The QUAX proposal: a search of galactic axion with magnetic materials

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Ruoso, G.^1 ; Lombardi, A.^1 ; Ortolan, A.^1 ; Pengo, R.^1 ; Braggio, C.^2 ; Carugno, G.^2 ; Gallo, C.S.^2 ; Speake, C.C.^3

Laboratori Nazionali di Legnaro, Viale dell'Università 2, Legnaro

35020, Italy^1

INFN and Dipartimento di Fisica e Astronomia, Via Marzolo 8, Padova

35131, Italy^2

School of Physics and Astronomy, University of Birmingham, West Midlands

B15 2TT, United Kingdom^3

关键词: Coupling constants;    Larmor resonance frequency;    Polarizing fields;    Pump fields;    RF receivers;    SQUID amplifiers;    Static magnetic fields;    Total magnetization;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/4/042051/pdf
DOI  :  10.1088/1742-6596/718/4/042051

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Aim of the QUAX (QUaerere AXion) proposal is to exploit the interaction of cosmological axions with the spin of electrons in a magnetized sample. Their effect is equivalent to the application of an oscillating rf field with frequency and amplitude which are fixed by axion mass and coupling constant, respectively. The rf receiver module of the QUAX detector consists of magnetized samples with the Larmor resonance frequency tuned to the axion mass by a polarizing static magnetic field. The interaction of electrons with the axion-equivalent rf field produces oscillations in the total magnetization of the samples. To amplify such a tiny field, a pump field at the same frequency is applied in a direction orthogonal to the polarizing field. The induced oscillatory magnetization along the polarizing field is measured by a SQUID amplifier operated at its quantum noise level.