The Solar Neutron Telescope at Gornergrat

Details The Solar Neutron Telescope at Gornergrat The Solar Neutron Telescope at Gornergrat

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....9144m&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #9144

Computer Science

Scientific paper

During eruptive high energy processes at the Sun, neutrons may be produced with energies high enough to reach the Earth in measurable abundances before they decay. Since these neutral particles are not influenced by magnetic fields at the Sun, in the interplanetary space, nor near Earth, the observation of solar neutrons may provide direct information on the processes responsible for particle acceleration during high energy solar eruptions. Initiated by the Solar-Terrestrial Environment Laboratory of the Nagoya University in Japan, a global network of Solar Neutron Telescopes was set up during the 1990's, allowing ground-based solar neutron observation 24 hours a day. The European cornerstone of this network is located at the high altitude research station at Gornergrat, Switzerland (45.98°N, 7.78°E, 3135 m asl). In order to interpret the ground-based recordings, it is necessary to know the relationship between the counting rates of the detectors and the primary particle flux penetrating the Earth's atmosphere. Since this relationship can hardly be determined experimentally or analytically, we developed a Monte Carlo software based on the GEANT3 and GEANT4 codes to simulate the neutron propagation through the Earth's atmosphere and to determine the detector properties. The response of the detector has been simulated for historic solar particle events and compared with measurements.

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