The Fields instrument is designed to make in-situ measurements of magnetic
fields, electric fields, plasma wave spectra and polarization properties, plasma
density, electron temperature, Poynting flux, spacecraft floating potential, and
solar radio emissions, with the overall objective of measuring the plasma,
fields, and energetic particle environment of the inner heliosphere to study the
mechanisms of coronal heating and the relationship to the coronal magnetic
field. To achieve this, the Fields instrument will measure the coronal magnetic
field from 0 Hz (D.C.) to greater than the electron cyclotron frequency, to map
the coronal magnetic field and characterize magnetized plasma waves.
The instrument comprises five voltage probes, two fluxgate magnetometers, and
one search coil magnetometer. Four of the voltage probes (designated V1 V4) are
2 meter long electric whip antennas protruding out from behind the heat shield
so they are in direct sunlight. They are arranged at 90 degree angles extending
radially from the spacecraft, with 192 cm exposed to full sunlight. The antenna
are 0.32 cm (1/8 inch) diameter niobium C-103 thin-walled tubes. The spacecraft
end of the antenna is clamped to a 30 cm molybdenum stub mounted behind the heat
shield. The signal from the antenna is fed through the stub to a preamplifier.
Sapphire is used to thermally isolate the shield, antenna, and stub from each
other. The V5 voltage probe is mounted on a 3.5 meter boom protruding from the
opposite end of the spacecraft from the heat shield, in the shadow of the heat
shield, and also in the shield plasma wake. The sensor is mounted 308 cm along
the boom from the spacecraft bus, and consists of two short tube sensor elements
jutting out from a small pre-amplifier box.
The two fluxgate magnetometers, MAGi and MAGo, are also mounted on the boom
extending from the back of the spacecraft, MAGi 190 cm along the boom, and MAGo
272 cm from the spacecraft. The magnetometers are triaxial with a dynamic range
of +-65,536 nT and 16 bit resolution. They obtain data at 292.97 samples/second.
The search coil magnetometer consists of 3 sensors mounted orthogonally at the
end of the 3.5 meter boom. The sensors are 10.4 cm long cylinders. Two of the
sensors cover the frequency range 10-50 Hz, the third covers the 10-50 Hz range
and the 1 kHz-1 MHz range.
Version:2.3.0
The Fields instrument is designed to make in-situ measurements of magnetic
fields, electric fields, plasma wave spectra and polarization properties, plasma
density, electron temperature, Poynting flux, spacecraft floating potential, and
solar radio emissions, with the overall objective of measuring the plasma,
fields, and energetic particle environment of the inner heliosphere to study the
mechanisms of coronal heating and the relationship to the coronal magnetic
field. To achieve this, the Fields instrument will measure the coronal magnetic
field from 0 Hz (D.C.) to greater than the electron cyclotron frequency, to map
the coronal magnetic field and characterize magnetized plasma waves.
The instrument comprises five voltage probes, two fluxgate magnetometers, and
one search coil magnetometer. Four of the voltage probes (designated V1 V4) are
2 meter long electric whip antennas protruding out from behind the heat shield
so they are in direct sunlight. They are arranged at 90 degree angles extending
radially from the spacecraft, with 192 cm exposed to full sunlight. The antenna
are 0.32 cm (1/8 inch) diameter niobium C-103 thin-walled tubes. The spacecraft
end of the antenna is clamped to a 30 cm molybdenum stub mounted behind the heat
shield. The signal from the antenna is fed through the stub to a preamplifier.
Sapphire is used to thermally isolate the shield, antenna, and stub from each
other. The V5 voltage probe is mounted on a 3.5 meter boom protruding from the
opposite end of the spacecraft from the heat shield, in the shadow of the heat
shield, and also in the shield plasma wake. The sensor is mounted 308 cm along
the boom from the spacecraft bus, and consists of two short tube sensor elements
jutting out from a small pre-amplifier box.
The two fluxgate magnetometers, MAGi and MAGo, are also mounted on the boom
extending from the back of the spacecraft, MAGi 190 cm along the boom, and MAGo
272 cm from the spacecraft. The magnetometers are triaxial with a dynamic range
of +-65,536 nT and 16 bit resolution. They obtain data at 292.97 samples/second.
The search coil magnetometer consists of 3 sensors mounted orthogonally at the
end of the 3.5 meter boom. The sensors are 10.4 cm long cylinders. Two of the
sensors cover the frequency range 10-50 Hz, the third covers the 10-50 Hz range
and the 1 kHz-1 MHz range.
| Role | Person | |
|---|---|---|
| 1. | PrincipalInvestigator | spase://SMWG/Person/Stuart.D.Bale |
| 2. | MetadataContact | spase://SMWG/Person/James.M.Weygand |
| 3. | MetadataContact | spase://SMWG/Person/Lee.Frost.Bargatze |
Parker Solar Probe Mission Instrument Web Page, NASA Jet Propulsion Laboratory, JPL
Additional information on the Parker Solar Probe Instruments
NSSDC Master Catalog Listing for the Parker Solar Probe Fields Experiment, FIELDS, Instrument Suite, NSSDCA/COSPAR ID: 2018-065A-01
The FIELDS Instrument Suite for Solar Probe Plus. Space Sci Rev, 204(1-4), 49-82, 2016.