Kim, E., Asif, M. and Mohamed, M. (2016) Study of improved confinement by a stepwise increase of the input heating power for tokamak plasmas. Modern Physics Letters B, 30 (24). 1650316. ISSN 0217-9849
Abstract
This paper is an extension of the brief study by Sarah Douglas et al. [Phys. Plasmas 20 (2013) 114504] where in the study a sinusoidal perturbation of the heating power has been studied. In this paper a stepwise increase of the heating power and its influence on the L–H transition are studied. Using a function, A tanh(t/T) for the transition of input heating power for tokamak plasmas, i.e. the addition of the perturbation, A tanh(t/T), to constant power q0 is shown to promote the confinement, leading to the L–H transition at a lower value of q0, as compared to the case of constant q0 without the A tanh(t/T) perturbation. It is seen that the input heating power Q that consists of constant part q0 in addition to a function A tanh(t/T) provides the L–H transition for relatively small A and much wider range values of 1/T as compared to Sarah Douglas et al. [Phys. Plasmas 20 (2013) 114504].
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 World Scientific Publishing. This is an author produced version of a paper subsequently published in Modern Physics Letters B. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Perturbation; stepwise increase; heating power; L–H transition |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 28 Sep 2016 13:46 |
Last Modified: | 08 Sep 2017 00:06 |
Published Version: | http://dx.doi.org/10.1142/S0217984916503164 |
Status: | Published |
Publisher: | World Scientific Publishing |
Refereed: | Yes |
Identification Number: | 10.1142/S0217984916503164 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:105304 |