Coupled Dark State Magnetometer for the China Seismo-Electromagnetic Satellite

Andreas Pollinger, Roland Lammegger, Werner Magnes, Christian Hagen, Michaela Ellmeier, Irmgard Jernej, Mario Leichtfried, Christoph Kürbisch, Rupert Maierhofer, Robert Wallner, Gerhard Fremuth, Christoph Amtmann, Alexander Betzler, Magda Delva, Gustav Prattes, Wolfgang Baumjohann

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

Abstract The Coupled Dark State Magnetometer (CDSM) is an optically pumped scalar magnetometer, which is based on two-photon spectroscopy of free alkali atoms. This paper introduces the measurement principle, instrument design, required resources and key performance characteristics of the flight model for the China Seismo-Electromagnetic Satellite, which is the first demonstration of the CDSM measurement principle in space. The CDSM uses several Coherent Population Trapping (CPT) resonances in parallel in order to reduce systematic errors, e.g. the sensor temperature dependence. Overall five control loops were identified to enable a reliable operation. As known so far CPT is the only effect in optical magnetometry which inherently enables omni-directional, dead zone free measurements. This leads to a simple all-optical sensor design without double cell units, excitation coils or electromechanical parts. The instrument is characterized by an accuracy of 0.19 nT (σ), a detection noise of 50 pTrms at 1 s integration time, a mass of 1672 g and an in Earth orbit measured power consumption of 3394 mW.
Spracheenglisch
Seitenumfang19
FachzeitschriftMeasurement science & technology
DOIs
StatusVeröffentlicht - 6 Aug 2018

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Magnetometers
magnetometers
China
Satellites
electromagnetism
Trapping
Dead Zone
Optical Sensor
Systematic Error
trapping
Coil
Time Integration
Temperature Dependence
Power Consumption
Earth orbits
Spectroscopy
Systematic errors
Optical sensors
Photon
Temperature sensors

Fields of Expertise

  • Advanced Materials Science

Dies zitieren

Coupled Dark State Magnetometer for the China Seismo-Electromagnetic Satellite. / Pollinger, Andreas; Lammegger, Roland; Magnes, Werner; Hagen, Christian; Ellmeier, Michaela; Jernej, Irmgard; Leichtfried, Mario; Kürbisch, Christoph; Maierhofer, Rupert; Wallner, Robert; Fremuth, Gerhard; Amtmann, Christoph; Betzler, Alexander; Delva, Magda; Prattes, Gustav; Baumjohann, Wolfgang.

in: Measurement science & technology, 06.08.2018.

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Pollinger, Andreas ; Lammegger, Roland ; Magnes, Werner ; Hagen, Christian ; Ellmeier, Michaela ; Jernej, Irmgard ; Leichtfried, Mario ; Kürbisch, Christoph ; Maierhofer, Rupert ; Wallner, Robert ; Fremuth, Gerhard ; Amtmann, Christoph ; Betzler, Alexander ; Delva, Magda ; Prattes, Gustav ; Baumjohann, Wolfgang. / Coupled Dark State Magnetometer for the China Seismo-Electromagnetic Satellite. in: Measurement science & technology. 2018.
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abstract = "The Coupled Dark State Magnetometer (CDSM) is an optically pumped scalar magnetometer, which is based on two-photon spectroscopy of free alkali atoms. This paper introduces the measurement principle, instrument design, required resources and key performance characteristics of the flight model for the China Seismo-Electromagnetic Satellite, which is the first demonstration of the CDSM measurement principle in space. The CDSM uses several Coherent Population Trapping (CPT) resonances in parallel in order to reduce systematic errors, e.g. the sensor temperature dependence. Overall five control loops were identified to enable a reliable operation. As known so far CPT is the only effect in optical magnetometry which inherently enables omni-directional, dead zone free measurements. This leads to a simple all-optical sensor design without double cell units, excitation coils or electromechanical parts. The instrument is characterized by an accuracy of 0.19 nT (σ), a detection noise of 50 pTrms at 1 s integration time, a mass of 1672 g and an in Earth orbit measured power consumption of 3394 mW.",
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AU - Pollinger, Andreas

AU - Lammegger, Roland

AU - Magnes, Werner

AU - Hagen, Christian

AU - Ellmeier, Michaela

AU - Jernej, Irmgard

AU - Leichtfried, Mario

AU - Kürbisch, Christoph

AU - Maierhofer, Rupert

AU - Wallner, Robert

AU - Fremuth, Gerhard

AU - Amtmann, Christoph

AU - Betzler, Alexander

AU - Delva, Magda

AU - Prattes, Gustav

AU - Baumjohann, Wolfgang

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AB - The Coupled Dark State Magnetometer (CDSM) is an optically pumped scalar magnetometer, which is based on two-photon spectroscopy of free alkali atoms. This paper introduces the measurement principle, instrument design, required resources and key performance characteristics of the flight model for the China Seismo-Electromagnetic Satellite, which is the first demonstration of the CDSM measurement principle in space. The CDSM uses several Coherent Population Trapping (CPT) resonances in parallel in order to reduce systematic errors, e.g. the sensor temperature dependence. Overall five control loops were identified to enable a reliable operation. As known so far CPT is the only effect in optical magnetometry which inherently enables omni-directional, dead zone free measurements. This leads to a simple all-optical sensor design without double cell units, excitation coils or electromechanical parts. The instrument is characterized by an accuracy of 0.19 nT (σ), a detection noise of 50 pTrms at 1 s integration time, a mass of 1672 g and an in Earth orbit measured power consumption of 3394 mW.

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