Abstract
We summarize the recent progress of the Axion Longitudinal Plasma Haloscope (ALPHA) Consortium, a new experimental collaboration to build a plasma haloscope to search for axions and dark photons. The plasma haloscope is a novel method for the detection of the resonant conversion of light dark matter to photons. ALPHA will be sensitive to QCD axions over almost a decade of parameter space, potentially discovering dark matter and resolving the strong CP problem. Unlike traditional cavity haloscopes, which are generally limited in volume by the Compton wavelength of the dark matter, plasma haloscopes use a wire metamaterial to create a tuneable artificial plasma frequency, decoupling the wavelength of light from the Compton wavelength and allowing for much stronger signals. We develop the theoretical foundations of plasma haloscopes and discuss recent experimental progress. Finally, we outline a baseline design for ALPHA and show that a full-scale experiment could discover QCD axions over almost a decade of parameter space.
Original language | English |
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Article number | 055013 |
Journal | Physical Review D |
Volume | 107 |
Issue number | 5 |
DOIs | |
State | Published - Mar 1 2023 |
Funding
This project has received funding from the European Research Council (ERC) under the European Union\u2019s Horizon 2020 research and innovation programme (Grant Agreement No. 101018897 CosmicExplorer) as well as funding for A.\u2009J.\u2009M. and F.\u2009W. under Grant No. 742104. The work was also supported by the Swedish Research Council (V.\u2009R.) under Dnr 2019-02337 \u201CDetecting Axion Dark Matter In The Sky And In The Lab\u201D (AxionDM), with additional support for F.W under Contract No. 335-2014-7424. F.\u2009W. is also supported by the U.S. Department of Energy under Grant Contract No. DE-SC0012567. The work of H.\u2009V.\u2009P. was additionally supported by the G\u00F6ran Gustafsson Foundation for Research in Natural Sciences and Medicine. A.\u2009G.\u2009R. and J.\u2009C. thank support Knut and Alice Wallenberg Foundation: \u201CDiscovering Dark Matter Particles in the Laboratory.\u201D Fermilab is operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. The University of California Berkeley acknowledges support from NSF under Grant No. PHY-1914199. R.\u2009B. and P.\u2009B. were supported by Priority 2030 Federal Academic Leadership Program. S.\u2009M.\u2009A. acknowledges support from NSF under Grant No. DMR-2004386, and the U.S. Department of Energy under Grant No. DESC0017931. This manuscript has been supported by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy as well as by the U.S. Department of Energy through the Oak Ridge National Laboratory LDRD Program.