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25 November 1996 Compact particle detector for low-energy particle measurements
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We are developing an Energetic Particle detector capable of making particle measurements in a variety of heliospheric environments, and, in particular in the outer corona of the sun. The current concept is a miniature ion composition/electron telescope that will measure the energy spectra, mass composition and detailed pitch angle distribution of energetic ions and electrons from approximately 10 keV per nucleon to approximately 3 MeV total energy. The telescope is made up of two main components: a time of flight section and a solid state detector array. A collimator defines the acceptance angles for the incoming particles while the time of flight and solid state detector sections measure the velocity and energy of the ions. Electrons are recorded as essentially zero time of flight particles. The miniaturized detector is approximately 100 mm in diameter and measures particles in 6 angular sectors across 140 degree(s); each sector has an opening angle of 12 degree(s) in the orthogonal direction. Extensive use of VLSI techniques and chip on board design allows all electronics to be mounted on circular boards that mate directly to the detector. The entire instrument is less than 0.5 kg in mass and requires less than 0.5 W of regulated power.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ralph L. McNutt Jr., Donald G. Mitchell, Edwin P. Keath, Nicholas P. Paschalidis, Robert E. Gold, and Richard W. McEntire "Compact particle detector for low-energy particle measurements", Proc. SPIE 2804, Missions to the Sun, (25 November 1996);


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