Straightening of Superconducting HERA Dipoles for the Any-Light-Particle-Search Experiment ALPS II

Albrecht, Clemens; Barbanotti, S.; Hintz, Heiko; Jensch, K.; Klos, Ronald; Maschmann, W.; Sawlanski, Olaf; Stolper, M.; Trines, D.

doi:10.48550/arxiv.2004.13441

Cited by 6 publications

(7 citation statements)

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“…For instance a hypothetical cylindrical detector with L = 1 m and area A = 0.785 m 2 (corresponding to a radius of 0.5 m) can operate at f 4.3 × 10 7 Hz. It is interesting to notice that the idea behind these detectors is similar to the one underpinning various axion experiments, including telescopes such as CAST [269,270] (decommissioned) and IAXO [271] (planned) and 'light-shining-through-a-wall' experiments such as OSQAR [272,273] (decommissioned), ALPS [274,275] (decommissioned) and ALPS II [276,277] (under construction). Using data already collected in axion experiments such as OSQAR and CAST, it is possible to place bounds on the presence of a stochastic background of GWs at the frequency at which these detectors naturally operate [278], which is extremely high: f ∼ 10 15 Hz and f ∼ 10 18 Hz.…”

Section: Conversion In An External Static Magnetic Fieldmentioning

confidence: 99%

Hunt for Light Primordial Black Hole Dark Matter with Ultra-High-Frequency Gravitational Waves

Franciolini¹,

Maharana²,

Muia³

2022

Preprint

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Light primordial black holes may comprise a dominant fraction of the dark matter in our Universe. This paper critically assesses whether planned and future gravitational wave detectors in the ultra-high-frequency band could constrain the fraction of dark matter composed of sub-solar primordial black holes. Adopting the state-of-the-art description of primordial black hole merger rates, we compare various signals with currently operating and planned detectors. As already noted in the literature, our findings confirm that detecting individual primordial black hole mergers with currently existing and operating proposals remains difficult. Current proposals involving gravitational wave to electromagnetic wave conversion in a static magnetic field and microwave cavities feature a technology gap with respect to the loudest gravitational wave signals from primordial black holes of various orders of magnitude. However, we point out that one recent proposal involving resonant LC circuits represents the best option in terms of individual merger detection prospects in the range (1 ÷ 100) MHz. In the same frequency range, we note that alternative setups involving resonant cavities, whose concept is currently under development, might represent a promising technology to detect individual merger events. We also show that a detection of the stochastic gravitational wave background produced by unresolved binaries is possible only if the theoretical sensitivity of the proposed Gaussian beam detector is achieved. Such a detector, whose feasibility is subject to various caveats, may be able to rule-out some scenarios for asteroidal mass primordial black hole dark matter. We conclude that pursuing dedicated studies and developments of gravitational wave detectors in the ultra-high-frequency band remains motivated and may lead to novel probes on the existence of light primordial black holes.

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Section: Conversion In An External Static Magnetic Fieldmentioning

confidence: 99%

Hunt for Light Primordial Black Hole Dark Matter with Ultra-High-Frequency Gravitational Waves

Franciolini¹,

Maharana²,

Muia³

2022

Preprint

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“…These expressions are valid as long as the GWs and the generated EMWs are in phase coherence throughout their propagation in the magnetic field region. Under the assumption that the external B-field is surrounded by a circular beam tube of diameter d, coherent EMW generation is guaranteed if (see Appendix D): [92,93], MADMAX [94,95], BabyI-AXO and IAXO [96], used to estimate the minimum detectable GW amplitude through magnetic conversions of GWs (gravitons) to EMWs (photons) in vacuum: B is the magnetic field magnitude, L is the magnetic field length, d is the diameter of the magnetized tube, and BLA 1/2 , with A = n tubes πd 2 /4, is the figure of merit for GW detection by magnetic conversion into EMWs. Also shown are the effective lower frequency cut-off Eq.…”

