A. Ince-Cushman

The Ar17 +Lyα2/Lyα1ratio in Alcator C-Mod tokamak plasmas

J. E. Rice, M.L. Reinke, J. M. A. Ashbourn, A. Ince-Cushman et autres

High-quality spectra of hydrogen-like Ar 17 + have been obtained from Alcator C-Mod tokamak plasmas using a spatially imaging high-resolution x-ray spectrometer system in an extensive study of the underlying high- n satellite lines. The ratio of Ly α2 (1S 1/2 –2P …

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Imaging with spherically bent crystals or reflectors

M. Bitter, L. Delgado-Aparicio, K. W. Hill, S. D. Scott et autres

This paper consists of two parts: part I describes the working principle of a recently developed x-ray imaging crystal spectrometer, where the astigmatism of spherically bent crystals is being used with advantage to record spatially resolved spectra of highly charged ions for …

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Imaging with Spherically Bent Crystals or Reflectors

M. Bitter, K. W. Hill, Steven Scott, A. Ince-Cushman et autres

This paper consists of two parts: Part I describes the working principle of a recently developed x-ray imaging crystal spectrometer, where the astigmatism of spherically bent crystals is being used with advantage to record spatially resolved spectra of highly charged ions for …

ICRF Mode Conversion Flow Drive on Alcator C-Mod

Y. Lin, J. E. Rice, S.J. Wukitch, M. Greenwald et autres

Lower hybrid heating and current drive on the Alcator C-Mod tokamak

J. R. Wilson, R. Parker, M. Bitter, P. T. Bonoli et autres

On the Alcator C-Mod tokamak, lower hybrid current drive (LHCD) is being used to modify the current profile with the aim of obtaining advanced tokamak (AT) performance in plasmas with parameters similar to those that would be required on ITER. To date, …

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Overview of the Alcator C-Mod Research Program

E. Marmar, A. Bader, M. Bakhtiari, Harold Barnard et autres

This paper summarizes highlights of research results from the Alcator C-Mod tokamak covering the period 2006–2008. Active flow drive, using mode converted ion cyclotron waves, has been observed for the first time in a tokamak plasma, using a mix of D and …

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Observation of ion cyclotron range of frequencies mode conversion plasma flow drive on Alcator C-Mod

Y. Lin, J. E. Rice, S.J. Wukitch, M. Greenwald et autres

At modest H3e levels (n3He/ne∼8%–12%), in relatively low density D(H3e) plasmas, n¯e≤1.3×1020 m−3, heated with 50 MHz rf power at Bt0∼5.1 T, strong (up to 90 km/s) toroidal rotation (Vϕ) in the cocurrent direction has been observed by high-resolution x-ray spectroscopy on …

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Observation of Self-Generated Flows in Tokamak Plasmas with Lower-Hybrid-Driven Current

A. Ince-Cushman, J. E. Rice, M.L. Reinke, M. Greenwald et autres

In Alcator C-Mod discharges lower hybrid waves have been shown to induce a countercurrent change in toroidal rotation of up to 60 km/s in the central region of the plasma (r/a approximately <0.4). This modification of the toroidal rotation profile develops on …

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Observations of counter-current toroidal rotation in Alcator C-Mod LHCD plasmas

J. E. Rice, A. Ince-Cushman, P. Bonoli, M. Greenwald et autres

Following the application of lower hybrid current drive (LHCD) power, the core toroidal rotation in Alcator C-Mod L- and H-mode plasmas is found to increment in the counter-current direction, in conjunction with a decrease in the plasma internal inductance, l i . …

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Control of Internal Profiles via LHCD on Alcator C-Mod

J. R. Wilson, R.R. Parker, P. T. Bonoli, A. Hubbard et autres

LHCD on Alcator C-Mod is being used in plasmas with parameters similar to those expected on ITER for the purpose of tailoring the plasma current profile.LHCD experiments have also produced intriguing results related to momentum transport and edge pedestal physics that affect …

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ICRF Mode Conversion Flow Drive on Alcator C-Mod and Projections to Other Tokamaks

Y. Lin, J. E. Rice, S.J. Wukitch, M. Greenwald et autres

Plasma flow drive via ICRF mode conversion (MC) has been demonstrated on Alcator C‐Mod. The toroidal rotation in these D(3He) MC plasmas is typically more than twice above the empirically determined intrinsic rotation scaling in ICRF minority heated plasmas. In L‐mode plasmas …

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Analyzing the Radiation Properties of High-Z Impurities in High-Temperature Plasmas

M.L. Reinke, A. Ince-Cushman, Y. Podpaly, John E. Rice et autres

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation M. L. Reinke, A. Ince‐Cushman, Y. Podpaly, J. E. …

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