Results 131 to 140 of about 18,475 (245)

Piecewise Omnigenous Stellarators

Physical Review Letters
In omnigenous magnetic fields, charged particles are perfectly confined in the absence of collisions and turbulence. For this reason, the magnetic configuration is optimized to be close to omnigenity in any candidate for a stellarator fusion reactor.
J. L. Velasco, I. Calvo, F. J. Escoto, E. Sánchez, H. Thienpondt, F. I. Parra   +5 more
openaire   +3 more sources

Forced flow cryogenic cooling in fusion devices: A review. [PDF]

Heliyon, 2021
Vaghela H, Lakhera VJ, Sarkar B.
europepmc   +1 more source

Validation of a synthetic fast ion loss detector model for Wendelstein 7-X

Nuclear Fusion
We present the first validated synthetic diagnostic for fast ion loss detectors (FILDs) in the Wendelstein 7-X (W7-X) stellarator. This model has been developed on, and validated against experimental data from, a FILD provided by the National Institute ...
A. LeViness, S.A. Lazerson, A. Jansen van Vuuren, J. Rueda-Rueda, M. Beurskens, S. Bozhenkov, K.J. Brunner, O.P. Ford, G. Fuchert, M. Garcìa-Muñoz, M. Isobe, C. Killer, J. Knauer, K. Ogawa, N. Pablant, E. Pasch, P. Poloskei, T. Romba, the W7-X Team   +18 more
doaj   +1 more source

Nonlinear excitation of energetic particle-induced geodesic acoustic mode via resonance overlap in CFQS

Nuclear Fusion
Energetic particle (EP) driven instabilities are investigated in the Chinese First Quasi-axisymmetric Stellarator using the hybrid kinetic-magnetohydrodynamic code MEGA.
Zhe Chen, Hao Wang, Haijun Ren, Yasushi Todo, Jiangyue Han, Jialei Wang, CFQS Team   +6 more
doaj   +1 more source

Energetic particle loss under the effects of the radial electric field in LHD

Nuclear Fusion
The impact of the radial electric field $({E_{\text{r}}})$ on the confinement of energetic particles (EPs) in the Large Helical Device is studied through gyrokinetic simulation.
Ethan Green, Wataru Hayashi, Xishuo Wei, Zhihong Lin, Hiroyuki Yamaguchi, Masaki Osakabe, Hideo Nuga, Kunihiro Ogawa, Ryosuke Seki, Mitsutaka Isobe, Yasuko Kawamoto, Akihiro Shimizu, Takeshi Ido, Masaki Nishiura   +13 more
doaj   +1 more source

Modelling of the effect of particle species on beam losses in W7-X

Nuclear Fusion
In Wendelstein 7-X (W7-X), future campaigns will include H, D and He as both NBI injection and target plasmas but, so far, only H injection and target plasmas have been extensively performed.
L. Sanchis, T. Kurki-Suonio, K. Särkimäki, P. Ollus, J. Kontula, S. Äkäslompolo, S. Lazerson, S. Bozhenkov, H.M. Smith, the W7-X Team   +9 more
doaj   +1 more source

Influence of stochastic coil perturbations on magnetic configurations in Chinese First Quasi-axisymmetric Stellarator

Nuclear Fusion
Error fields resulting from deformations of coils are inevitable during fabrication, assembly and operation in all nuclear fusion devices. The magnetic topologies of stellarators are primarily produced by external coils, which are quite sensitive to ...
Xirui Liu, Haifeng Liu, Yuhao Cao, Yuhong Xu, Jian Zhang, Akihiro Shimizu, Mamoru Shoji, Mitsutaka Isobe, Jun Cheng, Xianqu Wang, Jie Huang, Hai Liu, Xin Zhang, Junfeng Shen, Jun Hu, Yucai Li, Weimin Xuan, Changjian Tang   +17 more
doaj   +1 more source

Design workflow of a symmetric traveling wave antenna for fast ion production on DD tokamaks

Nuclear Fusion
Initial computational plasma physics scoping and a finite element method antenna modeling design workflow for a symmetric center-fed high-field side high harmonic fast wave traveling wave array (TWA) antenna are reported here.
J.G. van de Lindt, S.J. Wukitch, N. Bertelli, S. Shiraiwa   +3 more
doaj   +1 more source

Physical origin of ultra-high neutral pressures in the Large Helical Device

Nuclear Fusion
Efficient particle exhaust remains a key challenge in magnetic confinement fusion, particularly in stellarators, where divertor neutral pressures are typically low. Recently, exceptionally high neutral pressures-up to 2.4 Pa-were measured in the divertor
U. Wenzel, G. Motojima, S. Masuzaki, M. Kobayashi, M. Goto, B. Peterson, M. Shoji   +6 more
doaj   +1 more source

Design of 3D equilibria and coils for steady-state operation of tokamaks

Nuclear Fusion
Inspired by the respective advantages of tokamaks and stellarators, we propose a quasi-axisymmetric (QA) tokamak-stellarator hybrid concept as a steady-state operation mode of standard tokamaks.
Yihui Liang, Yao Zhou, Fanghao Dong, Caoxiang Zhu, Guodong Yu, Yuansheng Zhao, Ge Dong   +6 more
doaj   +1 more source