Pellet fueling experiments in Wendelstein 7-X

被引：35

作者：

Baldzuhn, J. ^{[1
]}

Damm, H. ^{[1
]}

Beidler, C. D. ^{[1
]}

McCarthy, K. ^{[2
]}

Panadero, N. ^{[2
]}

Biedermann, C. ^{[1
]}

Bozhenkov, S. A. ^{[1
]}

Brunner, K. J. ^{[1
]}

Fuchert, G. ^{[1
]}

Kazakov, Y. ^{[3
]}

Beurskensl, M. ^{[1
]}

Dibon, M. ^{[4
]}

Geiger, J. ^{[1
]}

Grulke, O. ^{[1
]}

Hoefel, U. ^{[1
]}

Klinger, T. ^{[1
]}

Koechl, F. ^{[5
]}

Knauer, J. ^{[1
]}

Kocsis, G. ^{[6
]}

Kornejew, P. ^{[1
]}

Lang, P. T. ^{[4
]}

Langenberg, A. ^{[1
]}

Laqua, H. ^{[1
]}

Pablant, N. A. ^{[7
]}

Pasch, E. ^{[1
]}

Pedersen, T. S. ^{[1
]}

Ploeckl, B. ^{[4
]}

Rahbarnia, K. ^{[1
]}

Schlisio, G. ^{[1
]}

Scott, E. R. ^{[1
]}

Stange, T. ^{[1
]}

von Stechow, A. ^{[1
]}

Szepesi, T. ^{[6
]}

Turkin, Y. ^{[1
]}

Wagner, F. ^{[1
]}

Winters, V ^{[8
]}

Wurden, G. ^{[9
]}

Zhang, D. ^{[1
]}

机构：

[1] Max Planck Inst Plasma Phys, IPP, D-17491 Greifswald, Germany

[2] CIEMAT, Lab Nacl Fus, Madrid, Spain

[3] KMS, LPP ERM, Brussels, Belgium

[4] Max Planck Inst Plasma Phys, IPP, D-85748 Garching, Germany

[5] Atominst TU Wien, Assoc EURATOM O AW ATI, A-1020 Vienna, Austria

[6] Wigner Res Ctr Physiks, H-1121 Budapest 12, Hungary

[7] Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA

[8] Univ Wisconsin, Madison, WI 53706 USA

[9] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2019年 / 61卷 / 09期

关键词：

ice pellet injection; central particle fueling; particle transport in an advanced stellarator; INJECTION;

D O I：

10.1088/1361-6587/ab3567

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：

During the two most recent experimental campaigns in the advanced stellarator Wendelstein 7-X (W7-X) (Klinger et al 2017 Plasma Phys. Control. Fusion 59 014018; Bosch et al 2017 Nucl. Fusion 57 116015; Wolf et al 2017 Nucl. Fusion 57 102020; Pedersen et al 2017 Phys. Plasmas 24 0555030) hydrogen ice pellet injection was performed for the first time. In order to investigate the potential of pellet fueling in W7-X and to study the particle deposition in a large stellarator, a blower-gun system was installed with 40 pellets capability. The experience gained with this system will be used for the specification of a future steady-state pellet injector system. One important motivation for a pellet injector (Dibon 2014 Master-Thesis Technical University Munich, Max-Planck Institut IPP) on W7-X is the mitigation of hollow density profiles expected in case of predominant neoclassical transport. For long-pulse operation of up to 30 min, only electron cyclotron resonance heating is available on W7-X. Hence, pellet injection will be the only source for deep particle fueling. Deep particle fueling by pellets in tokamaks is supported by a grad-B drift, if the pellets are injected from the magnetic high-field-side. This approach was tested in W7-X, as well. The injection of series of pellets was also tested. Here, deep fueling is supported for later pellets in the series by the plasma cooling following the initial pellets in the same series. As in earlier experiments in the heliotron LHD (Takeiri et al 2017 Nucl. Fusion 57 102023), deep and rapid fueling could be achieved successfully in W7-X.

引用

页数：16

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