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Boivin RL, Luxon JL, Austin ME, Brooks NH, Burrell KH, Doyle EJ, Fenstermacher ME, Gray DS, Groth M, Hsieh CL, Jayakumar RJ, Lasnier CJ, Leonard AW, McKee GR, Moyer RA, Rhodes TL, Rost JC, Rudakov DL, Schaffer MJ, Strait EJ, Thomas DM, Van Zeeland M, Watkins JG, Watson GW, Wong CPC. DIII-D Diagnostic Systems. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst05-a1043] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | | | - M. E. Austin
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- University of Texas–Austin, Austin, Texas
| | | | | | - E. J. Doyle
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- University of California–Los Angeles, Los Angeles, California
| | - M. E. Fenstermacher
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- Lawrence Livermore National Laboratory, Livermore, California/University of California–Los Angeles, Los Angeles, California
| | - D. S. Gray
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- University of California–San Diego, La Jolla, California
| | - M. Groth
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- Lawrence Livermore National Laboratory, Livermore, California/University of California–Los Angeles, Los Angeles, California
| | | | - R. J. Jayakumar
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- Lawrence Livermore National Laboratory, Livermore, California/University of California–Los Angeles, Los Angeles, California
| | - C. J. Lasnier
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- Lawrence Livermore National Laboratory, Livermore, California/University of California–Los Angeles, Los Angeles, California
| | | | - G. R. McKee
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- University of Wisconsin–Madison, Madison, Wisconsin
| | - R. A. Moyer
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- University of California–San Diego, La Jolla, California
| | - T. L. Rhodes
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- University of California–Los Angeles, Los Angeles, California
| | - J. C. Rost
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - D. L. Rudakov
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- University of California–San Diego, La Jolla, California
| | | | | | | | - M. Van Zeeland
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- University of Wisconsin–Madison, Madison, Wisconsin
| | - J. G. Watkins
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- Sandia National Laboratories, Albuquerque, New Mexico
| | - G. W. Watson
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
- University of California–Irvine, Irvine, California
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Luxon JL, Simonen TC, Stambaugh RD. Overview of the DIII-D Fusion Science Program. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst05-a1041] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- J. L. Luxon
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - T. C. Simonen
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - R. D. Stambaugh
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
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Schissel DP, Abla G, Flanagan S, Kim L, Lee X. The Between-Pulse Data Analysis Infrastructure at the DIII-D National Fusion Facility. FUSION SCIENCE AND TECHNOLOGY 2010. [DOI: 10.13182/fst10-a10920] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- D. P. Schissel
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - G. Abla
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - S. Flanagan
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - L. Kim
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
| | - X. Lee
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608
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Hillesheim JC, Peebles WA, Rhodes TL, Schmitz L, Carter TA, Gourdain PA, Wang G. A multichannel, frequency-modulated, tunable Doppler backscattering and reflectometry system. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2009; 80:083507. [PMID: 19725655 DOI: 10.1063/1.3205449] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A novel multichannel Doppler backscattering system has been designed and tested for application on the DIII-D [J. L. Luxon, Fusion Sci. Technol. 48, 828 (2005)] and National Spherical Torus Experiment (NSTX) [M. Ono et al., Nucl. Fusion 40, 557 (2000)] fusion plasma devices. Doppler backscattering measures localized intermediate wavenumber (k(perpendicular)rho(i) approximately 1-4,k(perpendicular) approximately 2-15 cm(-1)) density fluctuations and the propagation velocity of turbulent structures. Microwave radiation is launched at a frequency that approaches a cutoff layer in the plasma and at an angle that is oblique to the cutoff layer. Bragg backscattering occurs near the cutoff layer for fluctuations with k(perpendicular) approximately -2k(i), where k(i) is the incident probe wave vector at the scattering location. The turbulence propagation velocity can be determined from the Doppler shift in the return signal together with knowledge of the scattering wavenumber. Ray tracing simulations are used to determine k(perpendicular) and the scattering location. Frequency modulation of a voltage-controlled solid state microwave source followed by frequency multiplication is used to create an array of finely spaced (Delta f=350 MHz) frequencies spanning 1.4 GHz. The center of the array bandwidth is tunable within the range of approximately 53-78 GHz. This article details the system design, laboratory tests, and presents initial data from DIII-D plasmas.
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Affiliation(s)
- J C Hillesheim
- Department of Physics and Astronomy, University of California-Los Angeles, Los Angeles, California 90095-1547, USA.
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