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Axions pp 135-156 | Cite as

Microwave Cavity Searches

  • Gianpaolo Carosi
  • Karl van Bibber
Chapter
Part of the Lecture Notes in Physics book series (LNP, volume 741)

Abstract

This chapter will cover the search for dark matter axions based on microwave cavity experiments proposed by Pierre Sikivie. We will start with a brief overview of halo dark matter and the axion as a candidate. The principle of resonant conversion of axions in an external magnetic field will be described as well as practical considerations in optimizing the experiment as a signal-to-noise problem. A major focus of this chapter will be the two complementary strategies for ultra-low noise detection of the microwave photons – the “photon-as-wave” approach (i.e., conventional heterojunction amplifiers and soon to be quantum-limited SQUID devices), and the “photon-as-particle” approach (i.e.,Rydberg-atom single-quantum detection). Experimental results will be presented; these experiments have already reached well into the range of sensitivity to exclude plausible axion models, for limited ranges of mass. The chapter will conclude with a discussion of future plans and challenges for the microwave cavity experiment.

Keywords

Dark Matter Transverse Magnetic Wilkinson Microwave Anisotropy Probe Dark Matter Candidate Noise Temperature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Gianpaolo Carosi
    • 1
  • Karl van Bibber
    • 1
  1. 1.Lawrence Livermore National LaboratoryLivermore94550, USA

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