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Yan L, Ji X, Song S, Xia F, Xu Y, Ye J, Jiang M, Chen W, Sun T, Liang S, Ling F, Ma R, Huang M, Qu H, Song X, Yu D, Shi Z, Liu Y, Yang Q, Xu M, Duan X, Liu Y. Control system of neoclassical tearing modes in real time on HL-2A tokamak. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2017; 88:113504. [PMID: 29195413 DOI: 10.1063/1.5002590] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The stability and performance of tokamak plasmas are routinely limited by various magneto-hydrodynamic instabilities, such as neoclassical tearing modes (NTMs). This paper presents a rather simple method to control the NTMs in real time (RT) on a tokamak, including the control principle of a feedback approach for RT suppression and stabilization for the NTMs. The control system combines Mirnov, electron cyclotron emission, and soft X-ray diagnostics used for determining the NTM positions. A methodology for fast detection of 2/1 or 3/2 NTM positions with 129 × 129 grid reconstruction is elucidated. The forty poloidal angles for steering the electron cyclotron resonance heating (ECRH)/electron cyclotron current drive launcher are used to establish the alignment of antenna mirrors with the center of the NTM and to ensure launcher emission intersecting with the rational surface of a magnetic island. Pilot experiments demonstrate the RT control capability to trace the conventional tearing modes (CTMs) in the HL-2A tokamak. The 2/1 CTMs have been suppressed or stabilized by the ECRH power deposition on site or with the steerable launcher.
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Affiliation(s)
- Longwen Yan
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Xiaoquan Ji
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Shaodong Song
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Fan Xia
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Yuan Xu
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Jiruo Ye
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Min Jiang
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Wenjin Chen
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Tengfei Sun
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Shaoyong Liang
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Fei Ling
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Rui Ma
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Mei Huang
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Hongpeng Qu
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Xianming Song
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Deliang Yu
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Zhongbin Shi
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Yi Liu
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Qingwei Yang
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Min Xu
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Xuru Duan
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
| | - Yong Liu
- Southwestern Institute of Physics, Chengdu, Sichuan 610225, China
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Wagner D, Schmid-Lorch D, Stober J, Höhnle H, Leuterer F, Poli E, Monaco F, Münich M, Schütz H. Feed Forward Polarization Control During ECRH Discharges at ASDEX Upgrade. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst10-a10890] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Dietmar Wagner
- Max-Plank-Institut für Plasmaphysik, EURATOM-IPP, Boltzmannstr.2, D-85748 Garching, Germany
| | - Dominik Schmid-Lorch
- Max-Plank-Institut für Plasmaphysik, EURATOM-IPP, Boltzmannstr.2, D-85748 Garching, Germany
| | - Jörg Stober
- Max-Plank-Institut für Plasmaphysik, EURATOM-IPP, Boltzmannstr.2, D-85748 Garching, Germany
| | - Hendrik Höhnle
- Institut für Plasmaforschung, Universität Stuttgart, D-70569 Stuttgart, Germany
| | - Fritz Leuterer
- Max-Plank-Institut für Plasmaphysik, EURATOM-IPP, Boltzmannstr.2, D-85748 Garching, Germany
| | - Emanuele Poli
- Max-Plank-Institut für Plasmaphysik, EURATOM-IPP, Boltzmannstr.2, D-85748 Garching, Germany
| | - Francesco Monaco
- Max-Plank-Institut für Plasmaphysik, EURATOM-IPP, Boltzmannstr.2, D-85748 Garching, Germany
| | - Max Münich
- Max-Plank-Institut für Plasmaphysik, EURATOM-IPP, Boltzmannstr.2, D-85748 Garching, Germany
| | - Harald Schütz
- Max-Plank-Institut für Plasmaphysik, EURATOM-IPP, Boltzmannstr.2, D-85748 Garching, Germany
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Hicks NK, Suttrop W, Behler K, García-Muñoz M, Giannone L, Maraschek M, Raupp G, Reich M, Sips ACC, Stober J, Treutterer W, Volpe F, Cirant S, D’Antona G. Fast Sampling Upgrade and Real-Time NTM Control Application of the ECE Radiometer on ASDEX Upgrade. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst57-1-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- N. K. Hicks
- Max Planck Institut für Plasmaphysik EURATOM Association, 85748 Garching, Germany
| | - W. Suttrop
- Max Planck Institut für Plasmaphysik EURATOM Association, 85748 Garching, Germany
| | - K. Behler
- Max Planck Institut für Plasmaphysik EURATOM Association, 85748 Garching, Germany
| | - M. García-Muñoz
- Max Planck Institut für Plasmaphysik EURATOM Association, 85748 Garching, Germany
| | - L. Giannone
- Max Planck Institut für Plasmaphysik EURATOM Association, 85748 Garching, Germany
| | - M. Maraschek
- Max Planck Institut für Plasmaphysik EURATOM Association, 85748 Garching, Germany
| | - G. Raupp
- Max Planck Institut für Plasmaphysik EURATOM Association, 85748 Garching, Germany
