The FIELDS Instrument Suite on MMS: Scientific Objectives, Measurements, and Data Products

Torbert, R. B.; Russell, C. T.; Magnes, W.; Ergun, R. E.; Lindqvist, Per-Arne; LeContel, O.; Vaith, H.; Macri, J.; Myers, Scott A.; Rau, D.; Needell, J.; King, B.; Granoff, M.; Chutter, M.; Dors, I.; Olsson, Göran; Khotyaintsev, Yu. V.; Eriksson, Anders; Kletzing, C. A.; Bounds, S. R.; Anderson, B. J.; Baumjohann, W.; Steller, M.; Bromund, K. R.; Le, G.; Nakamura, R.; Strangeway, R. J.; Leinweber, H. K.; Tucker, S. C.; Westfall, J.; Fischer, D.; Plaschke, Ferdinand; Porter, J.; Lappalainen, K.

doi:10.1007/978-94-024-0861-4_5

Cited by 87 publications

(97 citation statements)

References 17 publications

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“…Eventually such a mission was approved by NASA, the Magnetospheric Multiscale mission (MMS), ultimately scheduled to be launched in 2015. Further comparisons of the MMS and Cluster missions are given by Torbert et al (2015).…”

Section: Scientific Objectives Of the Magnetic Field Investigationmentioning

confidence: 99%

“…This model was developed right as the space age began, when the proper data to test these ideas were being obtained, but initially the community ignored the ideas of Dungey, and more than a decade passed before it was respectable to refer to the mechanism of reconnection as it might apply to the Earth's magnetosphere. The history of the developing understanding of reconnection is discussed in more detail in the accompanying paper on the FIELDS instrument suite by Torbert et al (2015).…”

Section: Introductionmentioning

confidence: 99%

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The Magnetospheric Multiscale Magnetometers

et al. 2014

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The success of the Magnetospheric Multiscale mission depends on the accurate measurement of the magnetic field on all four spacecraft. To ensure this success, two independently designed and built fluxgate magnetometers were developed, avoiding single-point failures. The magnetometers were dubbed the digital fluxgate (DFG), which uses an ASIC implementation and was supplied by the Space Research Institute of the Austrian Academy of Sciences and the analogue magnetometer (AFG) with a more traditional circuit board design supplied by the

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Section: Scientific Objectives Of the Magnetic Field Investigationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Magnetospheric Multiscale Magnetometers

et al. 2014

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“…All three crossings occur within a 30-s (~10 ion cyclotron periods) interval when MMS threads through the magnetotail current sheet at [−17.6, 3 Lindqvist et al, 2014;Torbert et al, 2014), and electron (30 ms per sample) as well as ion (150 ms per sample) data from the Fast Plasma Investigation . All three crossings occur within a 30-s (~10 ion cyclotron periods) interval when MMS threads through the magnetotail current sheet at [−17.6, 3 Lindqvist et al, 2014;Torbert et al, 2014), and electron (30 ms per sample) as well as ion (150 ms per sample) data from the Fast Plasma Investigation .…”

Section: Mms Datamentioning

confidence: 99%

Electron Diffusion Regions in Magnetotail Reconnection Under Varying Guide Fields

Chen

Wang

Hesse

et al. 2019

Geophysical Research Letters

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Kinetic structures of electron diffusion regions (EDRs) under finite guide fields in magnetotail reconnection are reported. The EDRs with guide fields 0.14–0.5 (in unit of the reconnecting component) are detected by the Magnetospheric Multiscale spacecraft. The key new features include the following: (1) cold inflowing electrons accelerated along the guide field and demagnetized at the magnetic field minimum while remaining a coherent population with a low perpendicular temperature, (2) wave fluctuations generating strong perpendicular electron flows followed by alternating parallel flows inside the reconnecting current sheet under an intermediate guide field, and (3) gyrophase bunched electrons with high parallel speeds leaving the X‐line region. The normalized reconnection rates for the three EDRs range from 0.05 to 0.3. The measurements reveal that finite guide fields introduce new mechanisms to break the electron frozen‐in condition.

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“…In MMS, magnetic fields are from Flux Gate Magnetometer , electric fields from double probes in the FIELDS suites Lindqvist et al, 2014;Torbert et al, 2014), and electron VDFs from Fast Plasma Investigation . In MMS, magnetic fields are from Flux Gate Magnetometer , electric fields from double probes in the FIELDS suites Lindqvist et al, 2014;Torbert et al, 2014), and electron VDFs from Fast Plasma Investigation .…”

Section: Comparison Between Theory and Mms Observationmentioning

confidence: 99%

Effect of the Reconnection Electric Field on Electron Distribution Functions in the Diffusion Region of Magnetotail Reconnection

Bessho

Chen

Wang

et al. 2018

Geophysical Research Letters

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Electron distribution functions in the electron diffusion region during symmetric magnetic reconnection are investigated by means of theory and fully kinetic simulations. Crescent‐like striations are formed in distribution functions in the velocity plane perpendicular to the magnetic field. Using an analytical current sheet, we solve the equation of motion for electrons, and derive the shape of a crescent distribution, as a function of the distance from the neutral line, field gradients, and the reconnection electric field. Each crescent is tilted in the velocity plane because of the acceleration by the reconnection electric field, and multiple stripes appear due to multiple meandering bounces. Applying the theory to distribution functions observed in Earth's magnetotail, we deduce the amplitude of the reconnection electric field.

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The FIELDS Instrument Suite on MMS: Scientific Objectives, Measurements, and Data Products

Cited by 87 publications

References 17 publications

The Magnetospheric Multiscale Magnetometers

The Magnetospheric Multiscale Magnetometers

Electron Diffusion Regions in Magnetotail Reconnection Under Varying Guide Fields

Effect of the Reconnection Electric Field on Electron Distribution Functions in the Diffusion Region of Magnetotail Reconnection

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