PoS - Proceedings of Science
Volume 441 - XVIII International Conference on Topics in Astroparticle and Underground Physics (TAUP2023) - Dark Matter and its Detection
Commissioning and the first observation of ISAI, Investigating Solar Axion by Iron-57, experiment
Y. Onuki
Full text: pdf
Pre-published on: February 15, 2024
Published on: March 22, 2024
ISAI is an experiment of solar axion search dedicated for axion-nucleus interaction.
An event-triggered monolithic Silicon On Insulator (SOI) X-ray pixel detector cooperated with position sensitive anti-coincidence timing counter observes a 14.4 keV gamma-ray as a converted signal of solar axion by Fe-57 isotope.
Because the background from radioactivity in detector defines the axion sensitivity,
we had developed a rigid-flexible circuit board to separate the pixel sensor and the peripheral electrical components having major radioactivities.
Two timing triggers from the pixel detector and the anti-coincidence counter are recorded by a high time resolution DAQ system so that background induced by cosmic-ray or environmental radiation can be rejected in the offline analysis.
We will present the experimental apparatus, the commissioning and the first background observation using the half detector without the anti-coincidence measurement.
DOI: https://doi.org/10.22323/1.441.0086
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