A Nuclear Detector Gain Stabilizing Technique with Only One Stable Gain Position

Gleske, I. U.; Forrest, D. J.

doi:10.1109/tns.1980.4330845

Cited by 9 publications

(1 citation statement)

References 5 publications

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“…In fact, the instrument response was so stable that SMM/GRS was able to extend its scientiÐc mission beyond solar Ñare studies to include long time base surveys of galactic gammaray line emission from Al26 and positron annihilation (see, e.g., Share et al 1988). The stability of the MCS was achieved by placing the seven detectors in a closed gaincontrol loop that employed gated 60Co calibration sources to force each of the detectors to a common gain (Gleske & Forrest 1980). The outputs of the gain-controlled detectors were summed together every 16.384 s to form two separate 476 channel energy spectraÈa "" singles ÏÏ spectrum and a "" multiples ÏÏ spectrum.…”

Section: The Gamma-ray Spectrometer Aboard Thementioning

confidence: 99%

TheSolar Maximum MissionAtlas of Gamma‐Ray Flares

Vestrand

Murphy

et al. 1999

ASTROPHYS J SUPPL S

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We present a compilation of data for all 258 gamma-ray Ñares detected above 300 keV by the Gamma Ray Spectrometer (GRS) aboard the Solar Maximum Mission satellite. This gamma-ray Ñare sample was collected during the period from 1980 February to 1989 November ; covering the latter half of the 21st solar sunspot cycle and the onset of the 22d solar sunspot cycle. We describe the SMM/GRS instrument, its in-orbit operation, and the principal data reduction methods used to derive the gamma-ray Ñare properties. Utilizing measurements for 185 Ñares that were sufficiently intense to allow the derivation of gamma-ray spectra, we present an atlas of time proÐles and gamma-ray spectra. The Ñare parameters derived from the gamma-ray spectra include bremsstrahlung Ñuence and best-Ðt power-law parameters, narrow nuclear line Ñuence, positron annihilation line Ñuence, neutron capture line Ñuence, and an indication of whether or not emissions greater than 10 MeV were present. Since a uniform methodology was adopted for deriving the parameters, this atlas should be very useful for future statistical and correlative studies of solar Ñares. Subject headings : catalogs È gamma rays : bursts È Sun : Ñares 409 410 VESTRAND ET AL.Vol. 120

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Section: The Gamma-ray Spectrometer Aboard Thementioning

confidence: 99%

TheSolar Maximum MissionAtlas of Gamma‐Ray Flares

Vestrand

Murphy

et al. 1999

ASTROPHYS J SUPPL S

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Hard X-ray and low-energy gamma-ray spectrometers

et al. 1988

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Basic principles of operation and characteristics of scintillation and semi-conductor detectors used for solar hard X-ray and gamma-ray spectrometers are presented. Scintillation materials such as NaI offer high stopping power for incident gamma rays, modest energy resolution, and relatively simple operation. They are, to date, the most often used detector in solar gamma-ray spectroscopy. The scintillator BGO has higher stopping power than NaI, but poorer energy resolution. The primary advantage of semi-conductor materials such as Ge is their high-energy resolution. Monte-Carlo simulations of the response of NaI and Ge detectors to model solar flare inputs show the benefit of high resolution for studying spectral lines. No semi-conductor material besides Ge is currently available with adequate combined size and purity to make general-use hard X-ray and gamma-ray detectors for solar studies.

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