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                        NSSDC Master Catalog Display
                                 Experiment

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Plasma Detectors

NSSDC ID: 76-003A-09
Mission Name: Helios-B
Principal Investigator: Rosenbauer

Description

This experiment (E1) employed three plasma analyzers for positive ions and
one for electrons. All detectors were mounted normal to the spin axis.
Positive ions with energy per charge within the range 0.155 to 15.32 keV/Q
were measured in two angular dimensions using a combination of a
hemispherical, a quadrispherical, and a sinusoidally-shaped electrostatic
analyzer. Electrons with energy from 0.5 to 1660 eV were measured with a
hemispherical electrostatic analyzer in one dimension. The experiment
operated in several modes with differing time resolution depending in
detail on telemetry format and satellite bit rate. Typical time resolution
was on the order of a minute. Also, whenever the special shock alarm mode
was triggered by experiments -04 or -01, high-time-resolution plasma data
for a period starting before and ending after the event were recorded into
spacecraft memory for later transmission. Because the spacecraft body was
coated with a conductive coating, the sheath potentials were about 5 eV,
causing far less degradation in the usefulness of data taken in the lower
electron energy channels than on the Helios-A spacecraft, and almost no
effect on the ion data. For more detailed information see p. 226 of
Raumfahrtforschung, v. 19, n. 5, 1975.
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Discipline(s)

    Space Physics/Heliospheric Studies

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                        NSSDC Master Catalog Display
                            Experiment Personnel

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Plasma Detectors

NSSDC ID: 76-003A-09

Principal Investigator

Dr. Helmut R. Rosenbauer
Max-Planck-Institut fur Aeronomie
Postfach 20
37191 Katlenburg
Germany

Electronic Mail
  ROSENBAUER@LINMPI.DNET.GWDG.DE (INTERNET)
  ECD1::LINMPI::ROSENBAUER (NSI/DECNET)
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Other Investigator

Dr. John H. Wolfe

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Dr. H. Pellkofer
Address Unknown

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NSSDC Contact

Dr. H. Kent Hills
GSFC-Code 633

Electronic Mail
  HILLS@NSSDCA.GSFC.NASA.GOV (INTERNET)
  NSSDCA::HILLS (NSI/DECNET)
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For questions about this experiment, please contact:
Dr. H. Kent Hills, hills@nssdca.gsfc.nasa.gov, (301)296-9431
GSFC-Code 633

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
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NASA Official: J. H. King, king@nssdca.gsfc.nasa.gov
Last Updated: 1995-09-05
Output Generated: 1996-09-25
Programming by: E. V. Bell, II