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Neilson GH, Heitzenroeder PJ, Nelson BE, Reiersen WT, Brooks A, Brown TG, Chrzanowski JH, Cole MJ, Dahlgren F, Dodson T, Dudek LE, Ellis RA, Fan HM, Fogarty PJ, Freudenberg KD, Goranson PL, Harris JH, Kalish MR, Labik G, Lyon JF, Pomphrey N, Priniski CD, Raftopoulos S, Rej DJ, Sands WR, Simmons RT, Stratton BE, Strykowsky RL, Viola ME, Williamson DE, Zarnstorff MC. Engineering Accomplishments in the Construction of NCSX. Fusion Science and Technology 2017. [DOI: 10.13182/fst09-a8950] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- G. H. Neilson
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | | | - B. E. Nelson
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, TN 37831
| | - W. T. Reiersen
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - A. Brooks
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - T. G. Brown
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - J. H. Chrzanowski
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - M. J. Cole
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, TN 37831
| | - F. Dahlgren
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - T. Dodson
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - L. E. Dudek
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - R. A. Ellis
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - H. M. Fan
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - P. J. Fogarty
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, TN 37831
| | | | - P. L. Goranson
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, TN 37831
| | - J. H. Harris
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, TN 37831
| | - M. R. Kalish
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - G. Labik
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - J. F. Lyon
- Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, TN 37831
| | - N. Pomphrey
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - C. D. Priniski
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - S. Raftopoulos
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - D. J. Rej
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - W. R. Sands
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - R. T. Simmons
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - B. E. Stratton
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - R. L. Strykowsky
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | - M. E. Viola
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
| | | | - M. C. Zarnstorff
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, NJ 08543
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LeBlanc BP, Diallo A, Labik G, Stevens DR. Radial resolution enhancement of the NSTX Thomson scattering diagnostic. Rev Sci Instrum 2012; 83:10D527. [PMID: 23126867 DOI: 10.1063/1.4738655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Current magnetic confinement plasma physics research has increased the demand for radial resolution in profile diagnostics, in particular in the edge and pedestal regions. On NSTX, an upgrade of the existing multi-point Thomson scattering diagnostic has been implemented in order to respond to the research program needs. Twelve new radial channels have been added bringing the total number of positions to 42. Four previously un-instrumented fiber bundles were put in service. Eight existing "active" fiber bundles were divided in two sub-bundles each in order to increase spatial resolution. Twelve radial channels now cover the pedestal region with a resolution near one centimeter. Fifteen radial channels cover the core and internal transport barrier regions. Two additional channels were added, one near the inner edge and one in the outer scrape-off layer. The intersection of the focused viewing optics field of view with a finite-width laser beam results in major-radius cross talk between adjacent fiber sub-bundles. A discussion and calculation of the cross talk will be presented.
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Affiliation(s)
- B P LeBlanc
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA.
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Abstract
The paper discusses the projected configuration of the Thomson system on the National Spherical Torus Experiment (NSTX-U). In this paper, we discuss the projected configuration of the Thomson system on NSTX-U. More specifically, we determine, through both optical modeling of the collection optics and in-vessel measurements, that the collecting fibers are to be displaced by at most 1 cm toward the imaging plane along the optical axis. Finally, we estimate the performance of the Thomson system in measuring the electron temperature for NSTX-U discharges.
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Affiliation(s)
- A Diallo
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451, USA.
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Smith DR, Feder H, Feder R, Fonck RJ, Labik G, McKee GR, Schoenbeck N, Stratton BC, Uzun-Kaymak I, Winz G. Overview of the beam emission spectroscopy diagnostic system on the National Spherical Torus Experiment. Rev Sci Instrum 2010; 81:10D717. [PMID: 21033910 DOI: 10.1063/1.3478660] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A beam emission spectroscopy (BES) system has been installed on the National Spherical Torus Experiment (NSTX) to study ion gyroscale fluctuations. The BES system measures D(α) emission from a deuterium neutral heating beam. The system includes two optical views centered at r/a≈0.45 and 0.85 and aligned to magnetic field pitch angles at the neutral beam. f/1.5 collection optics produce 2-3 cm spot sizes at the neutral beam. The initial channel layout includes radial arrays, poloidal arrays, and two-dimensional grids. Radial arrays provide coverage from r/a≈0.1 to beyond the last-closed flux surface. Photodetectors and digital filters provide high-sensitivity, low-noise measurements at frequencies of up to 1 MHz. The BES system will be a valuable tool for investigating ion gyroscale turbulence and Alfvén/energetic particle modes on NSTX.
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Affiliation(s)
- D R Smith
- Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
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