| 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. |
Hardware
 |
 |
 |
| 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)
