First density profile measurements using frequency modulation of the continuous wave reflectometry on JET.
First density profile measurements using frequency modulation of the continuous wave reflectometry on JET.
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DOI：
10.1063/1.2972134
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发表时间：
2008-10
期刊：
影响因子：
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通讯作者：
L. Meneses;L. Cupido;A. Sirinelli;M. Manso
中科院分区：
文献类型：
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作者：
L. Meneses;L. Cupido;A. Sirinelli;M. Manso
我们提出的主要设计方案和实施的X模式反射计开发和成功安装在JET使用创新的方法。它的目的是证明的可行性，测量密度分布与高空间和时间分辨率使用宽带反射测量长而复杂的传输线。它使用V波段[约（0-1.4）x10（19）m（-3）]探测磁场在2.4和3.0 T之间的等离子体。第一个实验结果表明，当测量发生ITER相关制度，如ELMy H-模式的等离子体密度分布的变化时，诊断的高灵敏度。这一概念的成功演示推动了JET连续波（FMCW）反射测量诊断频率调制的升级，以探测边缘和核心。这个新的系统是必不可少的，以证明使用FMCW反射计技术探测等离子体在下一步的设备，如ITER的可行性，因为它们共享相同的波导复杂性。
We present the main design options and implementation of an X-mode reflectometer developed and successfully installed at JET using an innovative approach. It aims to prove the viability of measuring density profiles with high spatial and temporal resolution using broadband reflectometry operating in long and complex transmission lines. It probes the plasma with magnetic fields between 2.4 and 3.0 T using the V band [approximately (0-1.4)x10(19) m(-3)]. The first experimental results show the high sensitivity of the diagnostic when measuring changes in the plasma density profile occurring ITER relevant regimes, such as ELMy H-modes. The successful demonstration of this concept motivated the upgrade of the JET frequency modulation of the continuous wave (FMCW) reflectometry diagnostic, to probe both the edge and core. This new system is essential to prove the viability of using the FMCW reflectometry technique to probe the plasma in next step devices, such as ITER, since they share the same waveguide complexity.