The next generation of axion helioscopes: The International Axion Observatory (IAXO)
AuthorVogel, Julia K.
Avignone, Frank T.
Brax, Philippe H.
Çetin, Serkant Ali
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CitationVogel, J. K., Armengaud, E., Avignone, F. T., Betz, M., Brax, P. H., Brun, P. ... Zioutas, K. (2015). The next generation of axion helioscopes: The International Axion Observatory (IAXO). Physics Procedia, 61, 193-200. https://dx.doi.org/10.1016/j.phpro.2014.12.031
The International Axion Observatory (IAXO) is a proposed 4th-generation axion helioscope with the primary physics research goal to search for solar axions via their Primakoff conversion into photons of 1 - 10 keV energies in a strong magnetic field. IAXO will achieve a sensitivity to the axion-photon coupling gaγ down to a few ×10-12 GeV-1 for a wide range of axion masses up to ∼ 0.25 eV. This is an improvement over the currently best (3rd generation) axion helioscope, the CERN Axion Solar Telescope (CAST), of about 5 orders of magnitude in signal strength, corresponding to a factor ∼ 20 in the axion photon coupling. IAXO's sensitivity relies on the construction of a large superconducting 8-coil toroidal magnet of 20 m length optimized for axion research. Each of the eight 60 cm diameter magnet bores is equipped with x-ray optics focusing the signal photons into ∼ 0.2 cm2 spots that are imaged by very low background x-ray detectors. The magnet will be built into a structure with elevation and azimuth drives that will allow solar tracking for 12 hours each day. This contribution is a summary of our papers [1-3] and we refer to these for further details.