Progress of research and design of microwave diagnostics on CFETR

doi:10.16568/j.0254-6086.201901007

Abstract

Abstract:

Based on parameters of the recent zero-dimensional design of CFETR the research and design for microwave diagnostics are conducted. The reflectometry system works with a combination of both O-mode and X-mode. Besides, the measurement is conducted on high field side and low field side simultaneously in order to obtain the entire density profile. O-mode of the first harmonic of electron cyclotron emission (ECE) is used to measure the core electron temperature profile while X-mode measurement of the second harmonic can provide the edge temperature profile. In order to verify the applicability of the new technique on CFETR, a multi-band coupler based on the frequency select surfaces has been developed on EAST to offer the feasible solution for the multi-band coupling technical requirement on CFETR.

Key words: Microwave diagnostics, Reflectometry, ECE measurement, CFETR

摘要：

针对最新的中国聚变工程实验堆(CFETR)零维物理设计参数，对微波诊断进行了研究以及设计工作。为了能够得到完整的密度分布，微波反射计需要同时在高场侧和低场侧进行测量，并采用寻常模以及左旋和右旋非寻常模结合的方式。电子回旋辐射一次谐频的寻常模用来测量芯部电子温度分布，而二次谐频的非寻常模测量能提供边缘温度分布。为了验证新技术在CFETR 上的可用性，EAST 装置上发展了基于频率选择表面的多波段耦合器，为CFETR 的多波段耦合的技术需求提供了可行的预研解决方案。

关键词: 微波诊断, 反射测量, 电子回旋辐射测量, CFETR

CLC Number:

TL65+2

QU Hao, HAN Xiang, GAO Xiang, ZHANG Tao, WANG Yu-min, YANG Yao, LI Gong-shun. Progress of research and design of microwave diagnostics on CFETR[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2019, 39(1): 41-47.

屈浩1, 2，韩翔1，高翔1，张涛1，王嵎民1，杨曜1，李恭顺1. CFETR 微波诊断预研与设计进展[J]. 核聚变与等离子体物理, 2019, 39(1): 41-47.

References

[1] Wan Y X, Li J, Liu Y, et al. Overview of the present progress and activities on the CFETR[J]. Nucl. Fusion,2017, 57: 102009.
[2] Silva A G, Silva F, Heuraux S, et al. First assessment of microwave diagnostics for DEMO[J]. Fusion Engineering and Design, 2015, 96–97: 948-951.
[3] Li G S, Yang Y, Wang Y M, et al. Preliminary consideration of CFETR ITER-like case diagnostic system[J]. Rev. Sci. Instrum., 2016, 87: 11D401.
[4] Mazzucato E. Microwave reflectometry for magnetically confined plasmas[J]. Rev. Sci. Instrum., 1998, 69: 2201.
[5] Vayakis G., Bretz N, Doyle E, et al. Reflectometry on ITER[J]. Rev. Sci. Instrum., 1997, 68: 435.
[6] 张博宇, 石中兵, 钟武律, 等. HL-2A 装置上的快扫Q波段微波反射系统研制[J]. 核聚变与等离子体物理,2016, 36(4): 289-296.
[7] Bornatici M, Cano R, De Barbieri O, et al. Electron cyclotron emission and absorption in fusion plasmas[J].Nucl. Fusion, 1983, 23: 1153.
[8] Kato K, Hutchinson I H. Nonthermal electron velocity distribution measured by electron cyclotron emission in Alcator C tokamak[J]. Phys. Rev. Lett., 1986, 56: 340.
[9] Kato K, Hutchinson I H. Diagnosis of mildly relativistic electron velocity distributions by electron cyclotron emission in the Alcator C tokamak[J]. Phys. Fluids, 1987,30: 3809.
[10] Carlstrom T N, Burrell K H, Groebner R J, et al.Comparison of L-H transition measurements with physics models[J]. Nucl. Fusion, 1999, 39 (11Y): 1941.
[11] Simonet F. Measurement of electron density profile by microwave reflectometry on tokamaks[J]. Rev. Sci.Instrum., 1985, 56: 664.
[12] Bekefi G. Radiation processes in plasmas[M]. New York:John Wiley and Sons, 1966. 58.
[13] Vayakis G, Walker C I, Clairet F, et al. Status and prospects for mm-wave reflectometry in ITER[J]. Nucl.Fusion, 2006, 46: S836–S845.

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