Characterization of optical systems for the ALPS II experiment

Spector, Aaron; Pöld, J.; Bähre, Robin; Lindner, A.; Willke, B.

doi:10.1364/oe.24.029237

“…The collaboration is progressively meeting those technical challenges in a undergoing preparatory phase [442]. Results regarding the specifications of the optical subsystems [443,444] and of the photon detectors [445][446][447] are already available. The full string of magnets is expected to be deployed in 2019 and first data taking will start in 2020.…”

Section: Light-shining-through Wall Experimentsmentioning

confidence: 99%

New experimental approaches in the search for axion-like particles

Irastorza

¹

,

Redondo

²

2018

Progress in Particle and Nuclear Physics

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Axions and other very light axion-like particles appear in many extensions of the Standard Model, and are leading candidates to compose part or all of the missing matter of the Universe. They also appear in models of inflation, dark radiation, or even dark energy, and could solve some long-standing astrophysical anomalies. The physics case of these particles has been considerably developed in recent years, and there are now useful guidelines and powerful motivations to attempt experimental detection. Admittedly, the lack of a positive signal of new physics at the high energy frontier, and in underground detectors searching for weakly interacting massive particles, is also contributing to the increase of interest in axion searches. The experimental landscape is rapidly evolving, with many novel detection concepts and new experimental proposals. An updated account of those initiatives is lacking in the literature. In this review we attempt to provide such an update. We will focus on the new experimental approaches and their complementarity, but will also review the most relevant recent results from the consolidated strategies and the prospects of new generation experiments under consideration in the field. We will also briefly review the latest developments of the theory, cosmology and astrophysics of axions and we will discuss the prospects to probe a large fraction of relevant parameter space in the coming decade.

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“…The collaboration is progressively meeting those technical challenges in a undergoing preparatory phase [442]. Results regarding the specifications of the optical subsystems [443,444] and of the photon detectors [445][446][447] are already available. The full string of magnets is expected to be deployed in 2019 and first data taking will start in 2020.…”

Section: Light-shining-through Wall Experimentsmentioning

confidence: 99%

New experimental approaches in the search for axion-like particles

Irastorza,

Redondo

2018

Preprint

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Axions and other very light axion-like particles appear in many extensions of the Standard Model, and are leading candidates to compose part or all of the missing matter of the Universe. They also appear in models of inflation, dark radiation, or even dark energy, and could solve some long-standing astrophysical anomalies. The physics case of these particles has been considerably developed in recent years, and there are now useful guidelines and powerful motivations to attempt experimental detection. Admittedly, the lack of a positive signal of new physics at the high energy frontier, and in underground detectors searching for weakly interacting massive particles, is also contributing to the increase of interest in axion searches. The experimental landscape is rapidly evolving, with many novel detection concepts and new experimental proposals. An updated account of those initiatives is lacking in the literature. In this review we attempt to provide such an update. We will focus on the new experimental approaches and their complementarity, but will also review the most relevant recent results from the consolidated strategies and the prospects of new generation experiments under consideration in the field. We will also briefly review the latest developments of the theory, cosmology and astrophysics of axions and we will discuss the prospects to probe a large fraction of relevant parameter space in the coming decade.

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“…ALPS II is currently being developed in two stages. The first stage, ALPS IIa, will use two 10 m long resonant cavities without magnets [25]. The second stage, ALPS IIc, will use two 100 m long cavities with 5.3 T superconducting HERA dipole magnets.…”

Section: I2 Alps IImentioning

confidence: 99%

Coherent detection of ultraweak electromagnetic fields

Bush

¹

,

Barke

²

,

Hollis

³

et al. 2019

Self Cite

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We explore the application of heterodyne interferometry for a weak-field coherent detection scheme. The methods detailed here will be used in ALPS II, an experiment designed to search for weakly-interacting, sub-eV particles. For ALPS II to reach its design sensitivity this detection system must be capable of accurately measuring fields with equivalent amplitudes on the order of 10 −5 photons per second or greater. We present initial results of an equivalent dark count rate on the order of 10 −5 photons per second as well as successful generation and detection of a signal with a field strength equivalent to 10 −2 photons per second.

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Characterization of optical systems for the ALPS II experiment

Cited by 8 publications

References 20 publications

New experimental approaches in the search for axion-like particles

New experimental approaches in the search for axion-like particles

New experimental approaches in the search for axion-like particles

Coherent detection of ultraweak electromagnetic fields

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