing an array of seventeen reflection zone plates.
• Measurement of soft X-ray emission spectra for elements Li through Ga.
• Utilized a spectrometer with 200 reflection zone plates as a multi-channel analyzer for quasi-continuous spectra.

Main Results:

• The developed spectrometer covers an energy range from 50 eV to 1120 eV.
• Demonstrated overall energy resolving power (E/ΔE) between 80 and 160.
• Achieved a predicted energy-resolving power of E/ΔE = 50 across the entire energy range for quasi-continuous spectra.

Conclusions:

• The new spectrometer significantly enhances soft X-ray emission spectral analysis in SEM.
• The instrument provides high energy resolution for accurate elemental identification.
• This technology advances the capability for detailed elemental composition studies.