Numerical studies on electron cyclotron resonance heating and optimization in the CN-H1 stellarator
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The H1-NF stellarator in the Australian National University has been transported to University of South China and is currently being restored and reconstructed to the CN-H1 stellarator. In the electron cyclotron frequency band, the CN-H1 stellarator is planned to use 2.45 GHz microwave and 28 GHz electron cyclotron heating to initiate and maintain the plasma. To further enhance the ECRH power absorption efficiency in relatively low plasma density and temperature on the CN-H1 stellarator, this paper considered multiple absorption by setting reflectors to allow EC wave to pass through cyclotron resonance layer multiple times, and the wave power absorption efficiency can be increased. Moreover, this paper optimizes launch window position and launch angle of the EC wave to alter its propagation path, allowing EC wave closer proximity to resonance layer and increasing interaction distance with resonance absorption region. The results indicate that injection from optimal launch window position (Ri, φ, Zi) = (1.40 m, 15◦, 0.1 m) and optimal launch angles, the 28 GHz ECRH power is deposited at the plasma center, achieving a maximum power absorption efficiency of 96.9 %.
Abstract
The H1-NF stellarator in the Australian National University has been transported to University of South China and is currently being restored and reconstructed to the CN-H1 stellarator. In the electron cyclotron frequency band, the CN-H1 stellarator is planned to use 2.45 GHz microwave and 28 GHz electron cyclotron heating to initiate and maintain the plasma. To further enhance the ECRH power absorption efficiency in relatively low plasma density and temperature on the CN-H1 stellarator, this paper considered multiple absorption by setting reflectors to allow EC wave to pass through cyclotron resonance layer multiple times, and the wave power absorption efficiency can be increased. Moreover, this paper optimizes launch window position and launch angle of the EC wave to alter its propagation path, allowing EC wave closer proximity to resonance layer and increasing interaction distance with resonance absorption region. The results indicate that injection from optimal launch window position (Ri, φ, Zi) = (1.40 m, 15◦, 0.1 m) and optimal launch angles, the 28 GHz ECRH power is deposited at the plasma center, achieving a maximum power absorption efficiency of 96.9 %.