Tomographic reconstruction of two-dimensional radiated power distribution during impurity injection in KSTAR plasmas using an infrared imaging video bolometer

被引：22
作者：
Jang, Juhyeok [1 ,2 ]
Choe, Wonho [1 ,2 ,3 ]
Peterson, B. J. [4 ]
Seo, D. C. [5 ]
Mukai, K. [4 ]
Sano, R. [6 ]
Oh, S. [5 ]
Hong, S. H. [5 ]
Hong, Joohwan [1 ,2 ]
Lee, H. Y. [1 ,2 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Phys, 291 Daehak Ro, Daejeon 34141, South Korea
[2] Impur & Edge Plasma Res Ctr, 291 Daehak Ro, Daejeon 34141, South Korea
[3] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, 291 Daehak Ro, Daejeon 34141, South Korea
[4] Natl Inst Fus Sci, 322-6 Oroshi Cho, Toki, Gifu 5095292, Japan
[5] Natl Fus Res Inst, 169-148 Gwahak Ro, Daejeon 34133, South Korea
[6] Natl Inst Quantum & Radiol Sci & Technol, Naka, Ibaraki 3110193, Japan
来源：
CURRENT APPLIED PHYSICS | 2018年 / 18卷 / 04期
基金：
新加坡国家研究基金会;
关键词：
Tokamak; Radiation; KSTAR; Bolometer; Tomography; Impurities; DIVERTOR; JET; TOKAMAK; JT-60U;
D O I：
10.1016/j.cap.2018.01.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Based on the two-dimensional radiation images obtained by an infrared imaging video bolometer (IRVB) with tangential view, the two dimensional radiation profiles of plasmas in KSTAR were reconstructed. The IRVB installed on KSTAR has a tangential view of the plasma, and thus tomographic reconstruction of the raw images of radiation profiles was performed to remove the chord-integration effect by using a tomographic reconstruction code based on the Phillips-Tikhonov algorithm. Phantom reconstruction tests with various synthetic images were carried out to validate the accuracy of the reconstruction results. It is found that hollow radiation phantoms with strong divertor radiation were reconstructed with high accuracy. Furthermore, the effects of the number of channels of the IR camera, and the number of pixels of the plasma and of the IRVB on reconstruction performance are studied with phantom tests. Two-dimensionally reconstructed images of KSTAR plasmas demonstrated that radiation loss at the plasma edge and near the divertor region increased significantly after gaseous impurity injection. The total radiated power was up to 1.2 MW at the disruption, which was 40% of the NBI power. After argon and krypton gas injection, total radiated power was increased by 325 kW and 180 kW, respectively. (c) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：461 / 468
页数：8
相关论文
共 26 条
  • [1] [Anonymous], 2007, PLASMA FUSION RES
  • [2] Bogatu I. N., 2001, Review of Scientific Instruments, V72, DOI 10.1063/1.1326018
  • [3] Study of impurity behaviour during JET radiative boundary experiments
    Chen, H
    Giannella, R
    Hawkes, NC
    Lauro-Taroni, L
    Peacock, NJ
    von Hellermann, M
    [J]. PLASMA PHYSICS AND CONTROLLED FUSION, 2001, 43 (01) : 1 - 12
  • [4] Radiation distribution and energy loss during ELM in EAST
    Duan, Y. M.
    Hu, L. Q.
    Chen, K. Y.
    Du, W.
    Zhang, L.
    [J]. JOURNAL OF NUCLEAR MATERIALS, 2013, 438 : S338 - S341
  • [5] Confinement properties of high density impurity seeded ELMy H-mode discharges at low and high triangularity on JET
    Dumortier, P
    Andrew, P
    Bonheure, G
    Budny, RV
    Buttery, R
    Charlet, M
    Coffey, I
    de Baar, M
    de Vries, PC
    Eich, T
    Hillis, D
    Ingesson, C
    Jachmich, S
    Jackson, G
    Kallenbach, A
    Koslowski, HR
    Lawson, KD
    Liu, C
    Maddison, G
    Messiaen, AM
    Monier-Garbet, P
    Murakami, M
    Nave, MFF
    Ongena, J
    Parail, V
    Puiatti, ME
    Rapp, J
    Sartori, F
    Stamp, M
    Strachan, JD
    Suttrop, W
    Telesca, G
    Tokar, M
    Unterberg, B
    Valisa, M
    von Hellermann, M
    Weyssow, B
    [J]. PLASMA PHYSICS AND CONTROLLED FUSION, 2002, 44 (09) : 1845 - 1861
  • [6] Two-dimensional AXUV-based radiated power density diagnostics on NSTX-U
    Faust, I.
    Delgado-Aparicio, L.
    Bell, R. E.
    Tritz, K.
    Diallo, A.
    Gerhardt, S. P.
    LeBlanc, B.
    Kozub, T. A.
    Parker, R. R.
    Stratton, B. C.
    [J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 2014, 85 (11)
  • [7] Fast bolometric measurements on the TCV tokamak
    Furno, I
    Weisen, H
    Mlynar, J
    Pitts, RA
    Llobet, X
    Marmillod, P
    Pochon, GP
    [J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 1999, 70 (12) : 4552 - 4556
  • [8] Minimum Fisher regularization of image reconstruction for infrared imaging bolometer on HL-2A
    Gao, J. M.
    Liu, Y.
    Li, W.
    Lu, J.
    Dong, Y. B.
    Xia, Z. W.
    Yi, P.
    Yang, Q. W.
    [J]. REVIEW OF SCIENTIFIC INSTRUMENTS, 2013, 84 (09)
  • [9] POWER BALANCE AND SCALING OF THE RADIATED POWER IN THE DIVERTOR AND MAIN PLASMA OF ALCATOR C-MOD
    GOETZ, JA
    LIPSCHULTZ, B
    GRAF, MA
    KURZ, C
    NACHTRIEB, R
    SNIPES, JA
    TERRY, JL
    [J]. JOURNAL OF NUCLEAR MATERIALS, 1995, 220 : 971 - 975
  • [10] Improved radiation measurements on JET - First results from an upgraded bolometer system
    Huber, A.
    McCormick, K.
    Andrew, P.
    de Baar, M. R.
    Beaumont, P.
    Dalley, S.
    Fink, J.
    Fuchs, J. C.
    Fullard, K.
    Fundamenski, W.
    Ingesson, L. C.
    Kirnev, G.
    Lomas, P.
    Mast, F.
    Jachmich, S.
    Matthews, G. F.
    Mertens, Ph.
    Meigs, A.
    Philipps, V.
    Rapp, J.
    Saibene, G.
    Sanders, S.
    Sartori, R.
    Stamp, M. F.
    Zeidner, W.
    [J]. JOURNAL OF NUCLEAR MATERIALS, 2007, 363 (365-370) : 365 - 370
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