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Article

Design and Optimization of a High-Time-Resolution Magnetic Plasma Analyzer (MPA)

1
Mullard Space Science Laboratory, Department of Space and Climate Physics, University College London, Dorking, Surrey RH5 6NT, UK
2
Southwest Research Institute, San Antonio, TX 78238, USA
3
Space Science Center, University of New Hampshire, Durham, NH 03824, USA
*
Author to whom correspondence should be addressed.
Current address: IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
Appl. Sci. 2020, 10(23), 8483; https://doi.org/10.3390/app10238483
Received: 3 November 2020 / Revised: 24 November 2020 / Accepted: 24 November 2020 / Published: 27 November 2020
(This article belongs to the Special Issue Dynamical Processes in Space Plasmas)
In-situ measurements of space plasma throughout the solar system require high time resolution to understand the plasma’s kinetic fine structure and evolution. In this context, research is conducted to design instruments with the capability to acquire the plasma velocity distribution and its moments with high cadence. We study a new instrument design, using a constant magnetic field generated by two permanent magnets, to analyze solar wind protons and α-particles with high time resolution. We determine the optimal configuration of the instrument in terms of aperture size, sensor position, pixel size and magnetic field strength. We conduct this analysis based on analytical calculations and SIMION simulations of the particle trajectories in our instrument. We evaluate the velocity resolution of the instrument as well as Poisson errors associated with finite counting statistics. Our instrument is able to resolve Maxwellian and κ-distributions for both protons and α-particles. This method retrieves measurements of the moments (density, bulk speed and temperature) with a relative error below 1%. Our instrument design achieves these results with an acquisition time of only 5 ms, significantly faster than state-of-the-art electrostatic analyzers. Although the instrument only acquires one-dimensional cuts of the distribution function in velocity space, the simplicity and reliability of the presented instrument concept are two key advantages of our new design. View Full-Text
Keywords: solar wind; space plasma; in-situ plasma analyzer; high time resolution; small-scale processes; magnetic analyzer solar wind; space plasma; in-situ plasma analyzer; high time resolution; small-scale processes; magnetic analyzer
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MDPI and ACS Style

Criton, B.; Nicolaou, G.; Verscharen, D. Design and Optimization of a High-Time-Resolution Magnetic Plasma Analyzer (MPA). Appl. Sci. 2020, 10, 8483. https://doi.org/10.3390/app10238483

AMA Style

Criton B, Nicolaou G, Verscharen D. Design and Optimization of a High-Time-Resolution Magnetic Plasma Analyzer (MPA). Applied Sciences. 2020; 10(23):8483. https://doi.org/10.3390/app10238483

Chicago/Turabian Style

Criton, Benjamin, Georgios Nicolaou, and Daniel Verscharen. 2020. "Design and Optimization of a High-Time-Resolution Magnetic Plasma Analyzer (MPA)" Applied Sciences 10, no. 23: 8483. https://doi.org/10.3390/app10238483

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