Computer Science – Performance
Scientific paper
Jan 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977stin...7717985s&link_type=abstract
Unknown
Computer Science
Performance
Gas Ionization, Helium Ions, Hydrogen Ions, Ion Pumps, Jupiter Atmosphere, Mass Spectrometers, Gas Mixtures, Grand Tours, Residual Gas
Scientific paper
The phenomena of ion pumping is reviewed with emphasis on the pumping mechanism for hydrogen and helium. The experimental tests measure the performance of a small, flight proven ion pump which has a nominal four liter/second pumping speed for air. The speed of this pump for hydrogen and helium, and for hydrogen/helium mixes, is presented with particular detail regarding the time dependence. Pump test results are related to anticipated performance of the mass spectrometer by the pumping speeds for the gases to the partial pressure in the ion source. From this analysis, the pump specifications are quantified in terms of mission goals and in terms of observed pumping speeds for the various gases, load levels, and time periods.
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