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new instrument being developed for PIDDP and DRDF Combination Laser Absorption and Raman IR Spectrometer (CLARIS) for in situ Atmospheric, Particulate, & Mineralogical Studies of Mars
C.R. Webster (PI), R.L. Herman, R.D. May, W.S. Woodward, R.W. Zurek, Y.L. Yung, G.R. Rossman
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new instrument being developed for PIDDP and DRDF
Single TDL near-IR source serves 4 functions:
The Combination Laser Absorption and Raman IR Spectrometer (CLARIS) instrument is a new miniature near-IR spectrometer which combines four-instruments-in-one as a single spectrometer for in situ measurements of atmospheric gas concentrations, dust particulate number densities and size distributions, and surface mineralogical studies of Mars. The all-solid-state spectrometer will combine laser absorption (gas), laser Raman (mineral), laser scattering (particle), and reflectance (mineral) spectroscopy in the near-IR spectral region, and is based on a single tunable diode laser source at 1.3 mm (or in combination with a second source at 0.78 mm). This instrument would be based on a lander (or possibly rover) platform, consume only a few Watts of power, and weigh less than one kilogram. Its development would be applicable to Mars, Titan, and Venus missions.
CLARIS combines laser absorption (gas), laser Raman (mineral), laser scattering (atmospheric dust), and reflectance (mineral) spectroscopic measurements based on a single laser source at 1.37 m m and InGaAs array detection. For the particle measurements, we will modify an existing design at 780 nm wavelength from an earlier mission. For enhanced near-IR reflectance spectroscopy of minerals, additional near-IR light-emitting-diodes (LED’s) will be added. An option of using an additional TDL source at 780 nm, with CCD array detection for Raman and particle measurements, will also be pursued.
One possible optical configuration for a single TDL spectrometer:
