Study of temporal pulse shape effects on W using simulations and laser heating

被引：12

作者：

Yu, J. H. ^{[1
]}

De Temmerman, G. ^{[2
]}

Doerner, R. P. ^{[1
]}

van den Berg, M. A. ^{[3
]}

机构：

[1] Univ Calif San Diego, Energy Res Ctr, La Jolla, CA 92093 USA

[2] ITER Org, Route Vinon Verdon, F-13115 St Paul Les Durance, France

[3] EURATOM, Dutch Inst Fundamental Energy Res, FOM DIFFER, Nieuwegein, Netherlands

来源：

PHYSICA SCRIPTA | 2016年 / T167卷

关键词：

ELM; tokamak; heat flux testing; laser heating; BERYLLIUM; PLASMA;

D O I：

10.1088/0031-8949/T167/1/014033

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Transient heat pulses with triangular, square, and ELM-like temporal shapes are investigated in order to further understand how transient plasma instabilities will affect plasma facing components in tokamaks. A solution to the 1D heat equation for triangular pulses allows the peak surface temperature to be written analytically for arbitrary rise times. The solution as well as ANSYS simulations reveal that a positive ramp (maximum rise time) triangular pulse has a higher peak surface temperature by a factor of 2 compared to that from a negative ramp (rise time = 0) pulse shape with equal energy density, peak power, and pulse width. Translating the results to ITER, an ELM or disruption pulse with the shortest rise time is the most benign compared to other pulse shapes with the same peak heat flux and same energy density.

引用

页数：4

共 14 条

[1]

B┬u├▒uerle D., 2013, LASER PROCESSING CHE

[2] ELM simulation experiments on Pilot-PSI using simultaneous high flux plasma and transient heat/particle source [J].

De Temmerman, G. ;

Zielinski, J. J. ;

van Diepen, S. ;

Marot, L. ;

Price, M. .

NUCLEAR FUSION, 2011, 51 (07)

[3] The influence of a beryllium containing plasma on the evolution of a mixed-material surface [J].

Doerner, R. P. ;

Baldwin, M. J. ;

Schmid, K. .

PHYSICA SCRIPTA, 2004, T111 :75-79

[4] Type-I ELM power deposition profile width and temporal shape in JET [J].

Eich, T. ;

Thomsen, H. ;

Fundamenski, W. ;

Arnoux, G. ;

Brezinsek, S. ;

Devaux, S. ;

Herrmann, A. ;

Jachmich, S. ;

Rapp, J. .

JOURNAL OF NUCLEAR MATERIALS, 2011, 415 (01) :S856-S859

[5] Investigation of the impact of transient heat loads applied by laser irradiation on ITER-grade tungsten [J].

Huber, A. ;

Arakcheev, A. ;

Sergienko, G. ;

Steudel, I. ;

Wirtz, M. ;

Burdakov, A. V. ;

Coenen, J. W. ;

Kreter, A. ;

Linke, J. ;

Mertens, Ph ;

Philipps, V. ;

Pintsuk, G. ;

Reinhart, M. ;

Samm, U. ;

Shoshin, A. ;

Schweer, B. ;

Unterberg, B. ;

Zlobinski, M. .

PHYSICA SCRIPTA, 2014, T159

[6] Sub-ms laser pulse irradiation on tungsten target damaged by exposure to helium plasma [J].

Kajita, Shin ;

Takamura, Shuichi ;

Ohno, Noriyasu ;

Nishijima, Dai ;

Iwakiri, Hirotomo ;

Yoshida, Naoaki .

NUCLEAR FUSION, 2007, 47 (09) :1358-1366

[7] Experimental study of PFCs erosion under ITER-like transient loads at plasma gun facility QSPA [J].

Klimov, N. ;

Podkovyrov, V. ;

Zhitlukhin, A. ;

Kovalenko, D. ;

Bazylev, B. ;

Janeschitz, G. ;

Landman, I. ;

Pestchanyi, S. ;

Federici, G. ;

Loarte, A. ;

Merola, M. ;

Linke, J. ;

Hirai, T. ;

Compan, J. .

JOURNAL OF NUCLEAR MATERIALS, 2009, 390-91 :721-726

[8] Performance of different tungsten grades under transient thermal loads [J].

Linke, J. ;

Loewenhoff, T. ;

Massaut, V. ;

Pintsuk, G. ;

Ritz, G. ;

Roedig, M. ;

Schmidt, A. ;

Thomser, C. ;

Uytdenhouwen, I. ;

Vasechko, V. ;

Wirtz, M. .

NUCLEAR FUSION, 2011, 51 (07)

[9] Progress on the application of ELM control schemes to ITER scenarios from the non-active phase to DT operation [J].

Loarte, A. ;

Huijsmans, G. ;

Futatani, S. ;

Baylor, L. R. ;

Evans, T. E. ;

Orlov, D. M. ;

Schmitz, O. ;

Becoulet, M. ;

Cahyna, P. ;

Gribov, Y. ;

Kavin, A. ;

Naik, A. Sashala ;

Campbell, D. J. ;

Casper, T. ;

Daly, E. ;

Frerichs, H. ;

Kischner, A. ;

Laengner, R. ;

Lisgo, S. ;

Pitts, R. A. ;

Saibene, G. ;

Wingen, A. .

NUCLEAR FUSION, 2014, 54 (03)

[10] Evolution of tungsten degradation under combined high cycle edge-localized mode and steady-state heat loads [J].

Loewenhoff, Th ;

Buerger, A. ;

Linke, J. ;

Pintsuk, G. ;

Schmidt, A. ;

Singheiser, L. ;

Thomser, C. .

PHYSICA SCRIPTA, 2011, T145

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