Computer Science
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979trw..rept.....f&link_type=abstract
Final Report TRW Defense and Space Systems Group, Redondo Beach, CA.
Computer Science
Abundance, Atomic Spectra, Comets, Laser Plasmas, Mass Spectroscopy, Particulate Sampling, Computerized Simulation, Gas Analysis, High Temperature Plasmas, Ion Motion, Particulates, Ruby Lasers, Time Of Flight Spectrometers
Scientific paper
A concept for determining the relative abundance of elements contained in cometary particulates was evaluated. The technique utilizes a short, high intensity burst of laser radiation to vaporize and ionize collected particulate material. Ions extracted from this laser produced plasma are analyzed in a time of flight mass spectrometer to yield an atomic mass spectrum representative of the relative abundance of elements in the particulates. Critical aspects of the development of this system are determining the ionization efficiencies for various atomic species and achieving adequate mass resolution. A technique called energy-time focus, which utilizes static electric fields to alter the length of the ion flight path in proportion to the ion initial energy, was used which results in a corresponding compression to the range of ion flight times which effectively improves the inherent resolution. Sufficient data were acquired to develop preliminary specifications for a flight experiment.
Friichtenicht J. F.
Miller Daniel J.
Utterback Nyle G.
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