Decommissioned LHC model magnet as an axion telescope

K. Zioutas, C. E. Aalseth, D. Abriola, F. T.Avignone Iii, R. L. Brodzinski, J. I. Collar, R. Creswick, D. E.Di Gregorio, H. Farach, A. O. Gattone, C. K. Guérard, F. Hasenbalg, M. Hasinoff, H. Huck, A. Liolios, H. S. Miley, A. Morales, J. Morales, D. Nikas, S. NussinovA. Ortiz, E. Savvidis, S. Scopel, P. Sievers, J. A. Villar, L. Walckiers

Research output: Contribution to journalArticlepeer-review


The 8.4 T, 10 m long transverse magnetic field of a twin aperture LHC bending magnet can be utilized as a macroscopic coherent solar axion-to-photon converter. Numerical calculations show that the integrated time of alignment with the Sun would be 33 days/yr with the magnet on a tracking table capable of ±5° in the vertical direction and ±40° in the horizontal direction. The existing lower bound on the axion-to-photon coupling constant can be improved by a factor between 30 and 100 in 3 yr, i.e., gaγγ≲9×10-11 GeV-1 for axion masses ≲1 eV. This value falls within the existing open axion mass window. The same set-up can simultaneously search for low- and high-energy celestial axions, or axion-like particles, scanning the sky as the Earth rotates and orbits the Sun.

Original languageEnglish
Pages (from-to)480-487
Number of pages8
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number3
StatePublished - 11 Apr 1999


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