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Advanced BrassBoard of MMRS

The probe and spectrograph have been redesigned with improved optics that provide improved spectral resolution and enable a probe design more compatible with robotic arm deployment.

Electronics have been miniaturized.

Optical fibers & protective sheath passed cold tests.

A TEC cooled CCD was added to enable field testing.


working probe spectrograph miniaturized electronics

Optical fiber cold test

optical fibers protected in stainless steel capillary optical fiber twist test at -40˚C optical fiber stretching test at -70˚C


Whole system cold test at National Ice Core Laboratory

national ice core lab -- exam room using the advanced Brassboard of MMRS to exam ice core from Greenland Obtained ice Raman spectra


Sensitivity & Spectral Resolution

The ADBB has a detection sensitivity ~40% that of our state-of-the-art laboratory Raman system, twice that of previous MMRS brassboard BB1d.
a much improved spectral resolution

Depth of Sampling field

The depth of sampling field varies with mineral color and grain size

Improved general performance

Spectrum of calcite from fine powder (1-5 μm)
Spectrum of calcite from a  highly fluorescent sample
Spectrum of beta-carotene from a biogenetic sample

Point-counting measurements on rocks

Rock samples & % of informative spectra typical spectra

Reference: Haskin et al., abstract # 1651 for 34th LPSC (2003)

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