TITLE

Linewidth-modulated motional Stark effect measurements of internal field structure in low-field configurations

AUTHOR(S)
Reinecke, E. A.; Fonck, R. J.; Thorson, T. A.
PUB. DATE
January 2001
SOURCE
Review of Scientific Instruments;Jan2001, Vol. 72 Issue 1, p1000
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Motional Stark effect measurements of internal field structure in low-field magnetic confinement configurations are considered for both magnitude and direction of the local magnetic field. The amplitude and phase delay of an oscillating spectral linewidth driven by a rotating polarizer provides a means of determining the magnitude and direction of the total field simultaneously while avoiding difficulties of neutral beam energy drift. Photon-noise limit estimates for a diagnostic beam on the low-field PEGASUS toroidal experiment indicate sensitivities of roughly 20 G and 0.2° for the magnitude and direction angle. These values are sufficient to provide significant constraints on magnetic equilibrium reconstructions. © 2001 American Institute of Physics.
ACCESSION #
4717027

 

Related Articles

  • Circular dichroism effect for linear molecules induced by a resonant circularly polarized pumping optical field. Ren-hui Zheng; Dong-ming Chen; Wen-mei Wei; Tian-jing He; Fan-chen Liu // Journal of Chemical Physics;10/8/2004, Vol. 121 Issue 14, p6835 

    In this paper we propose and discuss the laser-induced circular dichroism (LICD) effect, which is expected to occur in linear molecules pumped by a strong circular resonant light beam. The effect is to be detected via the absorption of a weak circularly polarized probe beam on another...

  • Two-point motional Stark effect diagnostic for Madison Symmetric Torus. Ko, J.; Den Hartog, D. J.; Caspary, K. J.; Den Hartog, E. A.; Pablant, N. A.; Summers, H. P. // Review of Scientific Instruments;Oct2010, Vol. 81 Issue 10, p10D702 

    A high-precision spectral motional Stark effect (MSE) diagnostic provides internal magnetic field measurements for Madison Symmetric Torus (MST) plasmas. Currently, MST uses two spatial views-on the magnetic axis and on the midminor (off-axis) radius, the latter added recently. A new analysis...

  • Motional Stark effect diagnostic pilot experiment for MAST. Kuldkepp, M.; Walsh, M. J.; Carolan, P. G.; Conway, N. J.; Hawkes, N. C.; McCone, J.; Rachlew, E.; Wearing, G. // Review of Scientific Instruments;Oct2006, Vol. 77 Issue 10, p10E905 

    Exploiting the motional Stark effect (MSE) in the low magnetic fields of spherical tokamaks such as MAST is complicated by the Doppler smearing of the relatively closely spaced Stark components. Extensive modeling of MSE spectra and the subsequent polarized fraction (∼20%) of spectrally...

  • First charge exchange recombination spectroscopy and motional Stark effect results from the Madison Symmetric Torus reversed field pinch. Craig, D.; Den Hartog, D. J.; Fiksel, G.; Davydenko, V. I.; Ivanov, A. A. // Review of Scientific Instruments;Jan2001, Vol. 72 Issue 1, p1008 

    We report on the first results of charge exchange recombination spectroscopy (CHERS) and motional Stark effect (MSE) measurements in the Madison Symmetric Torus reversed field pinch. A 30 keV, 4 A neutral H beam is used in combination with visible and ultraviolet spectroscopy to make the...

  • Measurements and Calculations of Stark Broadening and Shift Parameters of Selected Spectral Transitions of NI. Bacławski, A.; Bartecka, A.; Musielok, J. // AIP Conference Proceedings;2006, Vol. 812 Issue 1, p403 

    We present new measurements of broadening and shift parameters for 5 NI multiplets from the infrared region of the spectrum. The selected spectra have been excited in a wall-stabilized high-current arc operated in a helium-nitrogen mixture with traces of hydrogen for diagnostic purposes. Primary...

  • Measurement of magnetic field pitch angle using motional Stark effect spectroscopy in the compact helical system. Takayama, Sadatsugu; Ida, Katsumi; Okamura, Shouichi; Kado, Shinichiro // Review of Scientific Instruments;Jan2003, Vol. 74 Issue 1, p73 

    A spectroscopy system, which consists of a zigzag charge coupled device and ferroelectric liquid crystal cells, has been developed to measure magnetic field pitch angles. The magnetic field pitch angle is derived from the polarization angle of σ and π components in the Hα line measured...

  • The Regularities of the Dynamic Stark Effect in Rare Gases. Koryukina, E. // Russian Physics Journal;Sep2005, Vol. 48 Issue 9, p891 

    The regularities of the dynamic Stark effect in a high-frequency discharge in rare gases as well as the regularities observed under shift and splitting of spectral lines in the electric field for helium, neon, argon, and krypton are studied theoretically. The Schrodinger equation is solved by...

  • The motional Stark effect diagnostic on TEXTOR-94: First measurements. Soetens, T.; Jaspers, R.; Desoppere, E. // Review of Scientific Instruments;Jan1999, Vol. 70 Issue 1, p890 

    Describes the development of a diagnostic to measure the motional Stark effect (MSE) on TEXTOR-94 limiter tokamak. Source of the motional Stark effect; Components of the MSE diagnostic; Proportionality of the toroidal magnetic field to the major radius of the observation volume.

  • Weak localization thickness measurements of Si:P delta-layers. Sullivan, D. F.; Kane, B. E.; Thompson, P. E. // Applied Physics Letters;12/27/2004, Vol. 85 Issue 26, p6362 

    We report on our results for the characterization of Si:P delta-layers grown by low temperature molecular beam epitaxy. Our data show that the effective thickness of a delta-layer can be obtained through a weak localization analysis of electrical transport measurements performed in perpendicular...

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