Driven Rotation, Self-Generated Flow, and Momentum Transport in Tokamak Plasmas

ISBN-13: 9783030922689 / Angielski / Miękka / 2023 / 150 str.

John Rice

Opis

This book provides a comprehensive look at the state of the art of externally driven and self-generated rotation as well as momentum transport in tokamak plasmas. In addition to recent developments, the book includes a review of rotation measurement techniques, measurements of directly and indirectly driven rotation, momentum sinks, self-generated flow, and momentum transport. These results are presented alongside summaries of prevailing theory and are compared to predictions, bringing together both experimental and theoretical perspectives for a broad look at the field. Both researchers and graduate students in the field of plasma physics will find this book to be a useful reference. Although there is an emphasis on tokamaks, a number of the concepts are also relevant to other configurations.

Spis treści

1 Introduction

 2 Velocity measurements in tokamaks

                2.1 Doppler shifts

                                2.1.1 Passive

                                2.1.2 Active

                2.2 Mode rotation

 3 Momentum Sources

                3.1 Direct rotation drive

                                3.1.1 Neutral beam injection

                                3.1.2 Ion cyclotron range of frequencies waves

                                3.1.3 Lower hybrid waves

                                3.1.4 Electron cyclotron waves

                                3.1.5 Miscellaneous

                3.2 Indirect rotation drive

                                3.2.1 Orbit shift jxB forces

                                3.2.2 Fast ion and electron loss due to toroidal magnetic field ripple

                                3.2.3 Edge thermal ion orbit loss

 4 Momentum sinks

                4.1 Neutral damping

                4.2 Locked modes, magnetic braking and neo-classical toroidal viscosity

                4.3 Edge localized modes

 5 Comparison with neo-classical theory

                5.1 Poloidal rotation

                5.2 Toroidal rotation

                5.3 Poloidal asymmetries

 6 Residual stress

                6.1 Enhanced confinement regimes

                                6.1.1 Ohmic high confinement mode

                                6.1.2 ICRF high and improved confinement modes

                                6.1.3 ECH high confinement modes

                                6.1.4 High confinement modes with LH

                                6.1.5 NBI high confinement modes

                                6.1.6 Plasmas with internal transport barriers

                6.2 Low confinement mode

                                6.2.1 Magnetic configurations

                                6.2.2 Rotation reversals

                                6.2.3 Auxiliary heated low confinement mode

                                6.2.4 Current driven reversals

 7 Momentum transport

                7.1 Momentum diffusivity

                7.2 Momentum pinch

                7.3 Residual stress

 8 Discussion and future outlook

O autorze

John Rice is Senior Research Scientist at the Plasma Science and Research Center, MIT.  Areas of interest include intrinsic rotation, internal transport barrier formation, momentum, impurity and energy transport, and spectroscopy of medium and high Z impurities in magnetic confinement devices. Has authored over 150 refereed journal articles, with 48 as first author. Paper “Inter-Machine Comparison of Intrinsic Toroidal Rotation in Tokamaks”, J.E.Rice et al., Nucl. Fusion 47, 1618 (2007) won the 2010 Nuclear Fusion Journal Prize. Has served on the Ph.D. committees for 9 graduate students, and has supervised 20 M.I.T. undergraduate theses. Has been an APS Fellow since 2006 and the former Chair of the US Transport Task Force, has served on the executive committees for Atomic Processes in Plasmas, and High Temperature Plasma Diagnostics, and has been an official US member of the ITPA Transport and Confinement Group since 2001.