Concept of multiple-cell cavity for axion dark matter search

Jeong, J. H.; Youn, S. W.; Ahn, Saebyeok; Kim, Jihn E.; Semertzidis, Yannis K.

doi:10.1016/j.physletb.2017.12.066

Cited by 77 publications

(63 citation statements)

References 19 publications

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“…• cavity volume independence. Although cavity volume influences many parameters of the experiment such as resonance frequencies and quality factors, the sensitivity is not directly proportional to this parameter unlike in traditional haloscopes 11,[45][46][47][48] . This removes the major obstacle for higher mass (f a >10GHz) axion searches.…”

Section: Discussionmentioning

confidence: 99%

Axion detection with precision frequency metrology

Goryachev

McAllister

Tobar

2019

Physics of the Dark Universe

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We investigate a new class of galactic halo axion detection techniques based on precision frequency and phase metrology. Employing equations of axion electrodynamics, it is demonstrated how a dual mode cavity exhibits linear mode-mode coupling mediated by the axion upconversion and axion downconversion processes. The approach demonstrates phase sensitivity with an ability to detect axion phase with respect to externally pumped signals. Axion signal to phase spectral density conversion is calculated for open and closed loop detection schemes. The fundamental limits of the proposed approach come from the precision of frequency and environment control electronics, rather than fundamental thermal fluctuations allowing for table-top experiments approaching state-of-the-art cryogenic axion searches in sensitivity. Practical realisations are considered, including a TE-TM mode pair in a cylindrical cavity resonator and two orthogonally polarised modes in a Fabry-Pérot cavity.

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Section: Discussionmentioning

confidence: 99%

Axion detection with precision frequency metrology

Goryachev

McAllister

Tobar

2019

Physics of the Dark Universe

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“…Along with the list of instruments presented in Introduction we also want to mention another possible design, advocated in [78], which is based on quantum coherence of the propagating axions, and which may also benefit from the large coherence length (61) mentioned above. Finally, we want to mention the idea advocated in [79][80][81] that the combination of large number of cavities can drastically enhance the axion signal. The design advocated in [79][80][81] may benefit from large wave length (61) of the gravitationally bound axions.…”

Section: Discussionmentioning

confidence: 99%

Gravitationally trapped axions on the Earth

et al. 2019

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We advocate for the idea that there is a fundamentally new mechanism for axion production on Earth, as recently suggested in [1,2]. We specifically focus on production of axions within Earth, with low velocities such that they will be trapped in the gravitational field. Our computations are based on the so-called Axion Quark Nugget (AQN) dark matter model, which was originally invented to explain the similarity of the dark and visible cosmological matter densities. This occurs in the model irrespective of the axion mass ma or initial misalignment angle θ0. Annihilation of antimatter AQNs with visible matter inevitably produce axions when AQNs hit Earth. The emission rate of axions with velocities below escape velocity is very tiny compared to the overall emission, however these axions will be accumulated over the 4.5 billion year life time of the Earth, which greatly enhances the discovery potential. We perform numerical simulations with a realistically modeled incoming AQN velocity and mass distribution, and explore how AQNs interact as they travel through the interior of the Earth. We use this to estimate the axion flux on the surface of the Earth, the velocity-spectral features of trapped axions, the typical annihilation pattern of AQN, and the density profile of the axion halo around the Earth. Knowledge of these properties is necessary to make predictions for the observability of trapped axions using CAST, ADMX, MADMAX, CULTASK, ORPHEUS, ARIADNE, CASPEr, ABRACADABRA, QUAX, ORGAN, TOORAD, DM Radio.2 In particular, a first-order phase transition is not required as the axion domain wall plays the role of the squeezer. Another problem with [34,35] is that nuggets will likely evaporate on a Hubble time-scale even. For the AQN model this argument is not applicable because the vacuum-ground-state energies inside (color-superconducting phase) and outside (hadronic phase) the nugget are drastically different. Therefore, these two systems can arXiv:1905.00022v2 [astro-ph.CO]

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“…Previous axion-electrodynamics studies [29,42,48] for cavity setups aim to find modes of closed cavities. In the case of a dish antenna and dielectric haloscopes we are Figure 1: Exemplary mesh for a minimal dielectric haloscope, which consists of a circular PEC at z = 0.02 m and a dielectric disk of thickness 0.5 cm, as considered in section 7.…”

Section: Specialized Finite Element Methods (Fem)mentioning

confidence: 99%

A first look on 3D effects in open axion haloscopes

Knirck¹,

Schütte-Engel²,

Millar³

et al. 2019

J. Cosmol. Astropart. Phys.

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We explore finite size 3D effects in open axion haloscopes such as a dish antenna, a dielectric disk and a minimal dielectric haloscope consisting of a mirror and one dielectric disk. Particularly dielectric haloscopes are a promising new method for detecting dark matter axions in the mass range above 40 µeV. By using two specialized independent approaches -based on finite element methods and Fourier optics -we compute the electromagnetic fields in these settings expected in the presence of an axion dark matter field. This allows us to study diffraction and near field effects for realistically sized experimental setups in contrast to earlier idealized 1D studies with infinitely extended mirrors and disks. We also study axion velocity effects and disk tiling. Diffraction effects are found to become less relevant towards larger axion masses and for the larger disk radii for example aimed at in full size dielectric haloscopes such as MAD-MAX. The insights of our study not only provide a foundation for a realistic modelling of open axion dark matter search experiments in general, they are in particular also the first results taking into account 3D effects for dielectric haloscopes.

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Concept of multiple-cell cavity for axion dark matter search

Cited by 77 publications

References 19 publications

Axion detection with precision frequency metrology

Axion detection with precision frequency metrology

Gravitationally trapped axions on the Earth

A first look on 3D effects in open axion haloscopes

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