Wavelength dispersive x-ray spectrometer with x-ray collimator optic for increased sensitivity over a wide x-ray energy range
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United States of America Patent
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Jul 20, 1999
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N/A
app pub date -
Jan 25, 1999
filing date -
Jan 27, 1998
priority date (Note) -
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Abstract
An x-ray collimator for wavelength dispersive spectroscopy and the like includes a grazing incidence mirror optic having a polycapillary x-ray optic nested therein. The polycapillary x-ray optic is mounted in a hollow bore of the grazing incidence mirror optic so as not to interfere with operation of the grazing incidence mirror. The polycapillary x-ray optic extends the range of the grazing incidence mirror optic to higher energy ranges. The x-ray collimator of the present invention may be employed in a wavelength dispersive x-ray spectrometer including a diffracting element positioned to receive x-rays collimated by the x-ray collimator, and an x-ray detector positioned to receive the x-rays defracted by the diffracting element. A wavelength dispersive x-ray spectrometer in accordance with the present invention may be used in combination with an energy beam microscope, such as an electron microscope, to analyze x-rays emanating from a sample specimen.
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