--------------------------------------------------------- NSSDC Master Catalog Display Experiment --------------------------------------------------------- Charged Particle Composition NSSDC ID: 72-012A-02 Mission Name: Pioneer 10 Principal Investigator: Simpson Description This experiment (carried also on Pioneer 11) measured charged-particle composition and spectra using four detector systems: (1) the main telescope, consisting of seven elements and providing energy spectra (approximately 3 to 68 MeV for protons and 10 to 150 MeV/nucleon for oxygen), element resolution (through oxygen), and isotope resolution (for H and He); (2) the low-energy subsystem telescope, consisting of two elements and using a very small thin first element to extend the high-sensitivity proton measurements below 1 MeV (0.3 to 9 MeV) in the presence of a high gamma-ray background aboard the spacecraft; (3) the electron-current detector (ECG), consisting of a beryllium-shield silicon detector operated in current mode to measure high fluxes of electrons with energies above 3 MeV; and (4) the fission cell detector, recording fission fragments from the nucleon-induced fission of thorium 232 sandwiched between two large-area silicon detectors to measure fluxes of protons (above 30 MeV) in the presence of high fluxes of electrons. The experiment sample time was synchronized with the spacecraft spin, permitting sectoring of the readout of the main and low-energy telescopes into eight octants about the spin axis. Data also include the interplanetary region. ------------------- Discipline(s) Planetary Science/Fields and Particles Space Physics/Heliospheric Studies --------------------------------------------------------- NSSDC Master Catalog Display Experiment Personnel --------------------------------------------------------- Charged Particle Composition NSSDC ID: 72-012A-02 Principal Investigator Prof. John A. Simpson LASR University of Chicago 933 East 56th Street Chicago, IL 60637 Electronic Mail SIMPSON@ODYSSEUS.UCHICAGO.EDU (INTERNET) LASR::SIMPSON (NSI/DECNET) ----- Other Investigator Mr. Anthony J. Tuzzolino LASR University of Chicago 933 East 56th Street Chicago, IL 60637 Electronic Mail TUZZOLINO@ODYSSEUS.UCHICAGO.EDU (INTERNET) LASR::TUZZOLINO (NSI/DECNET) ----- Dr. J. J. O'Gallagher Address Unknown ----- NSSDC Contact Dr. John F. Cooper GSFC-Code 632 Electronic Mail JCOOPER@NSSDCA.GSFC.NASA.GOV (INTERNET) NCF::JCOOPER (NSI/DECNET) ----- --------------------------------------------------------------------------- For questions about this experiment, please contact: Dr. John F. Cooper, jcooper@nssdca.gsfc.nasa.gov, (301)286-1193 GSFC-Code 632 For questions about the NSSDC's information systems, please contact: Dr. James Thieman, thieman@nssdca.gsfc.nasa.gov, (301)286-9790 National Space Science Data Center, Code 633.2 NASA/Goddard Space Flight Center, Greenbelt, MD 20771 --------------------------------------------------------------------------- NASA Official: J. H. King, king@nssdca.gsfc.nasa.gov Last Updated: 1995-08-23 Output Generated: 1996-09-16 Programming by: E. V. Bell, II