The non-inductive current drive in low toroidal beta (β) steady-state superconducting tokamak-1 (SST-1) is obtained using slow waves or Lower Hybrid waves (LHW). If β of the plasma is increased either by increasing the plasma parameters (density/temperature) or by decreasing the toroidal magnetic field, the non-inductive current drive may be supported by Fast Waves (FWs), as wave accessibility is limited for slow waves at these high β plasmas. Non-inductive current drive using FWs is explored for these high β plasmas to identify the optimized parameters (operating frequency and parallel refractive index $(n_{||})$) of the fast wave. The studies indicate that FWs may be launched with an operating frequency of 0.5 GHz RF source and $n_{||}$ around 4 in SST-1 plasma. The GENRAY code is employed to carry out detailed studies on Fast Wave Current Drive (FWCD) analysis using ray tracing techniques. Computational studies on FWCD are carried out where central electron density $(n_{e0})$ and central electron temperature $(T_{e0})$ of $6\times {10}^{19}$ ${\text{m}}^{-3}$ and 3 keV respectively is assumed. The FWCD displays central depositions of RF power and is attributed to fast radial propagation compared to the parallel propagation along the toroidal magnetic field, resulting in ray transits with large number of reflections. The off-axis current drive in SST-1 plasma requires reduced radial penetration of the wave and demands unrealistic plasma parameter in terms of β. However, for SST-2 plasmas, having enhanced plasma parameters (${\beta }_N\sim 1.8$), it is found that if FWs are launched with $n_{||}\sim 3$ and f∼1.5 GHz, the radial penetration of the wave is impeded and single pass absorption in toroidal direction is observed, thus providing conducive condition for off axis current drive. It indicates that FWs would drive plasma current of 11 kA/MW at $\rho \sim 0.7$ for $n_{e0}\sim 2.2\times {10}^{20}$ ${\text{m}}^{-3}$ and $T_{e0}\sim 7.7$ keV values.

使用慢波或低混合波（LHW）获得低环形β（β）稳态超导托卡马克1（SST-1）中的无感电流驱动。如果通过增加等离子体参数（密度/温度）或通过减小环形磁场来增加等离子体的β，则非感应电流驱动可能会受到快速波（FW）的支持，因为对于慢波，波的可访问性受到限制在这些高β血浆中。针对这些高β等离子体，探索了使用FW的无感电流驱动器，以确定最佳参数（工作频率和平行折射率）$（{ñ}_{||}）$）的快速波动。研究表明，可能以0.5 GHz射频源的工作频率发射FW，并且${ñ}_{||}$在SST-1血浆中大约为4。GENRAY代码用于使用射线跟踪技术对快速波电流驱动（FWCD）分析进行详细研究。在中心电子密度下进行FWCD的计算研究$（{ñ}_{Ë0}）$ 和中心电子温度 $（{Ť}_{Ë0}）$ 的 $6\times {10}^{19}$ ${\text{米}}^{-3}$分别假定为和3 keV。与沿环形磁场的平行传播相比，FWCD显示了射频功率的中心沉积，并且归因于快速的径向传播，从而导致具有大量反射的射线传输。在SST-1等离子体中进行离轴电流驱动需要减小波的径向穿透，并需要以β表示的不切实际的等离子体参数。但是，对于SST-2等离子体，具有增强的等离子体参数（${\beta }_{ñ}〜1.8$），发现如果FW是通过以下方式启动的 ${ñ}_{||}〜3$在f〜1.5 GHz处，阻止了波的径向穿透，并且在环形方向观察到单程吸收，从而为离轴电流驱动提供了有利条件。这表明，FW将在以下条件下驱动11 kA / MW的等离子体电流$\rho 〜0.7$ 对于 ${ñ}_{Ë0}〜2.2\times {10}^{20}$ ${\text{米}}^{-3}$ 和 ${Ť}_{Ë0}〜7.7$ keV值。