Section: Magnetic Gw-emw Conversion In Vacuummentioning

confidence: 99%

“…of axions into photons or vice versa. In Table 3 we show the parameters of the magnetic field region of the next generation of axion experiments: the LSW experiment ALPS IIc [92,93], the haloscope MADMAX [94,95], and the helioscopes BabyIAXO and IAXO [96]. Unfortunately, the prospects to probe the CGMB exploiting these magnetic conversion facilities appear to be rather slim.…”

Section: Magnetic Gw-emw Conversion In Vacuummentioning

confidence: 99%

Gravitational Waves as a Big Bang Thermometer

Ringwald,

Schütte-Engel,

Tamarit

2020

Preprint

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There is a guaranteed background of stochastic gravitational waves produced in the thermal plasma in the early universe. Its energy density per logarithmic frequency interval scales with the maximum temperature T max which the primordial plasma attained at the beginning of the standard hot big bang era. It peaks in the microwave range, at around 80 GHz [106.75/g * s (T max )] 1/3 , where g * s (T max ) is the effective number of entropy degrees of freedom in the primordial plasma at T max . We present a stateof-the-art prediction of this Cosmic Gravitational Microwave Background (CGMB) for general models, and carry out calculations for the case of the Standard Model (SM) as well as for several of its extensions. On the side of minimal extensions we consider the Neutrino Minimal SM (νMSM) and the SM -Axion -Seesaw -Higgs portal inflation model (SMASH), which provide a complete and consistent cosmological history including inflation. As an example of a non-minimal extension of the SM we consider the Minimal Supersymmetric Standard Model (MSSM). Furthermore, we discuss the current upper limits and the prospects to detect the CGMB in laboratory experiments and thus measure the maximum temperature and the effective number of degrees of freedom at the beginning of the hot big bang.

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“…Both techniques are sensitive to changes in the phase ∆θ. Small fluctuations in ∆θ will move energy into other frequency bins leading to signal losses proportional to ∆θ 2 rms . Larger drifts shift energy into the other quadrature and changes by 180 • will invert the signal leading to its cancellation during the integration.…”

Section: Signal Demodulation and Phase Trackingmentioning

confidence: 99%

“…The fundamental parts of ALPS II are shown in Figure 1. The apparatus consists of two strings of twelve straightened 8.8 m long, 5.3 T HERA magnets which are separated by a light-tight wall [2]. Inside the magnet string on the left side of the wall, some of the photons from a high power laser will be converted into axionlike particles.…”

Section: Introductionmentioning

confidence: 99%

The heterodyne sensing system for the ALPS II search for sub-eV weakly interacting particles

Hallal¹,

Messineo²,

Ortiz³

et al. 2020

Preprint

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ALPS II, the Any Light Particle Search, is a second-generation Light Shining through a Wall experiment that hunts for axion-like particles. The experiment is currently transitioning from the design and construction phase to the commissioning phase, with science runs expected to start in 2021. ALPS II plans to use two different sensing schemes to confirm the potential detection of axion-like particles or to verify an upper limit on their coupling strength to two photons of gaγγ ≤ 2 × 10 −11 GeV −1 . This paper discusses a heterodyne sensing scheme (HET) which will be the first scheme deployed to detect the regenerated light. It presents critical details of the optical layout, the length and alignment sensing scheme, design features to minimize spurious signals from stray light, as well as several control and veto channels specific to HET which are needed to commission and operate the instrument and to calibrate the detector sensitivity.

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Straightening of Superconducting HERA Dipoles for the Any-Light-Particle-Search Experiment ALPS II

Cited by 6 publications

References 0 publications

Hunt for Light Primordial Black Hole Dark Matter with Ultra-High-Frequency Gravitational Waves

Hunt for Light Primordial Black Hole Dark Matter with Ultra-High-Frequency Gravitational Waves

Gravitational Waves as a Big Bang Thermometer

The heterodyne sensing system for the ALPS II search for sub-eV weakly interacting particles

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