TITLE

Measurement of magnetic fluctuation-induced particle flux (invited)

AUTHOR(S)
Ding, W. X.; Brower, D. L.; Yates, T. Y.
PUB. DATE
October 2008
SOURCE
Review of Scientific Instruments;Oct2008, Vol. 79 Issue 10, p10E701
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Magnetic field fluctuation-induced particle transport has been directly measured in the high-temperature core of the MST reversed field pinch plasma. Measurement of radial particle transport is achieved by combining various interferometry techniques, including Faraday rotation, conventional interferometry, and differential interferometry. It is observed that electron convective particle flux and its divergence exhibit a significant increase during a sawtooth crash. In this paper, we describe the basic techniques employed to determine the particle flux.
ACCESSION #
35150201

 

Related Articles

  • Upper bounds on fluctuational power absorption in a turbulent pinch. Wang, Cai Yi; Bhattacharjee, A.; Hameiri, Eliezer // Physics of Fluids B: Plasma Physics;Mar91, Vol. 3 Issue 3, p715 

    An upper bound is given for the fluctuational power absorption in a steady, driven reversed-field pinch. The functional χ, which is the ratio of the power dissipated by fluctuations to the mean Ohmic power, is expressed in terms of the mean magnetic field B0 by using energy conservation....

  • Quasi-single helicity states in the reversed field pinch: Beyond the standard paradigm. Martin, P.; Buffa, A.; Cappello, S.; D'Angelo, F.; Escande, D. F.; Franz, P.; Marrelli, L.; Martines, E.; Ortolani, S.; Spizzo, G.; Bilato, R.; Bolzonella, T.; Costa, S.; Murari, A.; Paccagnella, R.; Pasqualotto, R.; Terranova, D.; Zanca, P. // Physics of Plasmas;May2000, Vol. 7 Issue 5, p1984 

    This paper reports experimental results showing that coherent helical structures are formed in the reversed field pinch (RFP) self-organizing plasma core as a result of transitions to states where the n-spectrum of the m=1 modes is dominated by a single (1,n[sub max]) geometrical helicity. These...

  • Measurement of current profile dynamics in the Madison Symmetric Torus. Terry, S.D.; Brower, D.L.; Ding, W.X.; Anderson, J.K.; Biewer, T.M.; Chapman, B.E.; Craig, D.; Forest, C.B.; O'Connell, R.; Prager, S.C.; Sarff, J.S. // Physics of Plasmas;Mar2004, Vol. 11 Issue 3, p1079 

    The current profile and core magnetic field fluctuation amplitudes in a reversed-field pinch are measured by using a high-resolution polarimetry–interferometry system. This paper presents data showing a redistribution of the current during a sawtooth crash. Also, the core magnetic field...

  • Coherent magnetic field fluctuations and locked modes in a reversed-field pinch. Brunsell, P. R.; Yagi, Y.; Hirano, Y.; Maejima, Y.; Shimada, T. // Physics of Fluids B: Plasma Physics;Mar93, Vol. 5 Issue 3, p885 

    Magnetic field fluctuations have been measured in the TPE-1RM20 reversed-field pinch [in Plasma Physics and Controlled Nuclear Fusion Research, Proceedings of the 14th International Conference, 1992, Würzburg (International Atomic Energy Agency, Vienna, 1992) Paper IAEA-CN-56/C-4-3]. The...

  • Correlation between internal tearing modes and edge electrostatic fluctuations in a... Guoxiang Li; Drake, J.R.; Bergsaker, H.; Brzozowski, J.H.; Hellblom, G.; Mazur, S.; Moller, A.; Nordlund, P. // Physics of Plasmas;Jul95, Vol. 2 Issue 7, p2615 

    Examines the correlation between edge electrostatic fluctuations in the Extrap T1 reversed-field pinch and internal tearing mode activity. Nonlinear coupling between low frequency internal-tearing mode-related activity and high frequency, external, electrostatic fluctuations; Scaling of the...

  • Experimental scaling of fluctuations and confinement with Lundquist number in the reversed-field.... Stoneking, M.R.; Chapman, J.T.; Den Hartog, D.J.; Prager, S.C.; Sarff, J.S. // Physics of Plasmas;Apr98, Vol. 5 Issue 4, p1004 

    Examines the scaling of the magnetic and velocity fluctuations with Lundquist number (S) in a reversed-field pinch (RFP) plasma. Independence of fluctuations from S at low density; Details on the range of measured exponents; Implications on the peak velocity fluctuations in a sawtooth scale.

  • Magnetic and velocity fluctuation measurements in the REPUTE-1 reversed-field pinch plasma. Ejiri, Akira; Ohdachi, Satoshi; Oikawa, Toshihiro; Shinohara, Shunjiro; Yamagishi, Kenichi; Toyama, Hiroshi; Miyamoto, Kenro // Physics of Plasmas;May94, Vol. 1 Issue 5, p1177 

    Focuses on magnetic and velocity fluctuations in the REPUTE-1 reversed-field pinch (RFP). Measurement of velocity fluctuation in an RFP plasma; Estimation of the level of magnetohydrodynamic dynamo term from magnetic fluctuations at the surface correlation changes.

  • Edge resonant fluctuations and particle transport in a reversed-field pinch. Moller, A. // Physics of Plasmas;Dec98, Vol. 5 Issue 12, p4321 

    Measures the electrostatic fluctuations in the Extrap T2 reversed-field pinch. Derivation of the electrostatic fluctuation driven particle transport; Percentage of the total fluctuation power contained in the peak; Presence of a higher coherence in the edge resonant fluctuations;...

  • Reversed field pinch plasma equilibria with shear flow. Sugimoto, Hisaya; Ashida, Hisao; Kurasawa, Takasi // Physics of Plasmas;Jun2001, Vol. 8 Issue 6, p2771 

    The Grad-Shafranov equation with flow, which is derived by a variational method, involves unknown functions such as the dynamic pressure, P(Ψ). These functions are specified by minimizations of free energies under the constraints of constant P[sup ′](Ψ), magnetic helicity, flow...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics