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Cavity Microwave Searches for Cosmological Axions
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.
Date:
January 22, 2007
Creator:
Carosi, G. & van Bibber, K.
System:
The UNT Digital Library
Life of Jesus Cabezuela
This is a paper describing the life of Jesus Cabezuela, by Nora Cabezuela.
Date:
January 22, 1965
Creator:
Cabezuela, Nora
System:
The Portal to Texas History
The Life of Jesus Cabezuela
This is a paper describing the life of Jesus Cabezuela, by Lynda Grace Mendoza.
Date:
January 22, 1965
Creator:
Mendoza, Lynda Grace
System:
The Portal to Texas History
George Francis and Thomas Clement Crosson
This is a paper describing the lives of George Francis Crosson and Thomas Clement Crosson.
Date:
January 22, 1965
Creator:
Hampton, Donna Lee
System:
The Portal to Texas History
Oral History Interview with T. G. Crews, January 22, 1972
Interview with T. G. Crews, a Marine WWII veteran and POW from Stephenville, Texas. Crews, among the first Americans taken prisoner by the Japanese during the war, discusses his time with the North China Marines in Peking, his unit's duties there, his capture, and his experiences during internment at Tianjin, Shanghai, Peking, Busan, and Hakodate.
Date:
January 22, 1972
Creator:
Marcello, Ronald E. & Crews, T. G.
System:
The UNT Digital Library
The Life of Max Cortez Fall Research Paper for American History
Biography of Max Cortez written by his great-granddaughter, Martha Cortez. Max Cortez was born in Aldama, Chihuahua, Mexico in 1867.
Date:
January 22, 1965
Creator:
Cortez, Martha
System:
The Portal to Texas History
Nationwide Toll-Free Federal Government Telephone Numbers
Alphabetical directory listing of federal agencies including their toll-free telephone number and a description of information provided by the agency.
Date:
January 22, 1986
Creator:
Texas. State Purchasing and General Services Commission.
System:
The Portal to Texas History