The detection of the non-absorbed millimeterwave power during EC heating and current drive
The detection of the non-absorbed millimeterwave power during EC heating and current drive
复制标题
EC加热和电流驱动过程中非吸收毫米波功率的检测
DOI：
10.1016/s0920-3796(01)00439-2
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
N. Spinicchia
中科院分区：
文献类型：
--
作者：
F. Gandini;S. Cirant;M. Hirsch;H. Laqua;S. Nowak;A. Bruschi;G. Granucci;V. Erckmann;V. Mellera;V. Muzzini;A. Nardone;A. Simonetto;C. Sozzi;N. Spinicchia
使用强大的电子回旋（EC）波源的面向聚变的设备受到高水平的RF杂散辐射。这种辐射对于暴露在其下的由RF吸收材料制成的任何物体都是潜在有害的。根据这种辐射的有效预期水平，可能需要特殊的材料或/和合适的技术来扰乱辐射。因此，需要一种可靠的方法来预测RF杂散辐射的分布和水平。研制了一种具有大辐射面和低方向性的多模天线，对任意入射线极化具有近似恒定的灵敏度。其目的是收集FTU托卡马克和温德尔斯坦7-AS仿星器等离子体在ECRH和电流驱动实验中的140 GHz杂散辐射。杂散辐射水平的理论预测是通过两种不同的方法获得的：一个多射线跟踪代码开发FTU和多细胞的代码，最初写的W7-X。这两个代码已被应用到FTU的几何形状，从而在一个很好的协议与多模态天线的实验数据。天线的设计和两个代码的结果的描述。
Fusion-oriented devices using powerful source of electron cyclotron (EC) waves are subjected to high levels of RF-stray radiation. This radiation is potentially harmful for any object made of RF-absorbing material exposed to it. Special material or/and suitable techniques to scrambling the radiation could be needed, depending on the effective expected level of such radiation. Therefore arises the need for a reliable method to foresee the distribution and the level of the RF-stray radiation. A multi-modal antenna, with sensitivity approximately constant for any incoming linear polarization, with great radiating surface and low directivity has been developed. Its purpose is collecting 140 GHz stray radiation from FTU tokamak and Wendelstein 7-AS stellarator plasmas during ECRH and current drive experiments. Theoretical predictions for stray radiation levels are obtained by two different methods: a multiple ray tracing code developed for FTU and a multi-cell code, originally written for W7-X. Both codes have been applied to FTU geometry, resulting in a good agreement with the experimental data from the multi-modal antenna. Descriptions of the antenna design and of the results from both codes are presented.