Long Distance Coupling of Lower Hybrid Waves in ITER Relevant Edge Conditions in JET Reversed Shear Plasmas
Long Distance Coupling of Lower Hybrid Waves in ITER Relevant Edge Conditions in JET Reversed Shear Plasmas
复制标题
DOI：
10.1063/1.1638032
复制
发表时间：
2003-12
影响因子：
2.2
通讯作者：
A. Ekedahl;G. Grancucci;J. Mailloux;V. Petržílka;K. Rantamäki;Y. Baranov;K. Erents;M. Goniche;E. Joffrin;P. Lomas;M. Mantsinen;D. McDonald;J. Noterdaeme;V. Pericoli;R. Sartori;C. Silva;M. Stamp;A. Tuccillo;F. Žáček;Efda-Jet contributors
中科院分区：
文献类型：
--
作者：
A. Ekedahl;G. Grancucci;J. Mailloux;V. Petržílka;K. Rantamäki;Y. Baranov;K. Erents;M. Goniche;E. Joffrin;P. Lomas;M. Mantsinen;D. McDonald;J. Noterdaeme;V. Pericoli;R. Sartori;C. Silva;M. Stamp;A. Tuccillo;F. Žáček;Efda-Jet contributors
在JET的最新LH电流驱动实验中，向证明在ITER中耦合低杂化（LH）波的可行性迈出了重要一步。通过从磁性连接到发射装置的专用气体注入模块注入气体（D2或CD4）来增加LH发射装置前方的局部电子密度。在I型和III型elm中，PLHCD=3MW，在最后封闭通量面与发射器之间10cm的距离处，PLHCD=3MW的平均反射系数为5%。为了优化LH发射器的气体定位，在对气体喷射系统进行了修改后，D2喷射被证明比CD4更有效。当D2通量为5−8×1021el/s时，在10cm间隙处提供了良好的耦合条件，而当使用CD4时，在9cm间隙处需要12×1021el/s的通量。血浆性能（中子率、H因子、离子温度）与D2和CD4相似。一个……
A significant step towards demonstrating the feasibility of coupling Lower Hybrid (LH) waves in ITER has been achieved in the latest LH current drive experiments in JET. The local electron density in front of the LH launcher was increased by injecting gas (D2 or CD4) from a dedicated gas injection module magnetically connected to the launcher. PLHCD=3MW was coupled with an average reflection coefficient of 5%, at a distance between the last closed flux surface and the launcher of 10cm, in plasmas with an internal transport barrier (ITB) and H‐mode edge, with type I and type III ELMs. Following a modification of the gas injection system, in order to optimise the gas localisation with respect to the LH launcher, injection of D2 proved to be more efficient than CD4. A D2 flux of 5−8×1021el/s provided good coupling conditions at a clearance of 10cm, while when using CD4, a flux of 12×1021el/s was required at 9cm. The plasma performance (neutron rate, H‐factor, ion temperature) was similar with D2 and CD4. An ...