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Instrument: HI-SCALE : Heliosphere Instrument for Spectra, Composition, and Anisotropy and Low Energies
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Associated Platforms

Spectral/Frequency Information
Wavelength Keyword: Gamma Ray
Number Channels: 2
Spectral/Frequency Coverage/Range: 1 - 15 MeV

Related Data Sets
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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)

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Online Resources

Instrument Logistics
Data Rate: 100 kbps
Instrument Start Date: 1990-10-06
Instrument Owner: Johns Hopkins Applied Physics Lab