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Combs SK, Baylor LR, Fehling DT, Fisher PW, Foust CR, Rasmussen DA, Wilgen JB, Chapman BE, Oliva SP, Prager SC, Sarff JS, Wyman MD, Brower DL, Ding WX, Terry SD, Deng BH. New ORNL Pellet Injection System and Installation/Initial Operations on MST. Fusion Science and Technology 2017. [DOI: 10.13182/fst03-a388] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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)
- S. K. Combs
- Oak Ridge National Laboratory, P O. Box 2009 Oak Ridge, Tennessee 37831-8071
| | - L. R. Baylor
- Oak Ridge National Laboratory, P O. Box 2009 Oak Ridge, Tennessee 37831-8071
| | - D. T. Fehling
- Oak Ridge National Laboratory, P O. Box 2009 Oak Ridge, Tennessee 37831-8071
| | - P. W. Fisher
- Oak Ridge National Laboratory, P O. Box 2009 Oak Ridge, Tennessee 37831-8071
| | - C. R. Foust
- Oak Ridge National Laboratory, P O. Box 2009 Oak Ridge, Tennessee 37831-8071
| | - D. A. Rasmussen
- Oak Ridge National Laboratory, P O. Box 2009 Oak Ridge, Tennessee 37831-8071
| | - J. B. Wilgen
- Oak Ridge National Laboratory, P O. Box 2009 Oak Ridge, Tennessee 37831-8071
| | - B. E. Chapman
- Department of Physics University of Wisconsin-Madison Madison, Wisconsin 53706
| | - S. P. Oliva
- Department of Physics University of Wisconsin-Madison Madison, Wisconsin 53706
| | - S. C. Prager
- Department of Physics University of Wisconsin-Madison Madison, Wisconsin 53706
| | - J. S. Sarff
- Department of Physics University of Wisconsin-Madison Madison, Wisconsin 53706
| | - M. D. Wyman
- Department of Physics University of Wisconsin-Madison Madison, Wisconsin 53706
| | - D. L. Brower
- Electrical Engineering Department University of California-Los Angeles Los Angeles, California 90095
| | - W. X. Ding
- Electrical Engineering Department University of California-Los Angeles Los Angeles, California 90095
| | - S. D. Terry
- Electrical Engineering Department University of California-Los Angeles Los Angeles, California 90095
| | - B. H. Deng
- Electrical Engineering Department University of California-Los Angeles Los Angeles, California 90095
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2
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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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Swain DW, Carter MD, Wilson JR, Ryan PM, Wilgen JB, Hosea J, Rosenberg A. Loading and Asymmetry Measurements and Modeling for the National Spherical Torus Experiment Ion Cyclotron Range of Frequencies System. Fusion Science and Technology 2017. [DOI: 10.13182/fst03-a297] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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)
- D. W. Swain
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8071
| | - M. D. Carter
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8071
| | - J. R. Wilson
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08544
| | - P. M. Ryan
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8071
| | - J. B. Wilgen
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8071
| | - J. Hosea
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08544
| | - A. Rosenberg
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08544
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Caughman JBO, Fernández Á, Cappa Á, Castejón F, Garcia-Regaña JM, Rasmussen DA, Wilgen JB. Initial Electron Bernstein Wave Emission Measurements on the TJ-II Stellarator. Fusion Science and Technology 2017. [DOI: 10.13182/fst10-a9267] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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)
| | - Á. Fernández
- Laboratorio Nacional de Fusión, EURATOM-CIEMAT, Madrid, Spain
| | - Á. Cappa
- Laboratorio Nacional de Fusión, EURATOM-CIEMAT, Madrid, Spain
| | - F. Castejón
- Laboratorio Nacional de Fusión, EURATOM-CIEMAT, Madrid, Spain
| | | | | | - J. B. Wilgen
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
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Baylor L, Barbier CC, Carmichael JR, Combs SK, Ericson MN, Bull Ezell ND, Fisher PW, Lyttle MS, Meitner SJ, Rasmussen DA, Smith SF, Wilgen JB, Maruyama S, Kiss G. Disruption Mitigation System Developments and Design for ITER. Fusion Science and Technology 2017. [DOI: 10.13182/fst14-926] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [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)
- L.R. Baylor
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | | | | | - S. K. Combs
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | | | | | - P. W. Fisher
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - M. S. Lyttle
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | | | | | - S. F. Smith
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - J. B. Wilgen
- Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - S. Maruyama
- ITER Organization, Route de Vinon sur Verdon, 13115 Saint Paul lez Durance, France
| | - G. Kiss
- ITER Organization, Route de Vinon sur Verdon, 13115 Saint Paul lez Durance, France
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Lau C, Wilgen JB, Caughman JB, Hanson GR, Hosea J, Perkins R, Ryan PM, Taylor G. Using X-mode L, R and O-mode reflectometry cutoffs to measure scrape-off-layer density profiles for upgraded ORNL reflectometer on NSTX-U. Rev Sci Instrum 2014; 85:11D815. [PMID: 25430228 DOI: 10.1063/1.4889739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The pre-existing ORNL scrape-off-layer (SOL) reflectometer that operated with the X-mode R-cutoff at 6-27 GHz to measure SOL density profiles on NSTX is being upgraded to be functional at the increased magnetic fields on NSTX-U spherical tokamak. Rather than increasing the operating frequencies to measure the higher X-mode R-cutoff frequencies on NSTX-U, it will be shown that the combined use of the X-mode R, L and O-mode cutoffs at 6-27 GHz can obtain the desired SOL density profiles. The potential capabilities and obstacles of this technique to measure SOL density profiles and possibly SOL magnetic field profiles on NSTX-U will be discussed.
