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The Solar Wind Electron (SWE) Instrument for the Interstellar Mapping and Acceleration Probe Mission.

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Title: The Solar Wind Electron (SWE) Instrument for the Interstellar Mapping and Acceleration Probe Mission.
Authors: Skoug, R. M.1 (AUTHOR) rskoug@lanl.gov, Schultz, T. B.1 (AUTHOR), Venhaus, D. M.1 (AUTHOR), Amaya, C. E.2 (AUTHOR), Choedon, T.3 (AUTHOR), Christian, E. R.4 (AUTHOR), Crosier, R. D.2 (AUTHOR), De Los Santos, A.2 (AUTHOR), Fernandes, P. A.1 (AUTHOR), Ford, J. J.2 (AUTHOR), Gkioulidou, M.5 (AUTHOR), Hanley, J. J.2 (AUTHOR), Harvey, D. S.1 (AUTHOR), Hoeper, P. J.2 (AUTHOR), Kubeczka, P. W.2 (AUTHOR), Liu, Y.2 (AUTHOR), Martinez, J. P.1 (AUTHOR), McComas, D. J.6 (AUTHOR), Mohr, H. D.1 (AUTHOR), Nunez, C.2 (AUTHOR)
Source: Space Science Reviews. Jun2026, Vol. 222 Issue 4, p1-28. 28p.
Subjects: Electron detection, Scientific apparatus & instruments, Particle acceleration, Particle physics, Sun, Solar wind, Heliosphere
Abstract: The Solar Wind Electron (SWE) instrument of the Interstellar Mapping and Acceleration Probe (IMAP) mission is designed to measure the in situ solar wind thermal and suprathermal electrons at the spacecraft. SWE contributes to the IMAP science objective to understand particle injection and acceleration processes near the Sun and in the heliosphere and heliosheath, and provides context for the IMAP measurements of energetic neutral atoms from the outer heliosphere. SWE measures the solar wind thermal and suprathermal electron distribution from 1–5000 eV in 24 log-spaced steps with energy resolution Δ E/E of 14%. Electrons are measured at 7 polar angles relative to the spacecraft spin axis using 7 CEM detectors, and in 30 spin angle bins, giving coverage over ∼95% of phase space as the spacecraft spins. A subset of SWE measurements are transmitted in near real time as part of the IMAP I-ALiRT system, providing the first real time identification of counterstreaming solar wind electrons. We describe the SWE instrument design and performance, and SWE operations and data processing. [ABSTRACT FROM AUTHOR]
Copyright of Space Science Reviews is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: The Solar Wind Electron (SWE) Instrument for the Interstellar Mapping and Acceleration Probe Mission.
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  Data: <searchLink fieldCode="JN" term="%22Space+Science+Reviews%22">Space Science Reviews</searchLink>. Jun2026, Vol. 222 Issue 4, p1-28. 28p.
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  Data: The Solar Wind Electron (SWE) instrument of the Interstellar Mapping and Acceleration Probe (IMAP) mission is designed to measure the in situ solar wind thermal and suprathermal electrons at the spacecraft. SWE contributes to the IMAP science objective to understand particle injection and acceleration processes near the Sun and in the heliosphere and heliosheath, and provides context for the IMAP measurements of energetic neutral atoms from the outer heliosphere. SWE measures the solar wind thermal and suprathermal electron distribution from 1–5000 eV in 24 log-spaced steps with energy resolution Δ E/E of 14%. Electrons are measured at 7 polar angles relative to the spacecraft spin axis using 7 CEM detectors, and in 30 spin angle bins, giving coverage over ∼95% of phase space as the spacecraft spins. A subset of SWE measurements are transmitted in near real time as part of the IMAP I-ALiRT system, providing the first real time identification of counterstreaming solar wind electrons. We describe the SWE instrument design and performance, and SWE operations and data processing. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Space Science Reviews is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Electron detection
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      – SubjectFull: Particle acceleration
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