http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Design of the ITER VUV edge imaging spectrometer and R&D for the rotary motional vacuum feed-through
Seon, C.R.,Jeon, J.S.,Cheon, M.S.,Pak, S.,Lee, H.G.,Bernascolle, P.,Barnsley, R. North-Holland ; Elsevier Science Ltd 2016 Fusion engineering and design Vol.109 No.1
The ITER vacuum ultraviolet (VUV) spectrometer is aimed at monitoring impurity ion species in plasmas, and it consists of three systems, core survey, edge imaging, and divertor spectrometers depending on positions. In the VUV edge imaging spectrometer, a field mirror and a collimation mirror are used for imaging of the light onto the entrance slit of the VUV imaging spectrometer. To optimize the design of the field mirror box in the ITER port plug, the mirror box mock-up was developed to test installation and alignment. Especially, the mirror alignment using a special tilt stage was tested, and the motional feed-through with a double bellows was developed for the shutter operation. The preliminary qualification test for this rotary motional vacuum feed-through was performed to meet the functional requirement of ITER mechanical feed-through. Leak-tightness for over 15,000 times (larger than operation times) of 360 rotation and backward motion was tested for 1N.m loading condition to the axis rod of the feed-through. In the test, the vacuum inside of the feed-through was monitored, and the feed-through showed good rotation function and leak-tightness during test.
Seon, C R,Hong, J H,Jang, J,Lee, S H,Choe, W,Lee, H H,Cheon, M S,Pak, S,Lee, H G,Biel, W,Barnsley, R American Institute of Physics 2014 Review of scientific instruments Vol.85 No.11
<P>To optimize the design of ITER vacuum ultraviolet (VUV) spectrometer, a prototype VUV spectrometer was developed. The sensitivity calibration curve of the spectrometer was calculated from the mirror reflectivity, the grating efficiency, and the detector efficiency. The calibration curve was consistent with the calibration points derived in the experiment using the calibrated hollow cathode lamp. For the application of the prototype ITER VUV spectrometer, the prototype spectrometer was installed at KSTAR, and various impurity emission lines could be measured. By analyzing about 100 shots, strong positive correlation between the O VI and the C IV emission intensities could be found.</P>
VUV spectroscopy in impurity injection experiments at KSTAR using prototype ITER VUV spectrometer
Seon, C. R.,Hong, J. H.,Song, I.,Jang, J.,Lee, H. Y.,An, Y. H.,Kim, B. S.,Jeon, T. M.,Park, J. S.,Choe, W.,Lee, H. G.,Pak, S.,Cheon, M. S.,Choi, J. H.,Kim, H. S.,Biel, W.,Bernascolle, P.,Barnsley, R. American Institute of Physics 2017 Review of scientific instruments Vol.88 No.8
BRIEF REPORTS ON KAISTSAT-4 MISSION ANALYSIS
J. Seon,K. I. Seon,S. H. Kim,K. W. Min,B. J. Kim,R. C. K. Yong,L. F. Leong,H. J. Chun,H. S. Chang,H. S. Kim,J. S. Bae,Y. W. Choi,S. R. LEE,Y. H. Shin,K. S. Ryu,J. J. Lee,D. H. Lee,D. J. Park 한국우주과학회 2000 Journal of Astronomy and Space Sciences Vol.17 No.2
Operational Radioactivity Evaluation of ITER Diagnostic Neutron Activation System
Cheon, M.S.,Seon, C.R.,Pak, S.,Lee, H.G.,Bertalot, L.,Forrest, R.A. IEEE 2010 IEEE transactions on plasma science Vol.38 No.3
<P>At the International Thermonuclear Experimental Reactor (ITER), a neutron activation system is foreseen to measure neutron fluence on the first wall and to evaluate total fusion power from ITER plasma. This system utilizes the method of counting gamma radiation from the metal sample irradiated by the neutron flux at the irradiation end located near the plasma. Evaluation of the operational radioactivity of the sample, which has been induced during ITER operation, is necessary in order to determine sample material, mass, and the appropriate irradiation time. Neutronic calculations are performed to evaluate operational activity of the sample. Activation of the sample is calculated according to the irradiation time for various sample materials such as Si, Al, Ti, Fe, Nb, and Cu and by assuming that the samples are irradiated at the midplane inboard region where the neutron flux is one of the strongest.</P>