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Affiliation(s)
- C Lau
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - J B Wilgen
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - J B Caughman
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - G R Hanson
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - J Hosea
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - R Perkins
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - P M Ryan
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - G Taylor
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
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7
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Hanson GR, Wilgen JB, Bigelow TS, Diem SJ, Biewer TM. Analysis of the ITER low field side reflectometer transmission line system. Rev Sci Instrum 2010; 81:10D920. [PMID: 21033952 DOI: 10.1063/1.3485086] [Citation(s) in RCA: 3] [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] [Indexed: 05/30/2023]
Abstract
A critical issue in the design of the ITER low field side reflectometer is the transmission line (TL) system. A TL connects each launcher to a diagnostic instrument. Each TL will typically consist of ∼42 m of corrugated waveguide and up to ten miter bends. Important issues for the performance of the TL system are mode conversion and reflections. Minimizing these issues are critical to minimizing standing waves and phase errors. The performance of TL system is analyzed and recommendations are given.
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Affiliation(s)
- G R Hanson
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
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8
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Diem SJ, Wilgen JB, Bigelow TS, Hanson GR, Harvey RW, Smirnov AP. Optimization studies of the ITER low field side reflectometer. Rev Sci Instrum 2010; 81:10D914. [PMID: 21033946 DOI: 10.1063/1.3490026] [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: 05/30/2023]
Abstract
Microwave reflectometry will be used on ITER to measure the electron density profile, density fluctuations due to MHD/turbulence, edge localized mode (ELM) density transients, and as an L-H transition monitor. The ITER low field side reflectometer system will measure both core and edge quantities using multiple antenna arrays spanning frequency ranges of 15-155 GHz for the O-mode system and 55-220 GHz for the X-mode system. Optimization studies using the GENRAY ray-tracing code have been done for edge and core measurements. The reflectometer launchers will utilize the HE11 mode launched from circular corrugated waveguide. The launched beams are assumed to be Gaussian with a beam waist diameter of 0.643 times the waveguide diameter. Optimum launcher size and placement are investigated by computing the antenna coupling between launchers, assuming the launched and received beams have a Gaussian beam pattern.
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Affiliation(s)
- S J Diem
- Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6169, USA.
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9
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Hanson GR, Wilgen JB, Lau C, Lin Y, Wallace GM, Wukitch SJ. Scrape-off layer reflectometer for Alcator C-Mod. Rev Sci Instrum 2008; 79:10F114. [PMID: 19044598 DOI: 10.1063/1.2966460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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 two-frequency x-mode reflectometer operating from 100 to 146 GHz is deployed on Alcator C-Mod to measure the density profile and fluctuations in the scrape-off layer (SOL) immediately in front of the new J-port ICRF antenna and the new C-port lower hybrid launcher. The reflectometer covers densities from 10(16) to 10(20) m(-3) at 5-5.4 T. To provide the greatest flexibility and capability to deal with density fluctuations approaching 100% peak-to-peak in the SOL, both full-phase and differential-phase measurement capabilities with sweep speeds of approximately 10 micros to >1 ms are implemented. The differential-phase measurement uses a difference frequency of 500 MHz, corresponding to cutoff layer separations ranging from about 0.1 to 1 mm. The reflectometer has six sets of launchers: three on the ICRF antenna and three on the lower hybrid launcher. Both the ICRF antenna and the lower hybrid launcher incorporate reflectometer antennas at their top, bottom, and midplane locations.
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Affiliation(s)
- G R Hanson
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, 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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Uckan T, Hidalgo C, Bell JD, Harris JH, Dunlap JL, Wilgen JB, Ritz CP, Rhodes TL, Wootton AJ. Characteristics of edge plasma turbulence on the ATF torsatron. ACTA ACUST UNITED AC 1991. [DOI: 10.1063/1.859882] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [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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Murakami M, Carreras BA, Baylor LR, Bell GL, Bigelow TS, England AC, Glowienka JC, Howe HC, Jernigan TC, Lee DK, Lynch VE, Ma CH, Rasmussen DA, Tolliver JS, Wade MR, Wilgen JB, Wing WR. Bootstrap-current experiments in a toroidal plasma-confinement device. Phys Rev Lett 1991; 66:707-710. [PMID: 10043880 DOI: 10.1103/physrevlett.66.707] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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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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Harris JH, Murakami M, Carreras BA, Bell JD, Bell GL, Bigelow TS, Charlton LA, Dominguez N, Dunlap JL, Glowienka JC, Horton LD, Howe HC, Isler RC, Kaneko H, Kindsfather RR, Leboeuf JN, Lynch VE, Menon MM, Morris RN, Neilson GH, Paré VK, Rasmussen DA, Wilgen JB, Wing WR. Second stability in the ATF torsatron. Phys Rev Lett 1989; 63:1249-1252. [PMID: 10040514 DOI: 10.1103/physrevlett.63.1249] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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