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- The Heliosphere Instrument for Spectra, Composition, and Anisotropy at Low
Energies (HI-SCALE) on Ulysses is designed to make measurements of
interplanetary ions and electrons throughout the entire Ulysses mission. The
ions (Ei > 50 keV) and electrons (Ee > 30 keV) are identified uniquely and
detected by five separate solid-state detector telescopes that are oriented to
give nearly complete pitch-angle coverage (i.e., coverage of essentially 4 pi
ster) from the spinning spacecraft. Ion elemental abundances are determined by
a delta E vs E telescope using a thin (5 micron) front solid state detector
element in a three-element telescope. Experiment operation is controlled by a
microprocessor-based data system. Inflight calibration is provided by
radioactive sources mounted on telescope covers which can be closed for
calibration purposes and for radiation protection during the course of the
mission. Ion and electron spectral information is determined using both
broad-energy-range rate channels and a 32 channel pulse-height analyser
(channels spaced logarithmically) for more detailed spectra. The instrument
weighs 5.775 kg and uses 4.0 W of power. Some initial in-ecliptic measurements
are presented which demonstrate the features of the instrument.
(Abstract from: L. Lanzerotti et al., Astron. Astrophys. Suppl. Ser. 92,
349-363, 1992)
For more information, see:
http://sd-www.jhuapl.edu/Ulysses/hiscale.html
and
http://ulysses.jpl.nasa.gov/spacecraft/inst_hiscale.html
Group: Instrument_Details
Entry_ID: HI-SCALE
Group: Instrument_Identification
Instrument_Category: Solar/Space Observing Instruments
Instrument_Class: Particle Detectors
Short_Name: HI-SCALE
Long_Name: Heliosphere Instrument for Spectra, Composition, and Anisotropy and Low Energies
End_Group
Group: Associated_Platforms
Short_Name: ULYSSES
End_Group
Group: Spectral_Frequency_Information
Wavelength_Keyword: Gamma Ray
Number_Channels: 2
Spectral_Frequency_Coverage_Range: 1 - 15 MeV
End_Group
Online_Resource: http://ulysses-ops.jpl.esa.int/ulysses/archive/hiscale.html
Online_Resource: http://sd-www.jhuapl.edu/Ulysses/
Sample_Image: http://ulysses-ops.jpl.esa.int/ulysses/images/hiscale.gif
Group: Instrument_Logistics
Data_Rate: 100 kbps
Instrument_Start_Date: 1990-10-06
Instrument_Owner: Johns Hopkins Applied Physics Lab
End_Group
End_Group
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