Biaxially Textured 
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 Microwave Cavity in a High Magnetic Field for a Dark-Matter Axion Search

Ahn, Danho; Kwon, Ohjoon; Chung, Woohyun; Jang, Won-Jun; Lee, Doyu; Lee, Jhinhwan; Youn, Sung Woo; Byun, HeeSu; Youm, Dojun; Semertzidis, Yannis K.

doi:10.1103/physrevapplied.17.l061005

Cited by 13 publications

(4 citation statements)

References 33 publications

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“…Ahn et al observed similar field behaviors at small magnetic fields when characterizing their YBCO tape coated axion cavity. They attributed the magnetization to the Ni-9W metallic layer [22]. We have demonstrated that the peak at small magnetic fields is governed by the field response of the buffer layers [23], which after delamination remain in patches on the superconducting surface as can be seen in figure 7(a).…”

Section: Radio-frequency Measurementsmentioning

confidence: 99%

Field quality and surface resistance studies of a superconducting REBa₂Cu₃O_7−x—Cu hybrid coating for the FCC beam screen

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Calatroni

et al. 2023

Supercond. Sci. Technol.

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To ensure beam stability in CERN’s future circular hadron collider, RE(=Y, Gd, Eu)Ba2Cu3O7−x high-temperature superconductor was proposed as a low-surface impedance coating for its beam screen. Unfortunately, persistent currents in the superconductor will degrade the magnetic ﬁeld homogeneity inside the beam chamber, endangering the stability of the beam trajectory. To counteract this eﬀect, we have explored the possibility to use a highly conductive hybrid coating made of Cu and REBa2Cu3O7−x. This decreases the surface impedance when compared to that of pure copper, while maintaining high magnetic ﬁeld quality inside the beam screen chamber. This work formulates guidelines for hybrid coating geometries to comply with the ﬁeld quality criterion of a circular accelerator during operation with dipole magnets by means of ﬁnite elements numerical analysis. We produced hybrid coating samples with compliant geometries via photolithography. Scanning Hall microscopy and radiofrequency characterization have given the ﬁrst experimental conﬁrmation that these hybrid coatings oﬀer high ﬁeld quality and present a surface resistance lower than that of copper for the beam screen of the future circular hadron collider. The excellent agreement shown between experimental results and simulations validate that the numerical analysis performed throughout this work can be used as a prediction tool for future proposed geometries.

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Section: Radio-frequency Measurementsmentioning

confidence: 99%

Field quality and surface resistance studies of a superconducting REBa₂Cu₃O_7−x—Cu hybrid coating for the FCC beam screen

Telles

Романов

Calatroni

et al. 2023

Supercond. Sci. Technol.

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“…In 2019, CAPP has solved the problem by attaching the well-grown 2-dimensional REBCO film directly to the inner wall of a 3-dimensional cavity. CAPP developed a prototype cavity in which the TM 010 mode resonated at 6.9 GHz using HTS tape and achieved a Q-factor six times higher than that of copper resonators at 4 K and 8 T magnetic field [283], as shown in Fig 22 . A second-generation cavity with a larger volume and a sapphire tuning system was then created to achieve a Q-factor of half a million and used in the physics run of axion search in 2021. Finally, CAPP's third-generation superconducting cavity development has achieved a Q-factor of order of 10 7 , which is 10 times the axion Q-factor, even in an 8 T magnetic field.…”

Section: Axion Searching Experiments At Ibs-cappmentioning

confidence: 99%

“…Figure 22: (a) Photo of CAPP's prototype superconducting cavity (b) Q-factor measurements of CAPP's 1st generation prototype superconducting cavity. These are imported from figure 1, 4 of[283] …”

