Computer Science – Performance
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsh22b..05w&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SH22B-05
Computer Science
Performance
6215 Extraterrestrial Materials, 2124 Heliopause And Solar Wind Termination, 2144 Interstellar Gas, 2194 Instruments And Techniques
Scientific paper
We have constructed and tested a prototype instrument for the direct measurement of neutral interstellar gas (ISG). The particle detection of this instrument bases on the conversion of energetic neutral atoms to negative ions using surface ionization. Special emphasis was put on the actual conversion surfaces and the relevant energy range for the ISG as seen from a spacecraft (10eV to 1keV). The created negative ions are subsequently coarsely energy analyzed via electrostatic deflection and mass analyzed using the time of flight technique. We present data recorded with this instrument from two calibration facilities providing neutral particle beams. From these data we calculate the detection efficiencies and deduce the expected performance for the direct measurement of the interstellar gas flow on future missions, such as Interstellar Pathfinder, Outer heliospheric Imager, or Interstellar Probe.
Bochsler Peter
Defazio J.
Fuselier Stephen A.
Möbius Eberhard
Quinn John J.
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