http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Li Dingzhen (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Research of aluminum nitride water load for the 4.6 GHz 500 kW LHCD system of the CFETR
Li Dingzhen,Zhang Liyuan,Zhao Lianmin,Liu Fukun,Cheng Min,Hu Huaichuan,Zhou Taian 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.9
To meet the increasing heating needs of the China Fusion Experimental Tokamak Reactor (CFETR), the output power in each Lower Hybrid Current Drive (LHCD) transmission line should be increased from 250 kW to 500 kW. Therefore, a new high-power water load must be developed for the 4.6 GHz 500 kW LHCD system. This paper aims to report the most recent research progress of the water load: aluminum nitride (AlN) ceramic is used as the media material to isolate the water and vacuum, and the radio frequency (RF) simulation results show that the return loss of the water load is less than 25dB at 4.6 GHz over a wide temperature range. Under 500 kW continuous wave (CW) operation, the maximum temperatures of the ceramic and water are separately 67 C and 62 C, resulting in thermal deformation of the ceramic of approximately 0.003 mm. Moreover, the AlN water load was tested on the 4.6 GHz 250 kW high-power test bench and found to work well with low reflected power.
-
Quasi-optical design and analysis of a remote steering launcher for CFETR ECRH system
Chao Zhang,Wang Xiaojie,Wu Dajun,Tang Yunying,Wang Hanlin,Li Dingzhen,Liu Fukun,Wu Muquan,Yan Peiguang,Gao Xiang,Li Jiangang 한국원자력학회 2024 Nuclear Engineering and Technology Vol.56 No.5
In order to optimize the operational safety and reliability of the upper launcher for the CFETR ECRH system, a design of the launcher for NTM control based on the remote steering concept is currently being carried out for comparison with the front steering equivalent. This paper presents the layout design and analysis of the quasioptical system in the remote steering launcher. A 3D visual quasi-optical design tool has been developed for the quasi-optical system, which can parameterize modeling, perform general astigmatic beam calculation and show the accurate beam propagation path in the upper port. Three identical sets of quasi-optical modules are arranged in the launcher, and each one consists of two fixed double-curvature focusing mirrors, which focus and reflect the steering beams ( 12◦–12◦) from two square corrugated waveguides. The beam characteristics at the resonance layer are described, and the average beam radius is < 100 mm. The peak head loads on the surfaces of the two fixed mirrors are 1.63 MW/m2 and 1.52 MW/m2. The position and size of the beam channel in the blanket are obtained, and the opening apertures on the launcher-facing and plasma-facing sides of the blanket module are 0.54 m2 and 0.4 m2, respectively.
-
Conceptual design and analysis of remote steering system for CFETR ECRH system
Chao Zhang,Xiaojie Wang,Dajun Wu,Yunying Tang,Hanlin Wang,Dingzhen Li,Fukun Liu,Muquan Wu,Peiguang Yan,Xiang Gao,Jiangang Li Korean Nuclear Society 2024 Nuclear Engineering and Technology Vol.56 No.2
In order to optimize the operational safety and reliability of the upper launcher for the CFETR ECRH system, a design of the launcher based on the remote steering concept is currently being carried out for comparison with the front steering equivalent. This paper presents the remote steering system's conceptual design and simulation analysis. A Square Corrugated Waveguide (SCW) of 65 × 65 mm has been designed with an optimized length of 9.35 m. By changing the relative length of the waveguide, the transmission efficiency of the SCW is optimized within the range of steering angles ±12°. Different error factors are investigated in detail, and corresponding acceptable error ranges are provided. Considering these error factors and ignoring ohmic losses and thermal effects, the relative transmission efficiency of the SCW is estimated to be >98 % within the steering angle range. A matching steering unit for the SCW is designed, which consists of an ellipsoidal focusing mirror and a steerable flat mirror. The detailed design of the steerable mirror motion trajectory is presented. Also, the influence of the possible beam incident errors caused by the steering unit on the transmission efficiency is analyzed in detail.
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
