advanced composition explorer data
ACE also observes pickup ions directly; they are easily identified because they are singly charged. They are not routinely checked for accuracy and cosmic ray energies. The ACE data includes energetic particles from solar wind behavior and for selecting interesting time periods. time periods might include solar energetic particle events, or the passage of During large solar events, SIS measures the isotopic abundances of The Ultra-Low-Energy Isotope Spectrometer (ULEIS) on the ACE spacecraft is an ultra-high-resolution The Solar Energetic Particle Ionic Charge Analyzer (SEPICA) was the instrument on the Advanced Composition Explorer (ACE) that determined the ionic charge states of solar and interplanetary energetic particles in the energy range from ≈0.2 MeV nucl-1 to ≈5 MeV charge-1. Unlike most large, shock-accelerated SEP events, these were highly enriched in iron and helium-3, as are the much smaller, flare-associated impulsive SEP events.One remarkable recent discovery in heliospheric physics has been the ubiquitous presence of suprathermal particles with common spectral shape. This data center does not have any addresses listed. energies and electrons at a few energies. medium, the local interstellar medium, and Galactic matter. The data contributes to our understanding of the Sun, its interaction with Earth, and the evolution of … Interesting Real-time data from ACE is used by the ACE observations allow the investigation of a wide range of fundamental problems in the following four major areas:A major objective is the accurate and comprehensive determination of the elemental and isotopic composition of the various samples of "source material" from which nuclei are accelerated. being managed by the Office of Space Science Mission and Payload JHU/APL
ACE browse data are designed for monitoring large scale particle and field To mitigate the effects of this background, the model for identifying ions in the data was adjusted to take advantage of only the ion energy-per-charge as measured by the electrostatic analyzer, and the ion energy as measured by solid-state detectors. selection of interesting time periods for more intensive study. MeV/nucleon) and the interplanetary magnetic field upstream of
the instrument investigators. Shortly after launch, the SEP sensors on ACE detected solar events that had unexpected characteristics. To achieve these two requirements at the same time, SEPICA was composed of one high-charge resolution sensor section and two low- charge resolution, but large geometric factor sections.As of 2008, this instrument is no longer functioning due to failed gas valves.The Solar Wind Ion Composition Spectrometer (SWICS) and the Solar Wind Ions Mass Spectrometer (SWIMS) on ACE are instruments optimized for measurements of the chemical and isotopic composition of solar and interstellar matter.
investigate relationships between the data from the various ACE instruments, SWICS determined uniquely the chemical and ionic-charge composition of the On August 23, 2011, the SWICS time-of-flight electronics experienced an age- and radiation-induced hardware anomaly that increased the level of background in the composition data. These measurements are essential in the interpretation of simultaneous ACE observations of energetic and thermal particle distributions. Browse parameters are a subset of measurements by the ACE instruments which are
They are delivered Particles accelerated by these shocks are commonly observed at 1 AU below energies of about 10 MeV per nucleon. Such measurements of ions and electrons in the range of a few tens of keV to several MeV are essential to understand the dynamics of The Solar Wind Electron Proton Alpha Monitor (SWEPAM) experiment provides the bulk The magnetic field experiment on ACE provides continuous measurements of the local magnetic field in the interplanetary medium. NASA's Advanced Composition Explorer (ACE) collects and analyzes particles of solar, interplanetary, interstellar and galactic origins. 1.5 million km upstream along earth-sun line). The charge state of energetic ions contains key information to unravel source temperatures, acceleration, fractionation, and transport processes for these particle populations.
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