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Helios 2 E1 Plasma Experiment

ResourceID
spase://SMWG/Instrument/Helios2/E1

Description

E1 plasma experiment aboard the Helios solar probes consists of four independent instruments designed to investigate the solar wind plasma.
By measuring the velocity distribution functions of the different kinds of particles, all important hydrodynamic parameters of the solar wind plasma can be derived.
Three instruments (I1a, I1b, and I3) analyze the positive components (protons and heavier ions with energy-per-charge values from 0.155 to 15.32 kV) of the solar wind.
Two of them allow for an angular resolution in both directions of incidence. The experiment employed a combination of a hemispherical, a quadrispherical, and a sinusoidally-shaped electrostatic analyzer.

All detectors were mounted normal to the spin axis.

One instrument (I2) measures electrons in the energy range from 0.5 the 1660 eV with one-dimensional angular resolution
using a hemispherical electrostatic analyzer.

For more detailed information see p. 226 of Raumfahrtforschung, v. 19, n. 5, 1975.

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Details

Version:2.0.0

Instrument

ResourceID
spase://SMWG/Instrument/Helios2/E1
ResourceHeader
ResourceName
Helios 2 E1 Plasma Experiment
AlternateName
Helios 2 E1
ReleaseDate
2009-05-20 21:10:15Z
Description

E1 plasma experiment aboard the Helios solar probes consists of four independent instruments designed to investigate the solar wind plasma.
By measuring the velocity distribution functions of the different kinds of particles, all important hydrodynamic parameters of the solar wind plasma can be derived.
Three instruments (I1a, I1b, and I3) analyze the positive components (protons and heavier ions with energy-per-charge values from 0.155 to 15.32 kV) of the solar wind.
Two of them allow for an angular resolution in both directions of incidence. The experiment employed a combination of a hemispherical, a quadrispherical, and a sinusoidally-shaped electrostatic analyzer.

All detectors were mounted normal to the spin axis.

One instrument (I2) measures electrons in the energy range from 0.5 the 1660 eV with one-dimensional angular resolution
using a hemispherical electrostatic analyzer.

For more detailed information see p. 226 of Raumfahrtforschung, v. 19, n. 5, 1975.

Acknowledgement
User will acknowledge the Helios 2 Plasma Experiment PI F. H. R. Rosenbauer in any publication resulting from the use of these data.
Contacts
RolePersonStartDateStopDateNote
1.DataProducerspase://SMWG/Person/Rainer.Schwenn
2.PrincipalInvestigatorspase://SMWG/Person/Helmut.R.Rosenbauer
InstrumentType
ElectrostaticAnalyser
InvestigationName
E1 Plasma Experiment
ObservatoryID