SONTRAC: A solar neutron track chamber detector

Details SONTRAC: A solar neutron track chamber detector SONTRAC: A solar neutron track chamber detector

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....5..498f&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 5 p 498-501 (SEE N85-34991 23-93)

Physics

Optics

Apertures, Coding, High Energy Interactions, Kinetic Energy, Masking, Neutron Counters, Neutron Spectra, Particle Energy, Particle Tracks, Satellite-Borne Instruments, Scattering, Solar Flares, Solar Neutrons, Calorimeters, Fiber Optics, Gamma Ray Astronomy, Ionization Chambers, Optical Fibers, Scintillation Counters, Solar Maximum Mission

Scientific paper

The recent detection on the solar maximum mission (SMM) satellite of high energy neutrons emitted during large solar flares has provided renewed incentive to design a neutron detector which has the sensitivity, energy resolution, and time resolution to measure the neutron time and energy spectra with sufficient precision to improve our understanding of the basic flare processes. Over the past two decades a variety of neutron detectors has been flown to measure the atmospheric neutron intensity above 10 MeV and to search for solar neutrons. The SONTRAC (Solar Neutron Track Chamber) detector, a new type of neutron detector which utilizes n-p scattering and has a sensitivity 1-3 orders of magnitude greater than previous instruments in the 20-200 MeV range is described. The energy resolution is 1% for neutron kinetic energy, Tn 50 MeV. When used with a coded aperture mask at 50 m (as would be possible on the space station) an angular resolution of approx. 4 arc sec could be achieved, thereby locating the sites of high energy nuclear interactions with an angular precision comparable to the existing x-ray experiments on SMM. The scintillation chamber is investigated as a track chamber for high energy physics, either by using arrays of scintillating optical fibers or by optical imaging of particle trajectories in a block of scintillator.

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