Cavity Microwave Searches for Cosmological Axions

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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 'photon-as-particle' (i.e. ... continued below

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PDF-file: 26 pages; size: 1.2 Mbytes

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Carosi, G. & van Bibber, K. January 22, 2007.

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Description

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 'photon-as-particle' (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 section will conclude with a discussion of future plans and challenges for the microwave cavity experiment.

Physical Description

PDF-file: 26 pages; size: 1.2 Mbytes

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  • Lecture Notes in Physics: Axions; Theory, Cosmology and Experimental Searches, Cavity Microwave Searches for Cosmological Axions, Springer-Verlag, Berlin, 2008, pp. 135-156

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  • Report No.: UCRL-BOOK-227455
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 940485
  • Archival Resource Key: ark:/67531/metadc902002

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 22, 2007

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 6, 2016, 12:20 p.m.

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Carosi, G. & van Bibber, K. Cavity Microwave Searches for Cosmological Axions, book, January 22, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc902002/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.