The Ultra-Low-Energy Isotope Spectrometer (ULEIS) for the ACE spacecraft |
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Authors: | Mason GM Gold RE Krimigis SM Mazur JE Andrews GB Daley KA Dwyer JR Heuerman KF James TL Kennedy MJ LeFevere T Malcolm H Tossman B Walpole PH |
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Institution: | (1) Department of Physics, University of Maryland, College Park, MD, 20742, U.S.A.;(2) Applied Physics Laboratory, Johns Hopkins University/, Laurel, MD, 20723, U.S.A. |
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Abstract: | The Ultra Low Energy Isotope Spectrometer (ULEIS) on the ACE spacecraft is an ultra high resolution mass spectrometer designed
to measure particle composition and energy spectra of elements He-Ni with energies from ∼45 keV nucl−1 to a few MeV nucl−1.
ULEIS will investigate particles accelerated in solar energetic particle events, interplanetary shocks, and at the solar wind
termination shock. By determining energy spectra, mass composition, and their temporal variations in conjunction with other
ACE instruments, ULEIS will greatly improve our knowledge of solar abundances, as well as other reservoirs such as the local
interstellar medium. ULEIS is designed to combine the high sensitivity required to measure low particle fluxes, along with
the capability to operate in the largest solar particle or interplanetary shock events. In addition to detailed information
for individual ions, ULEIS features a wide range of count rates for different ions and energies that will allow accurate determination
of particle fluxes and anisotropies over short (∼few minutes) time scales.
This revised version was published online in June 2006 with corrections to the Cover Date. |
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