Article
Physics, Fluids & Plasmas
R. Lunsford, S. Masuzaki, F. Nespoli, N. Ashikawa, E. P. Gilson, D. A. Gates, K. Ida, G. Kawamura, T. Morisaki, A. Nagy, T. Oishi, M. Shoji, C. Suzuki, M. Yoshinuma
Summary: Controlled particulate injections have shown positive effects on plasma wall conditions, with experiments demonstrating improvement across a range of parameters. Successful injections are confirmed by both spectroscopic measurements and real-time camera signals, paving the way for further development of real-time boronization techniques.
Article
Nuclear Science & Technology
F. Effenberg, A. Bortolon, H. Frerichs, B. Grierson, J. D. Lore, T. Abrams, T. E. Evans, Y. Feng, R. Lunsford, R. Maingi, A. Nagy, R. Nazikian, D. Orlov, J. Ren, D. L. Rudakov, W. R. Wampler, H. Q. Wang
Summary: The injection of local boron powder for real-time wall conditioning in DIII-D L-mode experiments has been interpreted using the 3D plasma edge transport Monte Carlo code EMC3-EIRENE. The study found that the distribution of boron in the plasma is non-axisymmetric, influenced by plasma density and heating conditions. Thermal and frictional forces play a role in the deposition and distribution of boron in the scrape-off layer (SOL) and on the divertor.
NUCLEAR MATERIALS AND ENERGY
(2021)
Article
Nuclear Science & Technology
E. P. Gilson, H. H. Lee, A. Bortolon, W. Choe, A. Diallo, S. H. Hong, H. M. Lee, J. Lee, R. Maingi, D. K. Mansfield, A. Nagy, S. H. Park, I. W. Song, J. I. Song, S. W. Yun, S. W. Yoon, R. Nazikian
Summary: Results from KSTAR powder injection experiments show that injecting boron nitride into low-power H-mode plasmas can improve wall conditions and reduce ELMs, highlighting the potential of powder injection for wall conditioning during and between plasma discharges.
NUCLEAR MATERIALS AND ENERGY
(2021)
Article
Physics, Fluids & Plasmas
T. Kawate, N. Ashikawa, M. Goto, T. Oishi, Y. Kawamoto, H. Toyoda, M. Shoji, G. Kawamura, S. Masuzaki, F. Nespoli, E. P. Gilson, R. Lunsford, C. Suzuki, A. Nagy, D. Gates
Summary: This study investigates the impact of boron powder dropping on plasma wall conditioning. The results suggest that boron can reduce hydrogen recycling, facilitate impurity gettering, and achieve effective real-time wall conditioning.
Article
Nuclear Science & Technology
K. P. Kim, H. M. Lee, H. H. Lee, H. S. Kim, J. I. Song, N. Y. Joung, K. R. Park
Summary: Various wall conditioning techniques have been developed by KSTAR to maintain a reliable vacuum environment since 2008. Some of these techniques have been used to quickly recover the vacuum condition after temporary disruptions caused by abnormal events. The appropriate conditioning procedures have been selectively chosen based on the extent of the event's impact. This paper categorizes the various events experienced during over 10 years of KSTAR operation according to their impact on the vacuum environment and describes the specific wall recovery procedures applied to some of the events.
FUSION ENGINEERING AND DESIGN
(2023)
Article
Materials Science, Ceramics
Xu Jiang, Jie Sun, Xiaojie Chai, Yifan Chen, Wei Zhang, Jun Jiang, Anquan Jiang
Summary: The study found that the wall current varies with the angle between the applied electric field and the initial polarization, and that the oxygen vacancy concentration can be controlled through thermal annealing, affecting the magnitude of the domain wall current.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Kalani Moore, Eoghan N. O'Connell, Sinead M. Griffin, Clive Downing, Louise Colfer, Michael Schmidt, Valeria Nicolosi, Ursel Bangert, Lynette Keeney, Michele Conroy
Summary: This study shows that the thin-film Aurivillius phase Bi6TixFeyMnzO18 is an ideal material platform for domain wall and vortex topology-based nanoelectronic devices. The presence and structure of charged domain walls are revealed using atomic-resolution electron microscopy. Moreover, it is found that polar vortex-type topologies also form at out-of-phase boundaries of stacking faults. The study suggests the potential for strain engineering to control the formation of polar vortex topology in other multiferroic thin films.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nuclear Science & Technology
T. Nakano, D. Douai, S. Vartanian, M. Fukumoto, S. H. Son, J. H. Jang, W. Jeong, J. Kim, S-H Hong, H. H. Lee
Summary: This study investigates the dependence of EC injection power, EC injection width, and prefilled He pressure on the efficiency of D2 outgassing. The results show that an increase in EC injection power leads to a clear increase in D2 outgassing. Among the parameters studied, the dependence of D2 outgassing on EC power injection is the most pronounced. It is also found that there exists an optimum prefilled He pressure for achieving maximum D2 outgassing efficiency under constant EC injection power.
