Results 11 to 20 of about 100,982 (265)

Stability of divertor detachment

Nuclear Materials and Energy, 2017
The 2D simulations of edge plasma transport show that unlike some earlier publications, the impurity radiation loss per se does not cause the bifurcation-like transition to detached divertor regime.
Yanzeng Zhang, A S Kukushkin, S I Krasheninnikov   +2 more
exaly   +5 more sources

Study on divertor detachment and pedestal characteristics in the DIII-D upper closed divertor

Nuclear Fusion, 2023
Experiments performed in DIII-D demonstrate that higher plasma current and heating power combined with impurity seeding facilitate the achievement of divertor detachment with a higher pedestal pressure and higher plasma performance in H-mode plasmas with
H.Q. Wang, D.M. Thomas, A.W. Leonard, X.X. Ma, H.Y. Guo, A.L. Moser, J.G. Watkins, F. Scotti, C. Lasnier, M.E. Fenstermacher, A.G. McLean, M.W. Shafer, B. Grierson, J. Ren, T.H. Osborne   +14 more
doaj   +2 more sources

Divertor geometry effects on detachment in TCV [PDF]

Journal of Nuclear Materials, 2001
Experimental observations and some preliminary results from B2-Eirene code modelling of divertor detachment in the TCV tokamak are reported, with emphasis on the aspects of this detachment related to divertor geometry. The contribution is restricted to deuterium fuelled ohmic plasmas for which the CB drift is directed away from the X-point of lower ...
Pitts, R. A., Duval, B. P., Loarte, A., Moret, J. M., Boedo, J. A., Coster, D., Furno, I., Horacek, J., Kukushkin, A. S., Reiter, D., Rommers, J.   +10 more
openaire   +4 more sources

The effect of divertor closure on detachment onset in DIII-D

Nuclear Materials and Energy, 2019
Experiments at DIII-D use different divertor geometries to measure the effect of divertor closure on detachment onset. We compare matched H-mode discharges in the closed (upper) divertor and the open (lower) divertor and use as a detachment onset metric ...
A L Moser, A G McLean, H Q Wang
exaly   +3 more sources

The effect of impurity seeding into the closed divertor on plasma detachment in the HL-2A tokamak

Nuclear Fusion, 2023
Recent progress towards an increased understanding of detached divertor physics has been made with the highly closed divertor geometry in HL-2A. Non-intrinsic impurities were injected into the outer divertor chamber, and increased divertor neutral ...
J.M. Gao, L.Z. Cai, C.Z. Cao, H.C. Ma, R. Ke, N. Wu, Y. Hu, X.Y. Gao, C.H. Cui, Z.H. Huang, L. Nie, L. Liu, Z.C. Yang, X. Yu, Y.G. Li, M. Jiang, G.Q. Xue, W.L. Zhong, T. Wu, Z.B. Shi, L.W. Yan, X.Q. Ji, M. Xu, HL-2A Team   +23 more
doaj   +2 more sources

Dependence of neutral pressure on detachment in the small angle slot divertor at DIII-D

Nuclear Materials and Energy, 2019
Local neutral pressure measurements in the closed small angle slot (SAS) divertor [1,2] on DIII-D show a large increase when the divertor plasma shifts from high recycling into detachment. In-tile pressure gauges were installed to measure the pressure in
Morgan Shafer, Livia Casali, H Y Guo
exaly   +3 more sources

The role of drifts on the isotope effect on divertor plasma detachment in JET Ohmic discharges

Nuclear Materials and Energy, 2020
Experiments in JET-ILW Ohmic confinement mode plasmas show that the line-averaged detachment onset density in deuterium discharges is approx. 10% lower than in hydrogen discharges.
V. Solokha, M. Groth, S. Brezinsek, M. Brix, G. Corrigan, C. Guillemaut, D. Harting, S. Jachmich, U. Kruezi, S. Marsen, S. Wiesen   +10 more
doaj   +2 more sources

Spectroscopic investigations of divertor detachment in TCV [PDF]

Nuclear Materials and Energy, 2017
The aim of this work is to provide an understanding of detachment at TCV with emphasis on analysis of the Balmer line emission. A new Divertor Spectroscopy System has been developed for this purpose. Further development of Balmer line analysis techniques has allowed detailed information to be extracted from the three-body recombination contribution to ...
Bruce Lipschultz, Umar Sheikh, Roberto Maurizio   +2 more
exaly   +7 more sources

Evaluation of ITER divertor shunts as a synthetic diagnostic for detachment control [PDF]

Nuclear Fusion, 2023
Reliable diagnostics that measure the detached state of the ITER divertor plasma will be necessary to control heat flux to the divertor targets during steady state, burning plasma operation. This paper conducts an initial exploration into the feasibility
C.A. Orrico, T. Ravensbergen, R.A. Pitts, X. Bonnin, E. Kaveeva, J.S. Park, V. Rozhansky, I. Senichenkov, C. Watts, M. de Baar   +9 more
doaj   +2 more sources

Modeling detachment physics in the NSTX snowflake divertor [PDF]

Journal of Nuclear Materials, 2015
Abstract The snowflake divertor is a proposed technique for coping with the tokamak power exhaust problem in next-step experiments and eventually reactors, where extreme power fluxes to material surfaces represent a leading technological and physics challenge.
Meier, E.T., Soukhanovskii, V.A., Bell, R.E., Diallo, A., Kaita, R., LeBlanc, B.P., McLean, A.G., Podestà, M., Rognlien, T.D., Scotti, F.   +9 more
openaire   +2 more sources