Journal article
The Analyzer for Cusp Ions (ACI) on the TRACERS Mission
Space science reviews, Vol.221(2), 30
03/2025
DOI: 10.1007/s11214-025-01154-w
PMCID: PMC11906535
PMID: 40092471
Abstract
The Analyzers for Cusp Ions (ACIs) on the TRACERS mission measure ion velocity distribution functions in the magnetospheric cusp from two closely spaced spacecraft in low Earth orbit. The precipitating and upflowing ion measurements contribute to the overarching goal of the TRACERS mission and are key to all three science objectives of the mission. ACI is a toroidal top-hat electrostatic analyzer on a spinning platform that provides full angular coverage with instantaneous 22.5° × ∼6° angular resolution for a single energy step. ACI has an ion energy range from ∼8 eV/e to 20,000 eV/e covered in 47 logarithmic-spaced energy steps with fractional energy resolution of ∼10%. It provides reasonably high cadence (312 ms) measurements of the ion energy-pitch angle distribution with good sensitivity and energy resolution, enabling detection of cusp boundaries and characterization of cusp ion steps.
Details
- Title: Subtitle
- The Analyzer for Cusp Ions (ACI) on the TRACERS Mission
- Creators
- Stephen A Fuselier - Southwest Research InstituteMatthew A Freeman - Southwest Research InstituteCraig A Kletzing - University of IowaSean R Christopherson - Southwest Research InstituteMichael J Covello - Southwest Research InstituteDaniel De Luna - Southwest Research InstituteRaymond L Doty - Southwest Research InstituteColin G Elder - Southwest Research InstituteJudith D Furman - Southwest Research InstituteJonathan Gasser - Southwest Research InstituteDon E George - Southwest Research InstituteRoman G Gomez - Southwest Research InstituteGuy A Grubbs II - Southwest Research InstituteKristie Llera - Southwest Research InstituteDavid M Miles - University of IowaJoey Mukherjee - Southwest Research InstituteKristian B Persson - Southwest Research InstituteSteven M Petrinec - Lockheed MartinDinesh K V Radhakrishnan - Southwest Research InstituteChristopher L Ramirez - Southwest Research InstituteAshley S Reisig - Southwest Research InstituteCharline Rodriguez - Southwest Research InstituteCourtney A Rouse - Southwest Research InstituteDavid A Ruggles - Southwest Research InstituteShawn D Schwarz - Southwest Research InstituteJonathan R Sekula - Southwest Research InstituteLinda J Shipp - Southwest Research InstituteJustyna M Sokół - Southwest Research InstituteKylie M Sullivan - Southwest Research InstituteKarlheinz J Trattner - University of Colorado BoulderSarah K Vines - Southwest Research Institute
- Resource Type
- Journal article
- Publication Details
- Space science reviews, Vol.221(2), 30
- DOI
- 10.1007/s11214-025-01154-w
- PMID
- 40092471
- PMCID
- PMC11906535
- NLM abbreviation
- Space Sci Rev
- ISSN
- 0038-6308
- eISSN
- 1572-9672
- Publisher
- Springer Nature; DORDRECHT
- Grant note
- C0000008 / CLC NIH HHS
- Language
- English
- Date published
- 03/2025
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984801891202771
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