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confidence: 99%

Feebly-interacting particles: FIPs 2020 workshop report

et al. 2021

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With the establishment and maturation of the experimental programs searching for new physics with sizeable couplings at the LHC, there is an increasing interest in the broader particle and astrophysics community for exploring the physics of light and feebly-interacting particles as a paradigm complementary to a New Physics sector at the TeV scale and beyond. FIPs 2020 has been the first workshop fully dedicated to the physics of feebly-interacting particles and was held virtually from 31 August to 4 September 2020. The workshop has gathered together experts from collider, beam dump, fixed target experiments, as well as from astrophysics, axions/ALPs searches, current/future neutrino experiments, and dark matter direct detection communities to discuss progress in experimental searches and underlying theory models for FIPs physics, and to enhance the cross-fertilisation across different fields. FIPs 2020 has been complemented by the topical workshop “Physics Beyond Colliders meets theory”, held at CERN from 7 June to 9 June 2020. This document presents the summary of the talks presented at the workshops and the outcome of the subsequent discussions held immediately after. It aims to provide a clear picture of this blooming field and proposes a few recommendations for the next round of experimental results.

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“…A frequency range of 30 GHz (corresponding to axion masses 330-460 µeV) could be covered with ∼ 3000 exposures. Assuming that a NEP of 3 × 10 −20 W/ √ Hz can be achieved with future technology and one could in principle gain an order of magnitude on the Q 0 using superconducting cavities [107], sensitivity down to g aγ ≈ 2 × 10 −13 GeV −1 can be achieved proofs JCAP_035P_0622 in a single exposure of ∼ 1 day. The mass range 330-460 µeV could therefore be probed on a total measuring time of ∼ 8 years (which can be split among several instruments with haloscopes build for different frequency ranges), shown by the region bounded by a thick black solid line in figure 12.…”

Section: Projected Axion Sensitivitymentioning

confidence: 99%

The Canfranc Axion Detection Experiment (CADEx): search for axions at 90 GHz with Kinetic Inductance Detectors

Aja

Cuendis

Arregui

et al. 2022

J. Cosmol. Astropart. Phys.

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We propose a novel experiment, the Canfranc Axion Detection Experiment (CADEx), to probe dark matter axions with masses in the range 330–460 μeV, within the W-band (80–110 GHz), an unexplored parameter space in the well-motivated dark matter window of Quantum ChromoDynamics (QCD) axions. The experimental design consists of a microwave resonant cavity haloscope in a high static magnetic field coupled to a highly sensitive detecting system based on Kinetic Inductance Detectors via optimized quasi-optics (horns and mirrors). The experiment is in preparation and will be installed in the dilution refrigerator of the Canfranc Underground Laboratory. Sensitivity forecasts for axion detection with CADEx, together with the potential of the experiment to search for dark photons, are presented.

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Biaxially Textured YBa2Cu3O7−x Microwave Cavity in a High Magnetic Field for a Dark-Matter Axion Search

Cited by 13 publications

References 33 publications

Field quality and surface resistance studies of a superconducting REBa₂Cu₃O_7−x—Cu hybrid coating for the FCC beam screen

Field quality and surface resistance studies of a superconducting REBa₂Cu₃O_7−x—Cu hybrid coating for the FCC beam screen

Feebly-interacting particles: FIPs 2020 workshop report

The Canfranc Axion Detection Experiment (CADEx): search for axions at 90 GHz with Kinetic Inductance Detectors

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Biaxially Textured YBa2Cu3O7−x Microwave Cavity in a High Magnetic Field for a Dark-Matter Axion Search

Cited by 13 publications

References 33 publications

Field quality and surface resistance studies of a superconducting REBa2Cu3O7−x —Cu hybrid coating for the FCC beam screen

Field quality and surface resistance studies of a superconducting REBa2Cu3O7−x —Cu hybrid coating for the FCC beam screen

Feebly-interacting particles: FIPs 2020 workshop report

The Canfranc Axion Detection Experiment (CADEx): search for axions at 90 GHz with Kinetic Inductance Detectors

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Product

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Field quality and surface resistance studies of a superconducting REBa₂Cu₃O_7−x—Cu hybrid coating for the FCC beam screen

Field quality and surface resistance studies of a superconducting REBa₂Cu₃O_7−x—Cu hybrid coating for the FCC beam screen