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Magnets are Weber Bar Gravitational Wave Detectors.

Valerie Domcke1, Sebastian A R Ellis2, Nicholas L Rodd3,4

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This summary is machine-generated.

Gravitational waves (GWs) can be detected using powerful magnets. This novel magnetic Weber bar design offers exceptional sensitivity for discovering GWs and searching for axion dark matter.

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Area of Science:

  • Astrophysics
  • Experimental Physics

Background:

  • Gravitational waves (GWs) interact with magnetic fields.
  • Existing detectors have limitations in sensitivity and frequency range.

Purpose of the Study:

  • To quantify the sensitivity of magnets to GWs.
  • To propose a magnetic Weber bar as an optimal GW detector design.
  • To explore the application of this concept in dark matter searches.

Main Methods:

  • Theoretical analysis of GW-magnet interaction.
  • Modeling of a magnetic Weber bar detector.
  • Simulation of sensitivity using parameters from existing experiments like ADMX-EFR.

Main Results:

  • Magnets exhibit exceptional GW sensitivity within a specific frequency range.
  • A magnetic readout strategy is identified as an optimal Weber bar design.
  • The MRI magnet for ADMX-EFR can achieve a broadband GW strain sensitivity of ~10^{-20}/sqrt[Hz] from kHz to MHz, with peak sensitivity ~10^{-22}/sqrt[Hz}.

Conclusions:

  • Magnets provide a viable and sensitive method for GW detection.
  • This approach can be particularly effective when combined with powerful magnets used in axion dark matter searches.
  • The proposed magnetic Weber bar design offers a promising new avenue for GW astronomy and fundamental physics research.