Magnetospheric Multiscale Science Mission Profile and Operations

Fuselier, S. A.; Lewis, W. S.; Schiff, C.; Ergun, R. E.; Burch, J. L.; Petrinec, S. M.; Trattner, K. J.

doi:10.1007/978-94-024-0861-4_4

Cited by 80 publications

(122 citation statements)

References 26 publications

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“…1. The MMS observatories were in a tetrahedron configuration (quality factor21 ∼0.9) separated by ∼40 km, a distance which corresponded to a local thermal ion gyroradius ( ρ i =35 km).…”

Section: Resultsmentioning

confidence: 99%

Wave-particle energy exchange directly observed in a kinetic Alfvén-branch wave

et al. 2017

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Alfvén waves are fundamental plasma wave modes that permeate the universe. At small kinetic scales, they provide a critical mechanism for the transfer of energy between electromagnetic fields and charged particles. These waves are important not only in planetary magnetospheres, heliospheres and astrophysical systems but also in laboratory plasma experiments and fusion reactors. Through measurement of charged particles and electromagnetic fields with NASA's Magnetospheric Multiscale (MMS) mission, we utilize Earth's magnetosphere as a plasma physics laboratory. Here we confirm the conservative energy exchange between the electromagnetic field fluctuations and the charged particles that comprise an undamped kinetic Alfvén wave. Electrons confined between adjacent wave peaks may have contributed to saturation of damping effects via nonlinear particle trapping. The investigation of these detailed wave dynamics has been unexplored territory in experimental plasma physics and is only recently enabled by high-resolution MMS observations.

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Section: Resultsmentioning

confidence: 99%

Wave-particle energy exchange directly observed in a kinetic Alfvén-branch wave

et al. 2017

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“…However, the other 30% inconsistent events may be caused by the limited time resolution of the data. Further analysis can be carried out with higher‐resolution plasma data from the Magnetospheric Multiscale (MMS) mission [ Fuselier et al ., ] in the future.…”

Section: Summary and Discussionmentioning

confidence: 99%

Propagation characteristics of young hot flow anomalies near the bow shock: Cluster observations

et al. 2015

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Based on Cluster observations, the propagation velocities and normal directions of hot flow anomaly (HFA) boundaries upstream the Earth's bow shock are calculated. Twenty‐one young HFAs, which have clear leading and trailing boundaries, were selected, and multispacecraft timing method considering errors was employed for the investigation. According to the difference in the propagation velocity of the leading and trailing edges, we categorized these events into three groups, namely, contracting, expanding, and stable events. The contraction speed is a few tens of kilometers per second for the contracting HFAs, and the expansion speed is tens to more than hundred kilometers per second for expanding events. For the stable events, the leading and trailing edges propagate at almost the same speed within the error range. We have further investigated what causes them to contract, expand, or stay stable by carefully calculating the thermal pressure of the young HFAs which have two distinct ion populations (solar wind beam and reflected flow). It is found that the extreme value of the sum of the magnetic and thermal pressure inside the HFAs compared with that of the nearest point outside of the leading edges is higher for expanding events and lower for contracting events, and there is no significant difference for the stable events, and the total pressure (sum of thermal, magnetic, and dynamic pressure) variation has a significant effect on the evolution for most (70%) of the HFAs, which implies that the pressure plays an important role in the evolution of young HFAs.

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“…We make no attempt to review this topic in any detail. In this volume , Fuselier et al (2014), and Hesse et al (2014) give comprehensive reviews of reconnection phenomena and discuss the scientific objectives of the MMS mission. In addition to their reviews we have found papers by Shay et al (2001), Kuznetsowa et al (2001), Phan et al (2003), and Drake et al (2009) useful in formulating instrument science goals and requirements.…”

Section: Introductionmentioning

confidence: 99%

Hot Plasma Composition Analyzer for the Magnetospheric Multiscale Mission

et al. 2014

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This paper describes the science motivation, measurement objectives, performance requirements, detailed design, approach and implementation, and calibration of the four Hot Plasma Composition Analyzers (HPCA) for the Magnetospheric Multiscale mission. The HPCA is based entirely on electrostatic optics combining an electrostatic energy analyzer with a carbon-foil based time-of-flight analyzer. In order to fulfill mission requirements, the HPCA incorporates three unique technologies that give it very wide dynamic range capabilities essential to measuring minor ion species in the presence of extremely high proton fluxes found in the region of magnetopause reconnection. Dynamic range is controlled primarily by a novel radio frequency system analogous to an RF mass spectrometer. The RF, in combination with capabilities for high TOF event processing rates and high current micro-channel plates, ensures the dynamic range and sensitivity needed for accurate measurements of ion fluxes between ∼1 eV and 40 keV that are expected in the region of In order to calibrate the four HPCA instruments we have developed a unique ion calibration system. The system delivers a multi-species beam resolved to M/ M ∼ 100 and current densities between 0.05 and 200 pA/cm 2 with a stability of ±5 %. The entire system is controlled by a dedicated computer synchronized with the HPCA ground support equipment. This approach results not only in accurate calibration but also in a comprehensive set of coordinated instrument and auxiliary data that makes analysis straightforward and ensures archival of all relevant data.

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Magnetospheric Multiscale Science Mission Profile and Operations

Cited by 80 publications

References 26 publications

Wave-particle energy exchange directly observed in a kinetic Alfvén-branch wave

Wave-particle energy exchange directly observed in a kinetic Alfvén-branch wave

Propagation characteristics of young hot flow anomalies near the bow shock: Cluster observations

Hot Plasma Composition Analyzer for the Magnetospheric Multiscale Mission

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