| | - M. Reich
- Max Planck Institut für Plasmaphysik EURATOM Association, 85748 Garching, Germany
| | - A. C. C. Sips
- Max Planck Institut für Plasmaphysik EURATOM Association, 85748 Garching, Germany
| | - J. Stober
- Max Planck Institut für Plasmaphysik EURATOM Association, 85748 Garching, Germany
| | - W. Treutterer
- Max Planck Institut für Plasmaphysik EURATOM Association, 85748 Garching, Germany
| | - F. Volpe
- Max Planck Institut für Plasmaphysik EURATOM Association, 85748 Garching, Germany
| | - S. Cirant
- Istituto di Fisica del Plasma Associazione EURATOM-ENEA-CNR, 20125 Milano, Italy
| | - G. D’Antona
- Politecnico di Milano, Dip. di Elettrotecnica P.za L. da Vinci 32, 20133 Milano, Italy
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4
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Bongers WA, Goede APH, Westerhof E, Oosterbeek JW, Doelman NJ, SchÜller FC, de Baar MR, Kasparek W, Wubie W, Wagner D, Stober J. Magnetic Island Localization for NTM Control by ECE Viewed Along the Same Optical Path of the ECCD Beam. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst09-a4071] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- W. A. Bongers
- aFOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, PO Box 1207, 3430 BE Nieuwegein, The Netherlands
| | - A. P. H. Goede
- aFOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, PO Box 1207, 3430 BE Nieuwegein, The Netherlands
| | - E. Westerhof
- aFOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, PO Box 1207, 3430 BE Nieuwegein, The Netherlands
| | - J. W. Oosterbeek
- bInstitut für Energieforschung—Plasmaphysik, Forschungszentrum Jülich, Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Jülich, Germany
| | - N. J. Doelman
- cTNO-Institute, Stieltjesweg 1, PO Box 155, 2600 AD Delft, The Netherlands
| | - F. C. SchÜller
- aFOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, PO Box 1207, 3430 BE Nieuwegein, The Netherlands
| | - M. R. de Baar
- aFOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, PO Box 1207, 3430 BE Nieuwegein, The Netherlands
| | - W. Kasparek
- dInstitut für Plasmaforschung, Universität Stuttgart, Pfaffenwaldring 31, 70569 Stuttgart, Germany
| | - W. Wubie
- dInstitut für Plasmaforschung, Universität Stuttgart, Pfaffenwaldring 31, 70569 Stuttgart, Germany
| | - D. Wagner
- eMax Planck Institut für Plasmaphysik, Association EURATOM-IPP, D-85748 Garching, Germany
| | - J. Stober
- eMax Planck Institut für Plasmaphysik, Association EURATOM-IPP, D-85748 Garching, Germany
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Xia D, Huang M, Song S, Chen G, Wang J, Zhou J, Rao J, Zhuang G. Coupling of electron cyclotron waves to the desired mode in plasma of HL-2A tokamak. FUSION ENGINEERING AND DESIGN 2013. [DOI: 10.1016/j.fusengdes.2013.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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6
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Kalman filters for real-time magnetic island phase tracking. FUSION ENGINEERING AND DESIGN 2013. [DOI: 10.1016/j.fusengdes.2013.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Westerhof E, Nielsen SK, Oosterbeek JW, Salewski M, De Baar MR, Bongers WA, Bürger A, Hennen BA, Korsholm SB, Leipold F, Moseev D, Stejner M, Thoen DJ. Strong scattering of high power millimeter waves in tokamak plasmas with tearing modes. PHYSICAL REVIEW LETTERS 2009; 103:125001. [PMID: 19792443 DOI: 10.1103/physrevlett.103.125001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2009] [Indexed: 05/28/2023]
Abstract
In tokamak plasmas with a tearing mode, strong scattering of high power millimeter waves, as used for heating and noninductive current drive, is shown to occur. This new wave scattering phenomenon is shown to be related to the passage of the O point of a magnetic island through the high power heating beam. The density determines the detailed phasing of the scattered radiation relative to the O-point passage. The scattering power depends strongly nonlinearly on the heating beam power.
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Affiliation(s)
- E Westerhof
- FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM Trilateral Euregio Cluster, Nieuwegein, The Netherlands
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Raupp G, Behler K, Blank H, Buhler A, Drube R, Eixenberger H, Engelhardt K, Fuchs C, Kollotzek H, Lohs A, Merkel R, Neu G, Schramm G, Treutterer W, Zasche D, Zehetbauer T. ASDEX Upgrade CODAC overview. FUSION ENGINEERING AND DESIGN 2009. [DOI: 10.1016/j.fusengdes.2009.01.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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A closed-loop control system for stabilization of MHD events on TEXTOR. FUSION ENGINEERING AND DESIGN 2009. [DOI: 10.1016/j.fusengdes.2009.01.036] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Treutterer W, Giannone L, Lüddecke K, Neu G, Raupp G, Zasche D, Zehetbauer T. Real-time diagnostic integration with the ASDEX upgrade control system. FUSION ENGINEERING AND DESIGN 2009. [DOI: 10.1016/j.fusengdes.2008.12.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Treutterer W, Behler K, Giannone L, Hicks N, Manini A, Maraschek M, Raupp G, Reich M, Sips A, Stober J, Suttrop W. Real-time diagnostics at ASDEX Upgrade—Integration with MHD feedback control. FUSION ENGINEERING AND DESIGN 2008. [DOI: 10.1016/j.fusengdes.2007.09.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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