Overcurrent analyses in JT-60SA poloidal circuits due to plasma disruption and quench protection intervention

Novello, L.; Gaio, E.; Piovan, R.; Takechi, M.; Ide, S.; Matsukawa, M.

doi:10.1016/j.fusengdes.2010.07.028

Cited by 12 publications

(7 citation statements)

References 5 publications

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“…The principle of probe As the magnetically confined plasma in the Galatea we researched, it is integrated electroneutrality and isotropic. The particle energy distribution accords with Maxwell distribution [7]. In this case, if the probe potential is no more than the plasma potential, the electron current is [8]: (2), A is the surface area of the probe, e n , e T , e m mean electron density, electron temperature, electron mass respectively, U means probe potential V minus plasma space potential p…”

Section: Principle Of Thementioning

confidence: 79%

The Research of Measuring Plasma Parameters with Internal Double Langmuir Probe in Galatea

Tong

Jin

et al. 2016

2016 Eighth International Conference on Measuring Technology and Mechatronics Automation (ICMTMA)

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This paper aims to achieve the measurement of plasma parameters in Galatea. Firstly, we research the measurement principle and the theory of electron density and electron temperature calculation. Then, we analyze the probe characteristics, select the cylindrical probe to measure plasma space potential, the spherical probe to measure the plasma electron density and electron temperature. Finally, we take a simulation analysis of confined plasma in Trymyx, combing the device structure and simulation results, and we make reasonable arrangement of the probe and make effective probe measurement program to obtain the velocity distribution of the plasma shape and plasma.

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Section: Principle Of Thementioning

confidence: 79%

The Research of Measuring Plasma Parameters with Internal Double Langmuir Probe in Galatea

Tong

Jin

et al. 2016

2016 Eighth International Conference on Measuring Technology and Mechatronics Automation (ICMTMA)

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“…4 the plasma is represented with 6 equivalent toroidal filaments. There, a current distribution (entering the model) is imposed such to obtain a magnetic field similar to that produced by a reference 5.5 MA plasma with l P = 4.60 H, N = 1.23 and C = 16.4 Wb (as in [5]). Then, the plasma current uni- formly decays down to zero in 10 ms.…”

Section: Results Of the Analysesmentioning

confidence: 99%

“…In this case, the plasma has been simulated by imposing a time varying current density distribution inside the VV. This distribution has been obtained from the results of the JAEA analyses carried out with DINA code [6]. In the case considered, the plasma moves downward keeping the same initial current (5.5 MA) until 150 ms. Then, the current nullifies in about 10 ms. By applying the induced voltages to the SC model, the maximum overcurrent is estimated in 3.2 kA in the worst case (lower SC) (Fig.…”

Section: Results Of the Analysesmentioning

confidence: 99%

Electromagnetic analyses on radial field sector coils for JT-60SA

Ferro

Gaio

Takechi

et al. 2011

Fusion Engineering and Design

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“…In order to validate this initial but crucial step of our calculation, we crosschecked our inductances values with values obtained by Consorzio RFX in a JT-60SA 2008 report [1]. For coils inductances, the results show less than 1% deviation.…”

Section: B Calculation Of Inductances and Validationmentioning

confidence: 97%

“…The geometry used for coils and plasma elements relates to a 2008 JT-60SA report written by Consorzio RFX [1]. The geometry of the stabilizing plates was taken from a 2008 JT-60SA document by Takeshi-san [2].…”

Section: A Description Of the Modelmentioning

confidence: 99%

Impact of a Plasma Disruption on the Magnetic Field Variations and Heat Deposition in the TF Conductor of JT-60SA

Torre

Duchateau

Turck

et al. 2012

IEEE Trans. Appl. Supercond.

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During a plasma disruption a complex map of magnetic field variation is generated along the JT-60SA TF conductor. The current variations associated with a symmetric plasma disruption are modeled in JT-60SA, on the basis of a circuit approach. The main components of the circuit model are: the poloidal field coils, the plasma represented by circular filaments, the vacuum vessel, and the stabilizing plates. The disruption induces currents in all elements of the circuit model which produce a variation of the field map. At the location of the TF coil, this field change can be assessed and used for ac losses and stability calculations on the TF conductor. An analysis of the map will allow estimating the field change time constants and investigating which points the JT-60SA TF conductor experience the most severe field variations. Based on a recent multi-constant AC losses model for the JT-60SA TF conductor, an analytical model of stability is presented to describe the temperature increase in the cable after a plasma disruption, taking into account the heat transfer to helium during the power losses deposition. A discussion will be introduced about a possible influence of the synchronous parallel field variations, which may saturate the strand filaments and increase the heat losses dissipation.

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Overcurrent analyses in JT-60SA poloidal circuits due to plasma disruption and quench protection intervention

Cited by 12 publications

References 5 publications

The Research of Measuring Plasma Parameters with Internal Double Langmuir Probe in Galatea

The Research of Measuring Plasma Parameters with Internal Double Langmuir Probe in Galatea

Electromagnetic analyses on radial field sector coils for JT-60SA

Impact of a Plasma Disruption on the Magnetic Field Variations and Heat Deposition in the TF Conductor of JT-60SA

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