Preliminary Experimental Results of ac Operation in the CT-6B Tokamak

Yang, Xiaomin; Shaobai, Zheng; Jiang, Diming; Han, Guangbing; Chi, Feng; Qi, Xin; Wenshu, Wang; Zan-Liang, Li; Li-Fang, Dong

doi:10.1088/0256-307x/12/6/013

Chinese Phys. Lett.

1995

DOI: 10.1088/0256-307x/12/6/013

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Preliminary Experimental Results of ac Operation in the CT-6B Tokamak

Xiaomin Yang

Zheng Shaobai

Diming Jiang

et al.

Abstract: The preliminary experimental results o f ac plasma discharges in the CT-6B tokamak.have been achieved by an active plasma current feedback system and the keys to a smooth transition through current zero and some phenomena related to the current reversal phase are also presented.

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Cited by 4 publications

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Alternating current operation with multicycles in the CT-6B tokamak

Yang¹,

Jiang²,

Han³

et al. 1996

Nucl. Fusion

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Stable and clean AC tokamak discharges with two, four and eight cycles of alternating plasma current have been achieved in the CT-6B tokamak. Although there are differences in the plasma-wall interactions in the two halves of each AC cycle, the purity of the plasma is not significantly affected. The finite electron densities during the current reversal phases of each cycle are attributed to a non-zero particle confinement time even at zero current. The plasma parameters in the boundary region during the AC operations were measured by a triple probe system.

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Alternating current operation with multicycles in the CT-6B tokamak

Yang¹,

Jiang²,

Han³

et al. 1996

Nucl. Fusion

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Plasma Current Profile During Current Reversal in a Tokamak

Huang¹,

Yang²,

Shaobai³

et al. 1999

Chinese Phys. Lett.

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Alternating current operation with one full cycle and a current level of 2.5 k A have been achieved in the CT-6B tokamak. The poloidal magnetic field in the plasma is measured with two internal magnetic probes in repeated discharges. The current distribution is reconstructed with an inversion algorithm. The inversed current first appears on the weak field side. The existence of magnetic surfaces and rotational transform provide particle confinement in the current reversal phase.

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Study of the DEF Feedback Control System in AC Operation of Superconducting Tokamak

Wang

Luo

Qin

et al. 2007

Plasma Sci. Technol.

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AC operation with multiple full cycles has been successfully performed on the superconducting tokamak HT-7. In the experiment, it was discovered that the saturation of the transformer magnetic flux with DEF, a signal name, was one of key aspects that affected the AC operation. The conditions of DEF were examined through the DEF feedback control system. By controlling the working patterns of the subsystems, namely the poloidal field control system and density control system, it was guaranteed that DEF would remain in the non-saturated status.

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Preliminary Experimental Results of ac Operation in the CT-6B Tokamak

Abstract: The preliminary experimental results o f ac plasma discharges in the CT-6B tokamak.have been achieved by an active plasma current feedback system and the keys to a smooth transition through current zero and some phenomena related to the current reversal phase are also presented.

Cited by 4 publications

References 5 publications

Alternating current operation with multicycles in the CT-6B tokamak

Alternating current operation with multicycles in the CT-6B tokamak

Plasma Current Profile During Current Reversal in a Tokamak

Study of the DEF Feedback Control System in AC Operation of Superconducting Tokamak

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