# Role of explosive instabilities in high-β disruptions in tokamaks

@article{Aydemir2016RoleOE, title={Role of explosive instabilities in high-$\beta$ disruptions in tokamaks}, author={A. Aydemir and H.H. Lee and S.G. Lee and J. Seol and B.-H. Park and Yongkyoon In}, journal={Nuclear Fusion}, year={2016}, volume={56} }

Intrinsically explosive growth of a ballooning finger is demonstrated in nonlinear magnetohydrodynamic calculations of high-β disruptions in tokamaks. The explosive finger is formed by an ideally unstable n = 1 mode, dominated by an m/n = 2/1 component. The quadrupole geometry of the 2/1 perturbed pressure field provides a generic mechanism for the formation of the initial ballooning finger and its subsequent transition from exponential to explosive growth, without relying on secondary…

## 7 Citations

### Dynamics of an n = 1 explosive instability and its role in high-β disruptions

- Physics
- 2017

Some low-n kink-ballooning modes not far from marginal stability are shown to exhibit a bifurcation between two very distinct nonlinear paths that depends sensitively on the background transport…

### Nonlinear ballooning modes in tokamaks: stability and saturation

- PhysicsPlasma Physics and Controlled Fusion
- 2018

The nonlinear dynamics of magneto-hydrodynamic ballooning mode perturbations is conjectured to be characterised by the motion of isolated elliptical flux tubes. The theory of stability, dynamics and…

### Formation and evolution of quasi-interchange convection cell on the HL-2A tokamak

- PhysicsPhysics of Plasmas
- 2018

Formation and evolution of quasi-interchange convection cell have been observed for the first time by an electron cyclotron emission imaging (ECEI) system on the HL-2A tokamak. The instability with…

### Physics-guided machine learning approaches to predict the ideal stability properties of fusion plasmas

- PhysicsNuclear Fusion
- 2020

One of the biggest challenges to achieve the goal of producing fusion energy in tokamak devices is the necessity of avoiding disruptions of the plasma current due to instabilities. The disruption…

### Design of Signal Analysis Techniques for Determining the Parameters Responsible for Plasma Disruptions in Aditya Tokamak

- Physics2018 9th International Conference on Computing, Communication and Networking Technologies (ICCCNT)
- 2018

The major functionality problem in Aditya Tokamak is due to disruption of plasma and the functionality problems can be controlled by choosing the suitable parameter which can identify the plasma disruption by its property and analysis of signal.

### Heat transfer analysis of tokamak in-vessel coil water-cooling channel joint

- Engineering, Physics
- 2020

### Observation of the ballooning mode that limits the operation space of the high-density super-dense-core plasma in the LHD

- Physics
- 2017

The central beta of the super-dense-core (SDC) plasma in the large helical device (LHD) is limited by a large scale MHD event called ‘core density collapse’ (CDC). The detailed measurement reveals…

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