NUCLEAR MATERIALS AND ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Chong Li, Matthew P. Aldred, Rachel A. Harder, Ying Chen, Dmitry S. Yufit, Ming-Qiang Zhu, Mark A. Fox
Summary: The dithienylethene molecule with carborane clusters exhibits exceptional fatigue resistance and vivid color changes under alternating UV and visible light. Its fluorescence can be toggled on and off in the solid state but not in solution.
CHEMICAL COMMUNICATIONS
(2021)
Article
Physics, Applied
So Yeon Lim, Min Sun Park, Ahyoung Kim, Sang Mo Yang
Summary: The study investigated the nonlinear response of domain wall velocity to an external electric field in ferroelectric Si-doped HfO2 thin film capacitors. The results confirmed the reliability of PFM images and observed thermally activated creep and flow regimes. The thin film was found to have random-field defects with a dynamic exponent of mu = 1, consistent with the Lorentzian distribution of characteristic switching time indicated in the switching current data.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Xiaorang Tian, Chuizhou Meng, Xin Zhao, Bing Liu, Guanchao Zhao, Ge Nie, Guoyun Yang, Guosong Zhang, Peide Han
Summary: The study utilized diborane glow discharges to investigate the impact of material type and surface roughness on boronization and plasma performance. It was found that a surface roughness below 0.8 μm was optimal for achieving maximum binding force on stainless steel, while difficulties were encountered when attempting boron film growth on copper due to oxygen enrichment hindering boron-boron bond formation. Following boronization, the partial pressure of residual gases in the chamber, including H2O, CO2, CO, and O2, was significantly reduced, indicating successful mitigation of oxygen and carbon impurities.
Article
Chemistry, Analytical
Nannan Ding, Ke Liu, Yanyu Qi, Congdi Shang, Xingmao Chang, Yu Fang
Summary: The synthesis of a highly fluorescent P MI-CBH derivative enabled the creation of a sensitive film for the detection of methamphetamine in liquid phase, with a low detection limit and quick response time. The film was also shown to be stable, reusable, and effective for real-life applications, indicating its potential for practical use.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Ceramics
Qiqi Peng, Xu Jiang, Yifan Chen, Wei Zhang, Jun Jiang, Anquan Jiang
Summary: The study presents a method to achieve large domain wall currents at high domain wall densities, which has potential applications in future nanosensors and nonvolatile memories.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Hanqiang Wang, Jie Zhang, Zuowei Xie
Summary: This study investigates the reactivity of carborane-fused borirane and demonstrates its ability to undergo ring-opening reactions with various Lewis acids and ring-expansion reactions with unsaturated molecules. The results not only enrich the reaction chemistry of boriranes, but also provide new pathways for the synthesis of boron-containing compounds and heterocycles.
