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Lyon JF, Bell GL, Bell JD, Benson RD, Bigelow TS, Chipley KK, Colchin RJ, Cole MJ, Crume EC, Dunlap JL, England AC, Glowienka JC, Goulding RH, Harris JH, Hillis DL, Hiroe S, Horton LD, Howe HC, Isler RC, Jernigan TC, Johnson RL, Langley RA, Menon MM, Mioduszewski PK, Morris RN, Murakami M, Neilson GH, Nelson BE, Rasmussen DA, Rome JA, Saltmarsh MJ, Thompson PB, Wade MR, White JA, White TL, Whitson JC, Wilgen JB, Wing WR. Construction and Initial Operation of the Advanced Toroidal Facility. ACTA ACUST UNITED AC 2017. [DOI: 10.13182/fst90-a29169] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- J. F. Lyon
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - G. L. Bell
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - J. D. Bell
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - R. D. Benson
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - T. S. Bigelow
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - K. K. Chipley
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - R. J. Colchin
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - M. J. Cole
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - E. C. Crume
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - J. L. Dunlap
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - A. C. England
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - J. C. Glowienka
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - R. H. Goulding
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - J. H. Harris
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - D. L. Hillis
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - S. Hiroe
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - L. D. Horton
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - H. C. Howe
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - R. C. Isler
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - T. C. Jernigan
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - R. L. Johnson
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - R. A. Langley
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - M. M. Menon
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - P. K. Mioduszewski
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - R. N. Morris
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - M. Murakami
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - G. H. Neilson
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - B. E. Nelson
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - D. A. Rasmussen
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - J. A. Rome
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - M. J. Saltmarsh
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - P. B. Thompson
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - M. R. Wade
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - J. A. White
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - T. L. White
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - J. C. Whitson
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - J. B. Wilgen
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
| | - W. R. Wing
- Oak Ridge National Laboratory, P.O. Box 2009 Oak Ridge, Tennessee 37831-8072
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Brooks NH, Colchin RJ, Fehling DT, Hillis DL, Mu Y, Unterberg E. Filterscopes: spectral line monitors for long-pulse plasma devices. Rev Sci Instrum 2008; 79:10F330. [PMID: 19044638 DOI: 10.1063/1.2957777] [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: 05/27/2023]
Abstract
A photomultiplier (PMT)-based diagnostic system for monitoring spectral lines along multiple viewchords, named the "Filterscope" [R. J. Colchin et al., Rev. Sci. Instrum. 74, 2068 (2003)], is currently in use at the DIII-D, NSTX, and CDX-U fusion plasma devices in the US, and has been installed at the KSTAR device in Korea. This diagnostic has recently been upgraded for application to long-pulse devices, such as KSTAR, EAST in China, and the future ITER in France. A new data acquisition system, employing the PXI instrumentation platform with an embedded Windows microprocessor controller, can simultaneously record up to 72 channels at 100 kHz sampling rates for plasma periods lasting up to 20 min. Based on the average signal level during an adjustable time interval (100 ms in the present DIII-D implementation), the controller digitally adjusts PMT dynode voltage throughout the course of a discharge, thereby maintaining the output signals at a level where they are neither saturated nor dominated by digitizer noise. The new system's ability to accommodate large variations in source strength, discharge to discharge and within a single discharge, has proved particularly valuable during DIII-D operations, since changes between top, bottom, and double-null divertor magnetic configurations lead to large temporal variations in signal brightness.
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Affiliation(s)
- N H Brooks
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA
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Colchin RJ, Schaffer MJ, Carreras BA, McKee GR, Maingi R, Carlstrom TN, Rudakov DL, Greenfield CM, Rhodes TL, Doyle EJ, Brooks NH, Austin ME. Slow L-H transitions in DIII-D plasmas. Phys Rev Lett 2002; 88:255002. [PMID: 12097092 DOI: 10.1103/physrevlett.88.255002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2001] [Indexed: 05/23/2023]
Abstract
The transition from the low to the high mode of plasma confinement ( L-H transition) is studied in the DIII-D by an experimental technique which allows an arbitrarily slow transition. During an initial transition, periodic turbulent instability bursts are observed near the separatrix which inhibit the full transition. These bursts are damped by self-generated shear flows, and a predator-prey-type relationship is shown to give a good description of the data. As the neutral-beam power is raised, the oscillations change to type III edge localized modes. Another transition then leads to a quiet H mode.
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Affiliation(s)
- R J Colchin
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8072, USA
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Wilgen JB, Murakami M, Harris JH, Bigelow TS, Dory RA, Carreras BA, Aceto SC, Batchelor DB, Baylor LR, Bell GL, Bell JD, Colchin RJ, Crume EC, Dominguez N, Dunlap JL, Dyer GR, England AC, Gandy RF, Glowienka JC, Goldfinger RC, Goulding RH, Hanson GR, Hidalgo C, Hiroe S, Hirshman SP, Horton LD, Howe HC, Hutchinson DP, Isler RC, Jernigan TC, Ji H, Kaneko H, Kovrizhnykh LM, Kwon M, Langley RA, Lee DK, Likin KM, Lyon JF, Ma CH, Menon MM, Mioduszewski PK, Motojima O, Okada H, Paul S, Qualls AL, Rasmussen DA, Richards RK, Rome JA, Saltmarsh MJ, Sarksyan KA, Sato M, Schwelberger JG, Shaing KC, Shats MG, Shepard TD, Simpkins JE, Thomas CE, Uckan T, Vander Sluis KL, Wade MR, Wing WR, Yamada H, Zielinski JJ. Fluctuation and modulation transport studies in the Advanced Toroidal Facility (ATF) torsatron*. ACTA ACUST UNITED AC 1993. [DOI: 10.1063/1.860737] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Harris JH, Anabitarte E, Bell GL, Bell JD, Bigelow TS, Carreras BA, Charlton LA, Colchin RJ, Crume EC, Dominguez N, Dunlap JL, Dyer GR, England AC, Gandy RF, Glowienka JC, Halliwell JW, Hanson GR, Hidalgo‐Vera C, Hillis DL, Hiroe S, Horton LD, Howe HC, Isler RC, Jernigan TC, Kaneko H, Leboeuf JN, Lee DK, Lynch VE, Lyon JF, Menon MM, Morris RN, Murakami M, Neilson GH, Paré VK, Rasmussen DA, Thomas CE, Uckan T, Wade MR, Wilgen JB, Wing WR. Second stability in the ATF torsatron—Experiment and theory. ACTA ACUST UNITED AC 1990. [DOI: 10.1063/1.859555] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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