Results 1 to 10 of about 586 (201)

Glow Discharge Boronization and Real-Time Boronization Using an Impurity Powder Dropper in LHD [PDF]

Nuclear Materials and Energy
In the Large Helical Device (LHD), boronization is utilized for wall conditioning, employing two distinct methods: glow discharge using diborane gas and the injection of boron powder into the plasma via an impurity powder dropper (IPD).
S. Masuzaki, M. Shoji, F. Nespoli, R. Lunsford, G. Motojima, M. Yajima, M. Tokitani, T. Oishi, T. Kawate, M. Goto, H. Kasahara, Y. Yoshimura, E.P. Gilson, N. Pablant, T. Morisaki   +14 more
doaj   +7 more sources

Simulation Analysis of Transport of Boron Dust Particles Injected by Impurity Powder Dropper in the Large Helical Device [PDF]

Journal of Advanced Simulation in Science and Engineering
ORCID　0000-0003-0655-7347 Boron dust particles were injected by an impurity powder dropper to improve plasma confinement and perform wall conditioning in the Large Helical Device. A fast-framing camera for monitoring dust particle trajectories in the peripheral plasma detected a change in the ablation positions of the dust particles depending on the ...
Mamoru Shoji, Gakushi Kawamura, Roman Smirnov, Yasunori Tanaka   +3 more
core   +6 more sources

Full-torus impurity transport simulation in boron powder injection experiments in the Large Helical Device [PDF]

Nuclear Materials and Energy
The toroidal distribution of boron deposition on plasma-facing components (PFCs) in boron powder injection using an impurity power dropper (IPD) was investigated by full-torus simulation and observations in a systematic plasma density-scan experiment ...
M. Shoji, G. Kawamura, R. Smirnov, J. Romazanov, A. Kirschner, Y. Tanaka, S. Masuzaki, T. Kawate, F. Nespoli, R. Lunsford, E.P. Gilson, S. Brezinsek, N.A. Pablant   +12 more
doaj   +5 more sources

Interpretive modelling of boron transport in the boundary plasma of WEST experiments with the impurity powder dropper

Nuclear Fusion, 2023
Boron (B) powder injection is a potential alternative to glow discharge boronization as a wall conditioning method for tokamaks. This technique is currently being studied in WEST experiments, during which B powder is injected by an Impurity Powder ...
K. Afonin, A. Gallo, Y. Marandet, Ph. Moreau, G. Bodner, H. Bufferand, G. Ciraolo, C. Desgranges, P. Devynck, A. Diallo, J. Gaspar, C. Guillemaut, R. Guirlet, J.-P. Gunn, N. Fedorczak, T. Loarer, R. Lunsford, P. Manas, F. Nespoli, N. Rivals, P. Tamain, E.A. Unterberg, the WEST Team   +22 more
doaj   +2 more sources

Full‐torus impurity transport simulation for optimizing plasma discharge operation using a multi‐species impurity powder dropper in the large helical device [PDF]

Contributions to Plasma Physics, 2019
AbstractThe transport of impurities supplied by a multi‐species impurity powder dropper (IPD) in the large helical device (LHD) is investigated using a three‐dimensional peripheral plasma fluid code (EMC3‐EIRENE) coupled with a dust transport simulation code (DUSTT).
M. Shoji, G. Kawamura, R. Smirnov, Y. Tanaka, S. Masuzaki, Y. Uesugi, N. Ashikawa, E. Gilson, R. Lunsford   +8 more
openaire   +4 more sources

First measurements of p¹¹B fusion in a magnetically confined plasma. [PDF]

Nat Commun, 2023
Proton-boron (p11B) fusion is an attractive potential energy source but technically challenging to implement. Developing techniques to realize its potential requires first developing the experimental capability to produce p11B fusion in the magnetically ...
Magee RM, Ogawa K, Tajima T, Allfrey I, Gota H, McCarroll P, Ohdachi S, Isobe M, Kamio S, Klumper V, Nuga H, Shoji M, Ziaei S, Binderbauer MW, Osakabe M.   +14 more
europepmc   +3 more sources

Boron transport simulation using the ERO2.0 code for real-time wall conditioning in the large helical device

Nuclear Materials and Energy, 2020
The three-dimensional Monte-Carlo impurity transport and plasma surface interaction code ERO2.0 is applied to a full-torus model for the Large Helical Device (LHD).
M. Shoji, G. Kawamura, J. Romazanov, A. Kirschner, A. Eksaeva, D. Borodin, S. Masuzaki, S. Brezinsek   +7 more
doaj   +3 more sources

Demonstration of aneutronic p-11B reaction in a magnetic confinement device [PDF]

Nuclear Fusion
Aneutronic fusion using commonly available fuel such as hydrogen and boron 11 ( ^11 B) is one of the most attractive potential energy sources. On the other hand, it requires 30 times higher temperature than deuterium–tritium fusion in a thermonuclear ...
K. Ogawa, R.M. Magee, T. Tajima, H. Gota, P. McCarroll, I. Allfrey, H. Nuga, M. Isobe, M. Osakabe   +8 more
doaj   +2 more sources

Wall conditioning and ELM mitigation with boron nitride powder injection in KSTAR

Nuclear Materials and Energy, 2021
Results from KSTAR powder injection experiments, in which tens of milligrams of boron nitride (BN) were dropped into low-power H-mode plasmas, show an improvement in wall conditions in subsequent discharges and, in some cases, a reduction or elimination ...
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   +16 more
doaj   +1 more source

Mitigation of plasma-wall interactions with low-Z powders in DIII-D high confinement plasmas [PDF]

, 2022
Experiments with low-Z powder injection in DIII-D high confinement discharges demonstrated increased divertor dissipation and detachment while maintaining good core energy confinement. Lithium (Li), boron (B), and boron nitride (BN) powders were injected
Bortolon, Alessandro, Bykov, Igor, Casali, Livia, Effenberg, Florian, Fenstermacher, Max E., Grierson, Brian A., Laggner, Florian M., Lunsford, Robert, Maingi, Rajesh, Nagy, Alexander, Nazikian, Raffi, Scotti, Filippo, Team, the DIII-D, Wang, Huiqian Q.   +13 more
core   +1 more source