Control and operation of the gas injection systems for KSTAR tokamak

Kim, Young Ok; Song, Jae In; Kim, Kwang Pyo; Chu, Yong; Park, Kap Rai; Kim, Hong Tack; Kim, Hak Kun; Lee, Kun Su; Kim, Yang Mo

doi:10.1016/j.fusengdes.2013.01.053

Cited by 14 publications

(13 citation statements)

References 4 publications

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“…According to Ref. 24 and 27, the apparent poloidal rotation velocity measured by MIR also includes the contribution from toroidal flow. Here, the effects of V ϕ to v θ can be excluded.…”

Section: Resultsmentioning

confidence: 99%

“…Neutral beam injection (NBI) beam blip is used for the measurement of CES. Multi-pulse supersonic molecular beam injection (SMBI) [24] is applied to trigger NLT and find the cutoff density. Simple structure, good flexibility and relatively high fuelling efficiency make SMBI the most suitable tool to investigate NLT phenomenon which has been firstly applied to fusion plasma by Lianghua Yao in HL-1M tokamak [25].…”

Section: Methodsmentioning

confidence: 99%

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Intrinsic rotation reversal, non-local transport, and turbulence transition in KSTAR L-mode plasmas

Shi¹,

Kwon²,

Diamond³

et al. 2017

Nucl. Fusion

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Experiments of electron cyclotron resonance heating (ECH) power scan in KSTAR tokamak clearly demonstrate that both the cut-off density for non-local heat transport (NLT) and the threshold density for intrinsic rotation reversal can be determined by the collisionality. We demonstrate that NLT can be affected by ECH, and the intrinsic rotation direction follows the changes of NLT. The cut-off density of NLT and threshold density for rotation reversal can be significantly extended by ECH. The poloidal flow of turbulence in core plasma is in the electron and the ion diamagnetic direction in ECH plasmas and high density OH plasma, respectively. The auto-power spectra of density fluctuation are almost the same in the outer region for both ECH and OH plasmas. On the other hand, in the core region of ECH plasmas, the power spectra of the density fluctuations are broader than those of OH plasma. All these observations in macroscopic parameters and micro fluctuations suggest a possible link between the macro phenomena and the structural changes in microfluctuations.

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“…According to Ref. 24 and 27, the apparent poloidal rotation velocity measured by MIR also includes the contribution from toroidal flow. Here, the effects of V ϕ to v θ can be excluded.…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Intrinsic rotation reversal, non-local transport, and turbulence transition in KSTAR L-mode plasmas

Shi¹,

Kwon²,

Diamond³

et al. 2017

Nucl. Fusion

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show abstract

“…The increase of density is moderate for GP, while for SGI, a strong density rise is observed, with a first spike followed by a slower decay. [6] :…”

Section: Resultsmentioning

confidence: 99%

“…The confined gas in the valve is cooled down by its enclosing cooling channel. [6] The performance test for SMBI system was carried out at the fuel temperature of near 100 K. A rectangular pulse train with a pulse width of 2 ms and an interval of 500 ms was applied to the valve. The valve inlet was pressurized at 10 bar with deuterium.…”

Section: Young Ok Kim Et Al-kstar Tokamak-south Koreamentioning

confidence: 99%

Supersonic Gas Injection Fuelling in Tokamaks

2017

IJAERD

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“…It is economical to develop and to maintain. This method has been tested around the world in many fusion reactor tokamaks by researchers for example, NSTX [3,4] , Tore Supra [5] , KSTAR [6] , HL-1M [7,8] , ADITYA [9] etc. After many experiments they have concluded that Supersonic molecular beam injection (SMBI) is suitable for small and medium sized tokamaks.…”

Section: Introductionmentioning

confidence: 99%

Design of Nozzles for Supersonic Gas Injector Prototype

2017

IJAERD

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Control and operation of the gas injection systems for KSTAR tokamak

Cited by 14 publications

References 4 publications

Intrinsic rotation reversal, non-local transport, and turbulence transition in KSTAR L-mode plasmas

Intrinsic rotation reversal, non-local transport, and turbulence transition in KSTAR L-mode plasmas

Supersonic Gas Injection Fuelling in Tokamaks

Design of Nozzles for Supersonic Gas Injector Prototype

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