Preliminary results from the high resolution gamma-ray and hard x-ray spectrometer (HIREGS) '92-'93 long duration balloon flight in Antarctica

Conference · Fri Jan 01 04:00:00 EST 1993 · American Astronomical Society, Bulletin; (United States)

OSTI ID:5646344

Lin, R P; Feffer, P T; Slassi, S; Whiteside, W; Smith, D M; Hurley, K C; Kane, S R; McBride, S; Primbsch, J H; Youssefi, K; Zimmer, G ^[1]; Pelling, R M ^[2]; Cotin, F; Lavigne, J M; Rouaix, G; Vedrenne, G; Pehl, R; Cork, C; Luke, P; Madden, N ; Malone, D

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1. Univ. of California, Berkeley, CA (United States)
2. Univ. of California, San Diego, CA (United States)

HIREGS consists of an array of twelve 6.7 cm diameter x 6.1 cm long liquid nitrogen-cooled segmented germanium detectors enclosed in a bismuth germanate (BGO) active anticoincidence shield. A CsI front collimator defines a 24 degree FWHM field-of-view. The energy resolution is one to several keV FWHM over the instrument energy range of 20 keV to 16 MeV. HIREGS was flown on a 10-day (31 Dec 92--10 Jan 93) circumpolar balloon flight from McMurdo Station, Antarctica. 30.5 hours of observation were obtained between 31 Dec 0400-2130 UT and 1 Jan 0600-1900 UT. Because the Sun was inactive during the flight, only one small flare was detected on 31 Dec 1933 UT. Excellent high resolution [open quotes]quiet[close quotes] Sun hard X-ray and gamma-ray spectra were obtained. These provide stringent upper limits for solar gamma-ray line and hard X-ray and gamma-ray continuum emission, which in turn can constrain the storage and/or continuous acceleration of ions and electrons by the Sun.

• OSTI ID: 5646344
• Report Number(s): CONF-9310189--
• Conference Information: Journal Name: American Astronomical Society, Bulletin; (United States) Journal Volume: 25:3
• Country of Publication: United States
• Language: English

Related Subjects

440104* -- Radiation Instrumentation-- High Energy Physics Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
661320 -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AIRSHIPS
ANTARCTIC REGIONS
ANTARCTICA
ANTICOINCIDENCE
ASTRONOMY
BALLOONS
BGO DETECTORS
CRYOSPHERE
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY RESOLUTION
FERMIONS
GAMMA ASTRONOMY
GAMMA SPECTROMETERS
KEV RANGE
LEPTONS
MEASURING INSTRUMENTS
MEV RANGE
POLAR REGIONS
RADIATION DETECTORS
RADIATIONS
REMOTE SENSING
RESOLUTION
SCINTILLATION COUNTERS
SOLAR ELECTRONS
SOLAR PARTICLES
SOLAR RADIATION
SOLID SCINTILLATION DETECTORS
SPECTROMETERS
STELLAR RADIATION
X-RAY SPECTROMETERS