This proposal requests partial funding to acquire a new electron microprobe. This new instrument will be placed in the Electron Microprobe Facility at Arizona State University, replacing the existing, 24 year old JEOL 8600 Superprobe and providing a significant increase in analytical capability that will 1) facilitate and benefit current NSF-funded projects, and 2) open up novel research directions unobtainable with the current machine. The Electron Microprobe Facility in the Department of Chemistry & Biochemistry has been a successful multi-disciplinary analytical facility at ASU for over 40 years. The current JEOL 8600 Superprobe (purchased in 1986) has been used as a workhorse instrument critical to the characterization of samples from diverse fields such as archaeology, material science, geology, meteoritics, and biology. The major users of the instrument have historically been from the Earth science-related fields however, and have received the majority of their research funding from NSF-EAR and NASA. The continued success of the facility and its users is dependent on having a stable and reliable microprobe that has modern analytical capability. Relative to our existing microprobe, a new machine has increased capabilities that include: (1) modern wavelength dispersive spectrometers with more efficient diffracting crystals and faster and more precise motors, providing higher signal/noise for both trace and major elements and faster analyses, (2) field emission electron gun technology that allows sub-micron beam size for increased spatial resolution for both quantitative analysis and X-ray mapping/electron imaging, (3) updated, user-friendly interface and analysis software capable of streamlined automated data acquisition, and using up-to-date technologies for data visualization, storage, and transfer, (4) the potential to add more capabilities such as cathodoluminescence, electron back scatter diffraction, and spectrometers having specific use such as optimized light or trace element analytical capabilities, (5) a thoroughly tested platform for which consumables, spare parts, and repair support are readily available. This proposal is part of a multi-agency effort that includes a proposal submitted to the Cosmochemistry program at N.A.S.A., as well as a significant cost share (~15%) commitment from A.S.U.
|Effective start/end date||11/1/10 → 10/31/11|
- National Science Foundation (NSF): $665,000.00