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The Ultra-Low-Energy Isotope Spectrometer (ULEIS) for the Ace Spacecraft

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Book cover The Advanced Composition Explorer Mission

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.

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Authors and Affiliations

  1. Department of Physics, University of Maryland, College Park, MD, 20742, USA

    G. M. Mason, J. E. Mazur, K. A. Daley, J. R. Dwyer, K. F. Heuerman, T. L. James & P. H. Walpole

  2. Institute for Physical Science and Technology, University of Maryland, USA

    G. M. Mason

  3. Applied Physics Laboratory, Johns Hopkins University, Laurel, MD, 20723, USA

    R. E. Gold, S. M. Krimigis, G. B. Andrews, M. J. Kennedy, T. Lefevere, H. Malcolm & B. Tossman

  4. Aerospace Corp., Los Angeles, CA, 90009, USA

    J. E. Mazur

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  1. G. M. Mason
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Editors and Affiliations

  1. University of California, Los Angeles, CA, USA

    C. T. Russell

  2. California Institute of Technology, Pasadena, CA, USA

    R. A. Mewaldt

  3. NASA/Goddard Space Flight Center, Greenbelt, MD, USA

    T. T. Von Rosenvinge

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Mason, G.M. et al. (1998). The Ultra-Low-Energy Isotope Spectrometer (ULEIS) for the Ace Spacecraft. In: Russell, C.T., Mewaldt, R.A., Von Rosenvinge, T.T. (eds) The Advanced Composition Explorer Mission. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4762-0_16

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  • DOI: https://doi.org/10.1007/978-94-011-4762-0_16

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