Now showing items 1-11 of 11

    • Anisotropic Spin-Exchange 

      Walker, Thad G.; Kadlecek, Stephen; Nelson, Ian (2009-11-25)
      Using measured spin-transfer rates from alkali atoms to 3He, combined with spin-relaxation rates of the alkali atoms due to 3He and 4He, it should be possible to di?erentiate between isotropic and anisotropic spin-exchange. ...
    • Codes to accompany "Optically Pumped Atoms" 

      Walker, Thad G.; Happer, William; Jau, Yuan-Yu (2009)
    • DAMOP Student Symposium 2009 

      Walker, Thad G. (2009-05-27)
      Presentation given at the student symposium for DAMOP 2009, Charlottesville, VA, May 21 2009. Includes an introduction to Rydberg physics with a description of recent experiments done at the University of Wisconsin
    • Dynamics of Low Density Rydberg Gases 

      Brekke, Erik; Day, Jason O.; Walker, Thad G. (2008-06-09)
      A state-dependent stimulated emission probe was used to investigate the coherent and dynamic properties of cold Rydberg atoms. 87Rb atoms were excited to various nl Rydberg states from a MOT via continuous two-photon ...
    • Jim Lawler's Science: Above and Below the H-Line 

      Walker, Thad G. (2018-04-27)
      This presentation gives an overview of Jim Lawler's career, focusing on a few of his important contributions to science.
    • Non-Degenerate Four-Wave Mixing through Rydberg States in a MOT 

      Day, Jason; Brekke, Erik; Walker, Thad G. (2007-07-02)
      In this work, we use a three-photon near-resonant process in a laser-cooled Rb vapor to achieve phase-matched four-wave mixing using an intermediate Rydberg state. Rydberg atoms in the 36D5/2 state are efficiently produced ...
    • Physics Challenges for Spin-Exchange Optical Pumping of He-3 

      Walker, Thad G. (2009-05-28)
      Presentation given at the "Physics and Applications of Polarized Noble Gases" workshop at the University of Virginia, May 19, 2009.
    • A Portable Ultrasensitive SERF Atomic Magnetometer for Biomagnetic Measurements 

      Proite, Nicholas; Cook, Peter; Li, Zhimin; Wakai, Ronald T.; Walker, Thad G.; Wyllie, Robert (2009-09-10)
      We present a portable Rb cell atomic magnetometer suited for biomagnetic measurements. Working in the spin-exchange relaxation free regime, we demonstrate an initial white noise floor of 60 fT$/\sqrt {Hz} $. We show an ...
    • A Portable Ultrasensitive SERF Atomic Magnetometer for Biomagnetic Measurements 

      Wyllie, Robert; Li, Zhimin; Cook, Peter; Wakai, Ronald T.; Walker, Thad G. (2007-07-02)
      We present a portable Rb cell atomic magnetometer suited for biomagnetic measurements. Working in the spin-exchange relaxation free regime, we demonstrate an initial white noise floor of 60 fT/sqrt {Hz}. We show an adult ...
    • RayTrace 

      Walker, Thad G. (1998-03-13)
      This applet traces paraxial light rays through a user-specified system of up to 12 ideal thin lenses and apertures, allowing many simple optical instruments to be modelled. Three examples are given: coupling of light from ...
    • Ultrasensitive Atomic Magnetometers 

      Wyllie, Robert; Wakai, Ronald T.; Walker, Thad G. (2009-09-10)
      We have developed a novel, small-volume portable single-channel atomic biomagnetometer and have used it to detect adult MCG signals. The cryogenic-free magnetometer has sufficiently high sensitivity (20 fT/rt(Hz)) that ...