CAMECA SX100 Electron Microprobe
The Cameca SX-100 electron microprobe (EMP) in the Department of Earth & Planetary Sciences, University of Tennessee at Knoxville, is equipped with 4 wavelength dispersive spectrometers (WDS), a PGT Sahara energy dispersive spectrometer (EDS), plus cathodoluminescence (CL) and high-speed backscattered electron (BSE) detectors. The Cameca is controlled by the PC-based "Peaksight" software, and is internet-connected for efficient data and image transfer.
- Analysis of elements ranging in atomic number from Be to U
- Analysis of elements ranging in concentration from 100% to 10 ppm
- Automated full matrix corrections using the PAP, Pouchou & Pichoir (1987) model
- Analysis of up to 40 elements per analytical point
- Cutting with a saw and trimming to a size that can be mounted.
- Mounting in one of two ways:
- Into a resin block: the sample is placed in a circular mold and impregnated with a resin. This option allows for additional imaging with an optical microscope using reflected light.
- Onto a glass slide: the sample is affixed to a standard size 1 inch glass slide with resin for further lapping and polishing. This method allows imaging to be achieved using both transmitted and reflected light microscopy.
Prior to analysis of most samples - particularly those containing minerals – the specimen disk will need to be coated with a thin film of conducting media to dissipate excess charge produced by the electron beam. Usually carbon is used, and the film is typically 30 nanometers thick.
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Information for Lab users:
- Departmental users
- Students who wish to learn to use this Electron Microprobe for their research should enroll in the Fall course EPS-568 (Geochemical Analysis) by Molly McCanta.
- All users must have prior EMP experience.
- Collaborative Research with other institution is welcome.
- The scheduling of lab time should be discussed with lab manager.
- Commercial Users should first contact Molly McCanta.