Impurity Screening Studies in the Alcator C-mod Tokamak PDF Download
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Author: G. M. McCracken
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Author: G. M. McCracken
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Author: Robert Seth Granetz
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Author: G. M. McCracken
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Author: Igor Olegovich Bespamyatnov
Publisher:
ISBN:
Category : Charge exchange
Languages : en
Pages : 322
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A Charge-Exchange Recombination Spectroscopy (CXRS) diagnostic has been installed on Alcator C-Mod to study the transport of light impurities in plasma. The system provides spatially (1 cm) and temporally (12.5 msec) resolved measurements of the impurity density, temperature and flow velocities of the particular impurity. Two optical arrays: poloidal (19 channels) and toroidal (10 channels), collect the light emitted from excited impurity ion populated by charge exchange process from the Diagnostic Neutral Beam (DNB) particle. The attention of this dissertation is focused on the B4 (n = 7 [-->] 6) spectral line emitted by B4 ion formed in the following charge exchange reaction (H0 + B5+ [-->] H+ + B4+*). A complex spectral model was developed to simulate emission. The high magnetic fields of C-Mod result in broad Zeeman patterns which must be taken into account for the interpretation of the line shift and broadening in terms of impurity ion velocity and temperature. After the spectral line fitting and careful identification of the charge exchange component, the calculated Doppler broadening and shifts of the spectral line profile yield information on the ion temperature and rotation. Together with the calculation of the beam density, the absolute calibration of the CXRS optical system provides us with B5+ density measurement capabilities. One of the main objectives of this work was to use the acquired impurity density, temperature and flow velocity profiles to investigate plasma transport behavior and infer the radial electric field E[subscript R] from plasma force balance equation. The focus here was placed on the region of the Internal Transport Barrier (ITB) formation 0.35
Author: Michael Anthony Graf
Publisher:
ISBN:
Category :
Languages : en
Pages : 190
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Author: G. M. McCracken
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
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![Measurement of Impurity Ion Densities and Energies in the Divertor and Edge Regions of Alcator C-Mod Tokamak. [Lab. for Plasma Research, Univ. of Maryland, College Park]. PDF](https://books.google.com/books/content/images/frontcover/rrirAQAACAAJ?fife=w80-h100)
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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A study to investigate impurity production and transport in the divertor and edge regions of the Alcator C-Mod tokamak through spectroscopic techniques is described. A 0.75-meter Czerny-Turner spectrometer with a 1200-g/mm grating and a 35-meter quartz optic bundle transmission line were tested. A high-resolution 2-meter spectrometer will be ordered. Data acquisition considerations are being addressed. (RWR).
Author: Mark J. May
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
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Author: International Atomic Energy Agency
Publisher: Fusion Energy 1996
ISBN:
Category : Business & Economics
Languages : en
Pages : 956
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Proceedings of the Sixteenth International Conference, formerly called the International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Montreal, 7-11 October 1996. The papers presented reflect the excellent progress achieved since the last conference in Seville 1994. Among many other achievements, the Tokamak Fusion Test Reactor has produced over 10 MW of fusion power, the JT-60U experiment has demonstrated plasma conditions equivalent to breakeven, the reversed shear mode has been demonstrated, low aspect ratio tokamaks have produced promising results and plans have been drawn up for powerful new inertial confinement fusion experiments.
Author: Dimitrios Pappas
Publisher:
ISBN:
Category :
Languages : en
Pages : 191
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