Article
Engineering, Electrical & Electronic
Wenping Geng, Jinlong He, Xiaojun Qiao, Liya Niu, Caiqin Zhao, Gang Xue, Kaixi Bi, Linyu Mei, Xiangjian Wang, Xiujian Chou
Summary: This study investigated the domain wall current of single crystal LiNbO3 thin film and fabricated a packaged DWC temperature sensor. The experiment showed that DWC has a negative temperature coefficient and a high current on-off ratio of 103.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Engineering, Manufacturing
Hyun-Joon Roh, Sangwon Ryu, Yunchang Jang, Nam-Kyun Kim, Younggil Jin, Seolhye Park, Gon-Ho Kim
IEEE TRANSACTIONS ON SEMICONDUCTOR MANUFACTURING
(2018)
Article
Physics, Multidisciplinary
Jun-Seok Nam, Mi-Yeon Lee, Jun-Ho Seo, Gon-Ho Kim
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2018)
Article
Materials Science, Ceramics
Hyo Yeon Kim, Ji Hyeun Nam, Sheby Mary George, Jin-Seong Park, Bo Keun Park, Gun Hwan Kim, Dong Ju Jeon, Taek-Mo Chung, Jeong Hwan Han
CERAMICS INTERNATIONAL
(2019)
Article
Physics, Fluids & Plasmas
Seolhye Park, Taeyoung Cho, Yongsuk Jang, Yeongil Noh, Younghoon Choi, Taewon Cha, Juyoung Lee, Byungsoo Kim, Jae-Ho Yang, Jeong-Jin Hong, Youngkwan Park, Gon-Ho Kim, Won-Hyouk Jang
PLASMA PHYSICS AND CONTROLLED FUSION
(2019)
Article
Clinical Neurology
Sung-Young Yoon, Gon-ho Kim, Yushin Kim, Nack Hwan Kim, Sangheon Lee, Christina Kawai, Youngki Hong
JOURNAL OF NEUROLOGICAL SURGERY PART A-CENTRAL EUROPEAN NEUROSURGERY
(2019)
Article
Nanoscience & Nanotechnology
Jin Joo Ryu, Kanghyeok Jeon, Seungmin Yeo, Geonhee Lee, Chunjoong Kim, Gun Hwan Kim
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Computer Science, Interdisciplinary Applications
Junmo Koo, Damdae Park, Sangwon Ryu, Gon-Ho Kim, Youn-Woo Lee
COMPUTERS & CHEMICAL ENGINEERING
(2019)
Article
Physics, Applied
Seolhye Park, Yunyoung Kyung, Juyoung Lee, Yongsuk Jang, Taewon Cha, Yeongil Noh, Younghoon Choi, Byungsoo Kim, Taeyoung Cho, Rabul Seo, Jae-Ho Yang, Yunchang Jang, Sangwon Ryu, Gon-Ho Kim
PLASMA PROCESSES AND POLYMERS
(2019)
Article
Materials Science, Multidisciplinary
Yunchang Jang, Hyun-Joon Roh, Seolhye Park, Sangmin Jeong, Sanywon Ryu, Ji-Won Kwon, Nam-Kyun Kim, Gon-Ho Kim
CURRENT APPLIED PHYSICS
(2019)
Article
Physics, Applied
Dong Kyu Lee, Gun Hwan Kim, Hyunchul Sohn, Min Kyu Yang
APPLIED PHYSICS LETTERS
(2019)
Article
Engineering, Electrical & Electronic
Navaj Mullani, Ijaz Ali, Tukaram D. Dongale, Gun Hwan Kim, Byung Joon Choi, Muhammad Abdul Basit, Tae Joo Park
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2020)
Article
Materials Science, Multidisciplinary
Dong Kyu Lee, Gun Hwan Kim, Hyunchul Sohn, Min Kyu Yang
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2020)
Article
Multidisciplinary Sciences
Wan-Ook Ji, Min-Ho Lee, Gon-Ho Kim, Eun-Hee Kim
SCIENTIFIC REPORTS
(2019)
Article
Dentistry, Oral Surgery & Medicine
Ji-Yoon Lee, Kyoung-Hwa Kim, Shin-Young Park, Sung-Young Yoon, Gon-Ho Kim, Yong-Moo Lee, In-Chul Rhyu, Yang-Jo Seol
JOURNAL OF PERIODONTAL AND IMPLANT SCIENCE
(2019)
Proceedings Paper
Engineering, Environmental
Junmo Koo, Damdae Park, Sangwon Ryu, Gon-Ho Kim, Youn-Woo Lee
28TH EUROPEAN SYMPOSIUM ON COMPUTER AIDED PROCESS ENGINEERING
(2018)
