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Investigation of electron gyro-scale fluctuations in the National Spherical Torus Experiment.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
書名/作者:	Investigation of electron gyro-scale fluctuations in the National Spherical Torus Experiment.
作者:	Smith, David Ryan.
面頁冊數:	129 p.
附註:	Source: Dissertation Abstracts International, Volume: 70-03, Section: B, page: 1732.
Contained By:	Dissertation Abstracts International70-03B.
標題:	Physics, Fluid and Plasma.
標題:	Energy.
ISBN:	9781109065534
摘要、提要註:	Anomalous electron thermal transport in magnetically-confined plasma hinders efforts to achieve feasible magnetic fusion energy, and an adequate understanding of anomalous electron thermal transport remains elusive. Gyrokinetic simulations of plasma turbulence indicate electron temperature gradient (ETG) turbulence may generate experimentally-relevant electron thermal transport. To investigate ETG turbulence, a collective scattering system was installed on the National Spherical Torus Experiment (NSTX). Collective scattering provides fluctuation measurements with spatial and k-space localization, and the NSTX collective scattering system measures fluctuations on the electron gyro-scale. This Dissertation describes the design and operation of the NSTX collective scattering system and presents fluctuation measurements, gyrokinetic calculations, and transport calculations pertaining to ETG turbulence. Measurements and analysis indicate electron gyro-scale fluctuations are present in a variety of NSTX plasma regimes, and the observed fluctuations are consistent with ETG turbulence. Additional results pertain to the ETG critical gradient, flow shear suppression of ETG turbulence, ETG-driven electron thermal transport, fluctuation magnitudes, and k-spectra. The measurements can be a challenging validation test for nonlinear gyrokinetic simulations.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3350836

Investigation of electron gyro-scale fluctuations in the National Spherical Torus Experiment.
Smith, David Ryan.

Investigation of electron gyro-scale fluctuations in the National Spherical Torus Experiment. - 129 p.

Source: Dissertation Abstracts International, Volume: 70-03, Section: B, page: 1732.

Thesis (Ph.D.)--Princeton University, 2009.

Anomalous electron thermal transport in magnetically-confined plasma hinders efforts to achieve feasible magnetic fusion energy, and an adequate understanding of anomalous electron thermal transport remains elusive. Gyrokinetic simulations of plasma turbulence indicate electron temperature gradient (ETG) turbulence may generate experimentally-relevant electron thermal transport. To investigate ETG turbulence, a collective scattering system was installed on the National Spherical Torus Experiment (NSTX). Collective scattering provides fluctuation measurements with spatial and k-space localization, and the NSTX collective scattering system measures fluctuations on the electron gyro-scale. This Dissertation describes the design and operation of the NSTX collective scattering system and presents fluctuation measurements, gyrokinetic calculations, and transport calculations pertaining to ETG turbulence. Measurements and analysis indicate electron gyro-scale fluctuations are present in a variety of NSTX plasma regimes, and the observed fluctuations are consistent with ETG turbulence. Additional results pertain to the ETG critical gradient, flow shear suppression of ETG turbulence, ETG-driven electron thermal transport, fluctuation magnitudes, and k-spectra. The measurements can be a challenging validation test for nonlinear gyrokinetic simulations.

ISBN: 9781109065534Subjects--Topical Terms:

422969
Physics, Fluid and Plasma.

Investigation of electron gyro-scale fluctuations in the National Spherical Torus Experiment.
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100 1 $a Smith, David Ryan. $3 422967
245 1 0 $a Investigation of electron gyro-scale fluctuations in the National Spherical Torus Experiment.
300 $a 129 p.
500 $a Source: Dissertation Abstracts International, Volume: 70-03, Section: B, page: 1732.
500 $a Adviser: Ernesto Mazzucato.
502 $a Thesis (Ph.D.)--Princeton University, 2009.
520 $a Anomalous electron thermal transport in magnetically-confined plasma hinders efforts to achieve feasible magnetic fusion energy, and an adequate understanding of anomalous electron thermal transport remains elusive. Gyrokinetic simulations of plasma turbulence indicate electron temperature gradient (ETG) turbulence may generate experimentally-relevant electron thermal transport. To investigate ETG turbulence, a collective scattering system was installed on the National Spherical Torus Experiment (NSTX). Collective scattering provides fluctuation measurements with spatial and k-space localization, and the NSTX collective scattering system measures fluctuations on the electron gyro-scale. This Dissertation describes the design and operation of the NSTX collective scattering system and presents fluctuation measurements, gyrokinetic calculations, and transport calculations pertaining to ETG turbulence. Measurements and analysis indicate electron gyro-scale fluctuations are present in a variety of NSTX plasma regimes, and the observed fluctuations are consistent with ETG turbulence. Additional results pertain to the ETG critical gradient, flow shear suppression of ETG turbulence, ETG-driven electron thermal transport, fluctuation magnitudes, and k-spectra. The measurements can be a challenging validation test for nonlinear gyrokinetic simulations.
590 $a School code: 0181.
650 4 $a Physics, Fluid and Plasma. $3 422969
650 4 $a Energy. $3 422946
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710 2 $a Princeton University. $3 422968
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790 1 0 $a Mazzucato, Ernesto, $e advisor
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791 $a Ph.D.
792 $a 2009
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