A new experimental classification of divertor detachment in ASDEX Upgrade

被引：131
|
作者：
Potzel, S. [1 ]
Wischmeier, M. [1 ]
Bernert, M. [1 ]
Dux, R. [1 ]
Mueller, H. W. [1 ]
Scarabosio, A. [1 ]
机构：
[1] Max Planck Inst Plasma Phys, EURATOM Assoc, D-85748 Garching, Germany
来源：
NUCLEAR FUSION | 2014年 / 54卷 / 01期
关键词：
SCRAPE-OFF LAYER; PLASMA PARAMETERS; TOROIDAL FIELD; DENSITY LIMIT; DIII-D; PHYSICS; ITER; EDGE; PERFORMANCE; CONVECTION;
D O I：
10.1088/0029-5515/54/1/013001
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
In this paper, a new experimental classification of divertor detachment in ASDEX Upgrade is presented. For this purpose, a series of ohmic and L-mode density ramp discharges at different heating powers, magnetic field directions and plasma species were carried out. For the first time at ASDEX Upgrade the electron density in the divertor volume and the occurrence of volume recombination were measured by means of spectroscopy. It is shown that detachment is not a continuously evolving process but rather undergoes three distinct states while the characteristics of the inner and outer divertor are strongly coupled. Before the complete detachment of the inner and outer divertor, radiative fluctuations occur in the inner divertor close to the X-point, observed for the first time via new fast diode bolometers. Finally, the effect of an externally applied magnetic perturbation field on the detachment process is investigated.
引用
收藏
页数：19
相关论文
共 50 条
  • [31] Closed divertor operation in ASDEX Upgrade and JET
    Kallenbach, A
    Coster, D
    Fuchs, JC
    Guo, HY
    Haas, G
    Herrmann, A
    Horton, LD
    Ingesson, LC
    Maggi, CF
    Matthews, GF
    Monk, RD
    Neuhauser, J
    Ryter, F
    Schweinzer, J
    Stober, J
    Suttrop, W
    PLASMA PHYSICS AND CONTROLLED FUSION, 1999, 41 : B177 - B189
  • [32] Plasma profiles in the inner divertor of ASDEX Upgrade
    Carlson, A
    Coster, D
    Herrmann, A
    Pugno, R
    Wenzel, U
    JOURNAL OF NUCLEAR MATERIALS, 2001, 290 : 575 - 578
  • [33] EXPERIMENTAL INVESTIGATIONS OF HIGH-Z MATERIALS IN THE ASDEX-UPGRADE DIVERTOR
    ROTH, J
    NAUJOKS, D
    KRIEGER, K
    FIELD, A
    LIEDER, G
    HIRSCH, S
    JOURNAL OF NUCLEAR MATERIALS, 1995, 220 : 231 - 234
  • [34] First experimental determination of ion flow velocities and temperatures in the ASDEX Upgrade divertor
    Gafert, J
    Behringer, K
    Coster, D
    Dorn, C
    Hirsch, K
    Niethammer, M
    Schumacher, U
    PLASMA PHYSICS AND CONTROLLED FUSION, 1997, 39 (12) : 1981 - 1995
  • [35] The ASDEX Upgrade divertor IIb -: a closed divertor for strongly shaped plasmas
    Neu, R
    Fuchs, JC
    Kallenbach, A
    Maggi, C
    Rohde, V
    Ryter, F
    Eich, T
    Gafert, J
    Gruber, O
    Haas, G
    Herrmann, A
    Kaufmann, M
    Laux, M
    Mertens, V
    Müller, HW
    Neuhauser, J
    Pütterich, T
    Stober, J
    Yoon, SW
    NUCLEAR FUSION, 2003, 43 (10) : 1191 - 1196
  • [36] Comparison of reduced model predictions for divertor detachment onset and reattachment timescales in ASDEX Upgrade and JET experiments
    Henderson, S. S.
    Bernert, M.
    Brida, D.
    Cavedon, M.
    David, P.
    Dux, R.
    Fevrier, O.
    Jacquet, P.
    Jarvinen, A.
    Kallenbach, A.
    Karhunen, J.
    Kirov, K.
    Komm, M.
    Lennholm, M.
    Lomanowski, B.
    Lowry, C.
    McDermott, R.
    Meigs, A.
    Reimerdes, H.
    Sun, H.
    Thomas, B.
    NUCLEAR FUSION, 2024, 64 (06)
  • [37] Study of detachment in future ASDEX Upgrade alternative divertor configurations by means of EMC3-EIRENE
    Lunt, T.
    Bernert, M.
    Brida, D.
    Cavedon, M.
    David, P.
    Faitsch, M.
    Feng, Y.
    Griener, M.
    Herrmann, A.
    Kurzan, B.
    Pan, O.
    Plank, U.
    Silvagni, D.
    Teschke, M.
    Willensdorfer, M.
    Wischmeier, M.
    Wolfrum, E.
    Zammuto, I.
    Nuclear Materials and Energy, 2021, 26
  • [38] Study of detachment in future ASDEX Upgrade alternative divertor configurations by means of EMC3-EIRENE
    Lunt, T.
    Bernert, M.
    Brida, D.
    Cavedon, M.
    David, P.
    Faitsch, M.
    Feng, Y.
    Griener, M.
    Herrmann, A.
    Kurzan, B.
    Pan, O.
    Plank, U.
    Silvagni, D.
    Teschke, M.
    Willensdorfer, M.
    Wischmeier, M.
    Wolfrum, E.
    Zammuto, I
    NUCLEAR MATERIALS AND ENERGY, 2021, 26
  • [39] Design and operation of the in-vessel cryopump for the new upper divertor in ASDEX Upgrade
    Schall, G.
    Berger, N.
    Boesser, D.
    Herrmann, A.
    Rohde, V
    Sochor, M.
    Weissgerber, M.
    FUSION ENGINEERING AND DESIGN, 2021, 166
  • [40] Characterization of the fluctuating detachment state in ASDEX Upgrade
    Potzel, S.
    Wischmeier, M.
    Bernert, M.
    Dux, R.
    Mueller, H. W.
    Scarabosio, A.
    JOURNAL OF NUCLEAR MATERIALS, 2013, 438 : S285 - S290
12345