Speaker
Description
The High Efficiency Neutron Spectrometry Array (HENSA) project develops advanced neutron spectrometers for underground laboratories and cosmic-ray studies. Utilizing a modified Bonner Spheres System (BSS), HENSA achieves ten times higher efficiency than BSS, detecting neutrons from thermal energies to 10 GeV. This enables real-time spectral analysis of solar events such as Ground Level Enhancements and Forbush Decreases.
In 2020, a HENSA detector mapped cosmic-ray neutrons at altitudes up to 3000 m and magnetic rigidities from 5.5 to 8.5 GV. Building on these results, a new spectrometer, HENSA++, was developed with improved energy resolution and began commissioning in 2024, first in Valencia and later at the Observatorio Astrofisico de Javalambre, in Spain.
This talk presents HENSA’s latest results, including the evolution of the neutron spectrum and analyses of selected solar events. Finally, we outline future plans for continuous cosmic-ray neutron monitoring through the second half of Solar Cycle 25.
| Session | 4 - Cosmic Ray Detection Instrumentation |
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