Non-dimensional confinement scaling in similar negative triangularity plasmas on the DIII-D and TCV tokamaks
Plasma Physics
2026-03-16 v1
Abstract
Similarity experiments were performed on the DIII-D and TCV tokamaks to explore the scaling of energy confinement in negative triangularity plasmas using non-dimensional variables. Near up-down symmetric plasmas with large top-bottom averaged negative triangularity were created in a lower single null configuration, with the shape of the separatrix being closely matched between the two devices. The normalized energy confinement is found to weakly improve at increasing collisionality and, between the two devices, shows a machine size scaling behavior between Bohm and gyro-Bohm. Engineering scaling on a large DIII-D dataset is in agreement with the non-dimensional experiment.
Cite
@article{arxiv.2603.12494,
title = {Non-dimensional confinement scaling in similar negative triangularity plasmas on the DIII-D and TCV tokamaks},
author = {A. Marinoni and C. Chrystal and S. Coda and R. Coosemans and C. Marini and M. Podesta and O. Sauter and M. Agostini and M. E. Austin and E. Belli and J. Candy and M. Gorelenkova and D. Hamm and A. W. Hyatt and M. Knolker and M. La Matina and P. Lunia and S. Mordijck and A. O. Nelson and T. H. Osborne and C. Paz-Soldan and L. Porte and U. Sheikh and F. Scotti and K. E. Thome and M. Van Zeeland and the DIII-D and TCV Teams},
journal= {arXiv preprint arXiv:2603.12494},
year = {2026}
}