TITLE

Fluid-flow characterization with nuclear spins without magnetic resonance

AUTHOR(S)
Crawford, C. W.; Shoujun Xu; Siegel, Eric J.; Budker, Dmitry; Pines, Alexander
PUB. DATE
September 2008
SOURCE
Applied Physics Letters;9/1/2008, Vol. 93 Issue 9, p092507
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A technique for noninvasive monitoring of flow inside metallic enclosures using laser-based atomic magnetometry is introduced. The analyte is labeled via nuclear magnetization by magnets, thereby combining the polarization and encoding steps. No radiofrequency or audiofrequency pulses are involved. We demonstrate detection of flow inside an aluminum pipe with an inner diameter of 4.9 mm that has a constriction with a diameter of 1.6 mm and a length of 6.4 mm. The results agree with a model of spin density and relaxation indicating that our technique allows for fast, quantitative, and noninvasive diagnostics of flow with potential applications discussed below.
ACCESSION #
34360664

 

Related Articles

  • One-electron versus electron–electron interaction contributions to the spin–spin coupling mechanism in nuclear magnetic resonance spectroscopy: Analysis of basic electronic effects. Gräfenstein, Jürgen; Cremer, Dieter // Journal of Chemical Physics;12/22/2004, Vol. 121 Issue 24, p12217 

    For the first time, the nuclear magnetic resonance (NMR) spin–spin coupling mechanism is decomposed into one-electron and electron–electron interaction contributions to demonstrate that spin-information transport between different orbitals is not exclusively an electron-exchange...

  • Spin Decoherence in Quantum Dots. Bhaktavatsala Rao, D. D.; Ravishankar, V.; Subrahmanyam, V. // AIP Conference Proceedings;2006, Vol. 864 Issue 1, p104 

    The decoherence of a spin-1/2 particle (qubit) interacting with a nuclear spin bath in quantum dots has been studied using an isotropic Heisenberg model. An effective magnetic field (a feature of unitary evolution) and an effective temperature (a non-unitary feature) describe the effective...

  • Considerations For The Optimal Polarization of 3He Targets. Brown, Brielin // AIP Conference Proceedings;8/4/2009, Vol. 1149 Issue 1, p895 

    The main characteristics of a polarized 3He are maximum polarization, spin-up time, and cell lifetime. New hybrid K-Rb cells have higher polarization and shorter spin-up times. However, operating conditions also have a large impact on the operational characteristics of a cell. Here, hybrid K-Rb...

  • Extended Flip-back Schemes for Sensitivity Enhancement in Multidimensional HSQC-type Out-and-back Experiments. Diercks, Tammo; Daniels, Mark; Kaptein, Robert // Journal of Biomolecular NMR;Dec2005, Vol. 33 Issue 4, p243 

    In many NMR experiments, only polarisation of a limited sub-set of all protons is converted into observable coherence. As recently shown by the “longitudinal” TROSY implementation (Pervushin et al. (2002) J. Am. Chem. Soc., 124, 12898–12902) and SOFAST-HMQC (Schanda and...

  • A high-speed nuclear-magnetic-resonance data-acquisition system with a personal computer for a polarized target in high-energy physics. Sakanaka, Shogo; Dohmae, Kazuhiko; Hayashi, Naoki; Horikawa, Naoaki; Iwata, Takahiro; Kishi, Atsushi; Matsuda, Tatsuro; Nakanishi, Tsutomu; Okumi, Shoji; Wakai, Atsushi; Mori, Kunikazu // Review of Scientific Instruments;Jul1991, Vol. 62 Issue 7, p1859 

    A high-speed nuclear-magnetic-resonance (NMR) data-acquisition system, incorporating a personal computer, has been developed to determine the polarization of the polarized target for high-energy physics experiments. A dedicated analog-to-digital converter (ADC) board is used for automatic ADC...

  • Time-optimal control of spin 1/2 particles in the presence of radiation damping and relaxation. Zhang, Y.; Lapert, M.; Sugny, D.; Braun, M.; Glaser, S. J. // Journal of Chemical Physics;2/7/2011, Vol. 134 Issue 5, p054103 

    We consider the time-optimal control of an ensemble of uncoupled spin 1/2 particles in the presence of relaxation and radiation damping effects, whose dynamics is governed by nonlinear equations generalizing the standard linear Bloch equations. For a single spin, the optimal control strategy can...

  • Nuclear spin polarization transfer across an organic-semiconductor interface. Goehring, Lucas; Michal, Carl A. // Journal of Chemical Physics;11/15/2003, Vol. 119 Issue 19, p10325 

    Motivated by Tycko’s proposal to harness optically pumped nuclear spin polarization for the enhancement of nuclear magnetic resonance (NMR) signals from biological macromolecules, we investigate the transfer of thermal nuclear spin polarization between [sup 1]H or [sup 19]F in an organic...

  • Optical Pumping Spin Exchange 3He Gas Cells for Magnetic Resonance Imaging. Kim, W.; Stepanyan, S. S.; Kim, A.; Jung, Y.; Woo, S.; Yurov, M.; Jang, J. // AIP Conference Proceedings;8/4/2009, Vol. 1149 Issue 1, p833 

    We present a device for spin-exchange optical pumping system to produce large quantities of polarized noble gases for Magnetic Resonance Imaging (MRI). A method and design of apparatus for pumping the polarization of noble gases is described. The method and apparatus enable production, storage...

  • Optical Enhancement of 15N Nuclear Magnetic Resonance in Zinc-blende Ga15N. Morris, R. D.; Kent, A. J.; Geen, H. L.; Foxon, C. T.; Novikov, S. V. // AIP Conference Proceedings;2007, Vol. 893 Issue 1, p1343 

    We have observed enhancement of the nuclear dipolar alignment of 15N in cubic Ga15N by optical pumping. Illumination of the sample with polarized band-gap light creates spin polarization of the electronic conduction band. Polarization is transferred to the 15N nuclei by Overhauser-type...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics