@article{c56501d6090443f797942cde03e077c6,
title = "Optimizing the Super H-mode pedestal to improve performance and facilitate divertor integration",
abstract = "Access to Super H-mode is demonstrated for moderately shaped plasmas in agreement with EPED [Snyder et al., Phys. Plasmas 16, 056118 (2009)] predictions. In particular, Super H-mode is realized in a DIII-D shape that is accessible to the JET tokamak. The reduced triangularity of the JET-compatible shape compared to previous Super H-mode plasma shapes does not prevent deep ascension into the so-called Super H-mode {"}channel.{"}Operationally, access is enabled and optimized by delaying the neutral beam power injection and, thus, protracting the L-H transition. In highly shaped DIII-D plasmas, the injection of nitrogen sufficient for the establishment of a radiative divertor is shown to be possible during Super H-mode without pedestal degradation. Due to its increased stored energy and radiative divertor integration capabilities, Super H-mode is a promising candidate as operating regime for JET, ITER, and future fusion reactors.",
author = "M. Knolker and Snyder, {P. B.} and Evans, {T. E.} and T. Wilks and D. Eldon and B. Grierson and Aaro J{\"a}rvinen and X. Jian and F. Laggner and J. McClenaghan and McLean, {A. G.} and T. Osborne and C. Paz-Soldan and F. Scotti and W. Solomon",
note = "Funding Information: This research was supported by the General Atomics Postgraduate Research Participation Program administered by ORAU. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences, using the DIII-D National Fusion Facility, a DOE Office of Science user facility, under Award Nos. DE-FC02–04ER54698, DE-AC02–09CH11466, DE-AC52–07NA27344, DE-SC0018030, and DE-SC0018287. Part of the data analysis was performed using the OMFIT integrated modeling framework.41 We gratefully acknowledge the support of the DIII-D Team for tokamak, auxiliary heating, and diagnostic systems operation. In particular, deep gratitude is owed to the operators and installers of the new Thomson Scattering diagnostic for the divertor region, Fenton Glass and Tom Carlstom. Moreover, we thank Colin Chrystal for the excellent CER data analysis as well as Max Fenstermacher and Jeff Herfindal who provided the Tangential TV data and effective charge from the visible Bremsstrahlung, respectively. We also wish to thank Andrea Garofalo and Craig Petty for stimulating discussions. Publisher Copyright: {\textcopyright} 2020 Author(s).",
year = "2020",
month = oct,
doi = "10.1063/5.0011008",
language = "English",
volume = "27",
journal = "Physics of Plasmas",
issn = "1070-664X",
publisher = "American Institute of Physics (AIP)",
number = "10",
}
