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THEMIS-A: Solid State Telescope (SST): Energy flux spectrogram, electron/ion ground-calculated fluxes (30 keV - 300 keV).

ResourceID
spase://SMWG/Instrument/THEMIS/A/SST

Description

THEMIS-A: The Solid State Telescope (SST), identical to that on the Wind spacecraft, measures the incoming intensity (flux per solid angle) of superthermal electrons and ions. The spacecraft is fitted with two units (heads), each SST unit has two pairs of opposing ion and electron sensors. Each single sensor covers an angle of 36 degrees. The units are oriented such that one pair is always centered in the rotation plane, the other oriented at a maximum angle of 54 degrees off the plane. Each pair of units are oriented opposite each other allowing both ion and electron sensors to sweep out a maximum of 92% of the sky. The ion and electron sensors primarily measure particles between 30-300 keV and 30-100 keV respectively with a maximum capability of 20-6000 keV and 25-1000 keV. Matched and paired electron broom magnets produce quadrapole fields reducing magnetic contamination. A mechanical attenuator is used to increase the instruments dynamical range avoiding oversaturation near the plasma sheet edge.

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Details

Version:2.0.0

Instrument

ResourceID
spase://SMWG/Instrument/THEMIS/A/SST
ResourceHeader
ResourceName
THEMIS-A: Solid State Telescope (SST): Energy flux spectrogram, electron/ion ground-calculated fluxes (30 keV - 300 keV).
AlternateName
THEMIS-A SST
ReleaseDate
2019-05-05 12:34:56Z
Description

THEMIS-A: The Solid State Telescope (SST), identical to that on the Wind spacecraft, measures the incoming intensity (flux per solid angle) of superthermal electrons and ions. The spacecraft is fitted with two units (heads), each SST unit has two pairs of opposing ion and electron sensors. Each single sensor covers an angle of 36 degrees. The units are oriented such that one pair is always centered in the rotation plane, the other oriented at a maximum angle of 54 degrees off the plane. Each pair of units are oriented opposite each other allowing both ion and electron sensors to sweep out a maximum of 92% of the sky. The ion and electron sensors primarily measure particles between 30-300 keV and 30-100 keV respectively with a maximum capability of 20-6000 keV and 25-1000 keV. Matched and paired electron broom magnets produce quadrapole fields reducing magnetic contamination. A mechanical attenuator is used to increase the instruments dynamical range avoiding oversaturation near the plasma sheet edge.

Acknowledgement
NASA contract NAS5-02099, V. Angelopoulos for use of data from the THEMIS Mission, Davin Larson, and Robert P Lin for their work on the SST.
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/Vassilis.Angelopoulos
2.CoInvestigatorspase://SMWG/Person/Davin.Larson
3.CoInvestigatorspase://SMWG/Person/Robert.P.Lin
InformationURL
Name
THEMIS-A Spacecraft
URL
Description

Spacecraft description from NSSDC database

InformationURL
Name
THEMIS-A Solid-State Telescope
URL
Description

Instrument (SST) description from NSSDC database.

InstrumentType
EnergeticParticleInstrument
InstrumentType
ParticleDetector
InvestigationName
THEMIS Solid State Telescope
ObservatoryID
Caveats
Calibration for the SST has not been completed.