Zobrazeno 1 - 10
of 866
pro vyhledávání: '"R.A Pitts"'
Publikováno v:
Nuclear Fusion, Vol 64, Iss 5, p 056041 (2024)
The magnetic separatrix surface is designed to provide the final and critical confinement to the hot stationary-operation core plasma in modern tokamak reactors in the absence of an external magnetic perturbation (MP) or transient magneto-hydrodynami
Externí odkaz:
https://doaj.org/article/56b914dfa7864defbaf16525e9618d56
Autor:
S. Ratynskaia, K. Paschalidis, P. Tolias, K. Krieger, Y. Corre, M. Balden, M. Faitsch, A. Grosjean, Q. Tichit, R.A. Pitts
Publikováno v:
Nuclear Materials and Energy, Vol 33, Iss , Pp 101303- (2022)
The risk of metallic armour melting constitutes a major concern for ITER and DEMO. Combined computational and experimental effort has led to a successful understanding of melt dynamics in present-day tokamaks, but there remain unexplored melting regi
Externí odkaz:
https://doaj.org/article/a8e8138df1ac4bb3ab9c583c7e502f7b
Publikováno v:
Nuclear Materials and Energy, Vol 33, Iss , Pp 101316- (2022)
In detached divertor regimes, especially in future tokamak-reactors, plasma in the divertor is strongly collisional. When ion-ion and ion-neutral collision frequencies become comparable with the ion gyrofrequency, plasma transport is strongly affecte
Externí odkaz:
https://doaj.org/article/166f2e1b78ce4ce7ba1644a768ce2471
Autor:
J. Coburn, M. Lehnen, R.A. Pitts, E. Thorén, K. Ibano, L. Kos, M. Brank, G. Simic, S. Ratynskaia, R. Khayrutdinov, V. Lukash, B. Stein-Lubrano, F.J. Artola, E. Matveeva
Publikováno v:
Nuclear Materials and Energy, Vol 28, Iss , Pp 101016- (2021)
The beryllium (Be) main chamber wall interaction during a 5 MA/1.8 T upward, unmitigated VDE scenario, first analysed in [J. Coburn et al., Phys. Scr. T171 (2020) 014076] for ITER, has been re-evaluated using the latest energy deposition analysis sof
Externí odkaz:
https://doaj.org/article/8baed4cb46bb4922a4f28e47b9c9ec5e
Autor:
S.S. Henderson, M. Bernert, C. Giroud, D. Brida, M. Cavedon, P. David, R. Dux, J.R. Harrison, A. Huber, A. Kallenbach, J. Karhunen, B. Lomanowski, G. Matthews, A. Meigs, R.A. Pitts, F. Reimold, M.L. Reinke, S. Silburn, N. Vianello, S. Wiesen, M. Wischmeier
Publikováno v:
Nuclear Materials and Energy, Vol 28, Iss , Pp 101000- (2021)
While current tokamak experiments are beginning to use real-time feedback control systems to manage the plasma exhaust, future tokamaks still require validation of theoretical models used to predict the threshold impurity concentration required to su
Externí odkaz:
https://doaj.org/article/16a3d286973141d28c8b2096805ee2b3
Publikováno v:
Nuclear Materials and Energy, Vol 19, Iss , Pp 255-261 (2019)
It is now well-known that under exposure to a helium (He) plasma at elevated temperatures, a tungsten (W) surface is modified by the growth of a fibreform nano-structure referred to as “fuzz”. Formation of W fuzz occurs when a specific set of con
Externí odkaz:
https://doaj.org/article/8e66d6244a384f3ab8c82dd179b5a9c0
Autor:
D. Borodin, J. Romazanov, R.A. Pitts, S.W. Lisgo, S. Brezinsek, I. Borodkina, A. Eksaeva, E. Safi, K. Nordlund, A. Kirschner, Ch. Linsmeier
Publikováno v:
Nuclear Materials and Energy, Vol 19, Iss , Pp 510-515 (2019)
ERO is a 3D Monte-Carlo impurity transport and plasma-surface interaction code. In 2011 it was applied for the ITER first wall (FW) life time predictions [1] (critical blanket module BM11). After that the same code was significantly improved during i
Externí odkaz:
https://doaj.org/article/b387f3edfb974689b395ea93aa2f8599
Publikováno v:
Nuclear Materials and Energy, Vol 19, Iss , Pp 19-27 (2019)
Because the gaps between plasma-facing components in fusion devices are comparable in size to the ion Larmor radius (of the order of 1 mm), magnetic field line tracing, the so-called ''optical approximation'', cannot accurately predict the fine scale
Externí odkaz:
https://doaj.org/article/580ac377d5184aa2a1c8a1a6d51f73ce
Autor:
W. Zhang, R. Bilato, T. Lunt, A. Messiaen, R.A. Pitts, S. Lisgo, X. Bonnin, V. Bobkov, D. Coster, Y. Feng, P. Jacquet, JM. Noterdaeme
Publikováno v:
Nuclear Materials and Energy, Vol 19, Iss , Pp 364-371 (2019)
The coupling of ion cyclotron range of frequencies (ICRF) power to the plasma depends critically on the scrape-off layer (SOL) density since the fast wave is evanescent below the cut-off density. The ICRF power coupling can be improved by increasing
Externí odkaz:
https://doaj.org/article/5acef3e1666c4dbcb55dfc62b6d5ffca
Publikováno v:
Nuclear Materials and Energy, Vol 18, Iss , Pp 62-66 (2019)
Numerical access to cold divertor conditions in tokamaks with EMC3-EIRENE has been proven to be challenging, but is now possible for the first time after a linearization of the electron energy sink term from interaction with neutral gas. This is show
Externí odkaz:
https://doaj.org/article/e0b37ef5783a466c89190baa653bf4c1