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In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. In 1909, he formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe. However, in 1918, he published his third law of planetary motion, which gives a precise mathematical relationship between a planet's average distance from the Sun and the amount of time it takes to revolve around the Sun. It...
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In the early 17th century, German astronomer and mathematician Johannes Kepler postulated three laws for the motion of planets in the solar system. He formulated his first two laws based on the observations of his forebears, Nikolaus Copernicus and Tycho Brahe.
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A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
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Standoff ultracompact micro-Raman sensor for planetary surface explorations.

M Nurul Abedin, Arthur T Bradley, Anupam K Misra

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    Researchers developed a compact, standoff micro-Raman instrument for NASA missions. This remote sensor uses Raman spectroscopy and laser-induced fluorescence for rapid material identification up to 20 cm away with high resolution.

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    Area of Science:

    • Planetary science
    • Analytical chemistry
    • Spectroscopy

    Background:

    • Traditional micro-Raman systems face limitations in standoff analysis and miniaturization.
    • Future NASA missions require advanced, compact instrumentation for in-situ material characterization.
    • Remote sensing capabilities are crucial for planetary exploration and sample analysis.

    Purpose of the Study:

    • To develop an innovative, ultracompact standoff micro-Raman instrument.
    • To overcome limitations of existing micro-Raman systems for space applications.
    • To demonstrate high-resolution remote sensing of minerals, organics, and biogenic materials.

    Main Methods:

    • Utilized a 532 nm laser and a miniature spectrometer for Raman spectroscopy.
    • Employed inelastic (Raman) light scattering and laser-induced fluorescence.
    • Developed an active remote sensor system for standoff measurements.

    Main Results:

    • Achieved standoff Raman measurements at a 10 cm target distance in daylight.
    • Demonstrated high spatial resolution of 10 micrometers.
    • Acquired Raman spectra using a small, line-shaped laser spot (17.3 micrometers width by 5 mm height).

    Conclusions:

    • The developed ultracompact micro-Raman instrument offers superior capabilities for future NASA missions.
    • The standoff sensing technology enables efficient inspection and identification of diverse materials.
    • This innovation advances remote material analysis for planetary exploration.