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The International Axion Observatory (IAXO) is a next-generation axion helioscope for the search of solar axions and Axion-Like Particles (ALPs). It is the follow-up of the CERN Axion Solar Telescope (CAST), which operated from 2003 to 2022. [1]
A helioscope is an instrument used in observing the Sun and sunspots. The helioscope was first used by Benedetto Castelli (1578-1643) and refined by Galileo Galilei (1564–1642). The method involves projecting an image of the sun onto a white sheet of paper suspended in a darkened room with the use of a telescope.
The CAST focuses on the solar axions using a helioscope, which is a 9.2 m superconducting LHC prototype dipole magnet. The superconductive magnet is maintained by constantly keeping it at 1.8 Kelvin using superfluid helium.
A spectrohelioscope is a type of solar telescope designed by George Ellery Hale in 1924 to allow the Sun to be viewed in a selected wavelength of light. The name comes from Latin- and Greek-based words: "Spectro," referring to the optical spectrum, "helio," referring to the Sun, and "scope," as in telescope.
The International Axion Observatory (IAXO) is a proposed fourth generation helioscope. [63] Axions can resonantly convert into photons in the magnetospheres of neutron stars. [64] The emerging photons lie in the GHz frequency range and can be potentially picked up in radio detectors, leading to a sensitive probe of the axion parameter space.
Most heliographs of the 19th and 20th centuries were completely manual. [6] The steps of aligning the heliograph on the target, co-aligning the reflected sunbeam with the heliograph, maintaining the sunbeam alignment as the sun moved, transcribing the message into flashes, modulating the sunbeam into those flashes, detecting the flashes at the receiving end, and transcribing the flashes into ...
The Swedish Solar Telescope at Roque de los Muchachos Observatory, La Palma in the Canary Islands. A solar telescope or a solar observatory is a special-purpose telescope used to observe the Sun.
The solar disk observed in four different wavelengths of ultraviolet radiation by the Atmospheric Imaging Assembly spectroheliograph on board the Solar Dynamics Observatory.