Hot Vertical-Displacement-Event Process due to Internal Energy Perturbations for HL-2M Tokamak Plasma

doi:10.1088/0256-307X/33/5/055201

Chin. Phys. Lett.

2016, Vol. 33

Issue (05): 055201 DOI: 10.1088/0256-307X/33/5/055201

PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES

Hot Vertical-Displacement-Event Process due to Internal Energy Perturbations for HL-2M Tokamak Plasma

Lei Xue^1**, Xu-Ru Duan¹, Guo-Yao Zheng¹, Yue-Qiang Liu^2,1, Shi-Lei Yan¹, V. N. Dokuka³, V. E. Lukash^4,5, R. R. Khayrutdinov^4,5

¹Southwestern Institute of Physics, Chengdu 610041
²CCFE, Culham Science Centre, Abingdon OX14 3DB, United Kingdom
³TRINITI, Troitsk, Russia
⁴NRC Kurchatov Institute, Moscow, Russia
⁵National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Moscow, Russia

Cite this article:

Lei Xue, Xu-Ru Duan, Guo-Yao Zheng et al 2016 Chin. Phys. Lett. 33 055201

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Abstract During the tokamak operation, variation of the stored energy can cause internal perturbations of the plasma. These perturbations may develop into large-scale vertical movement of the whole column for the vertically elongated tokamak, eventually generating the hot vertical displacement event (VDE). It will cause considerable damage to the machine. In this work, the hot VDE process due to stored energy perturbations is investigated by a mature non-linear time-evolution code DINA. The influence on the vertical instability, the displacement direction and the electromagnetic loads on in-vessel components during the hot VDE are analyzed. It is shown that a larger perturbation leads to faster development of the vertical instability. Meanwhile the variation of the Shafranov shift, due to the energy change, is related to the VDE direction. The vertical electromagnetic force on the vacuum vessel and the halo current flowing in the divertor baffle become larger in the case of VDE moving towards the $X$ point.

Received: 06 January 2016 Published: 31 May 2016

PACS:	52.55.Dy	(General theory and basic studies of plasma lifetime, particle and heat loss, energy balance, field structure, etc.)
	52.55.Fa	(Tokamaks, spherical tokamaks)
	52.55.Rk	(Power exhaust; divertors)

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https://cpl.iphy.ac.cn/10.1088/0256-307X/33/5/055201 OR https://cpl.iphy.ac.cn/Y2016/V33/I05/055201

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Articles by authors
	Lei Xue
	Xu-Ru Duan
	Guo-Yao Zheng
	Yue-Qiang Liu
	Shi-Lei Yan
	V. N. Dokuka
	V. E. Lukash
	R. R. Khayrutdinov

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