Radio Frequency Power In Plasmas: 17th Tropical Conference on Radio Frequency Power in Plasmas, Clearwater, Florida, 7-9 May 2007

by Ryan, Philip M.; Rasmussen, David A.

• ISBN13: 9780735404441
• ISBN10: 0735404445
• Format: Hardcover
• Copyright: 2008-02-28
• Publisher: Amer Inst of Physics

Summary

This conference was mainly devoted to the application of RF power at frequencies ranging from the tens of MHZ to hundreds of GHz, to fusion plasmas. Design of RF heating and current drive systems for ITER, along with equipment development, was an important topic. The application of RF to stabilize plasma instabilities was increasingly emphasized and progress in the theory of waves and wave-particle interactions in plasmas, and code development on these issues was presented.

Table of Contents

Preface	p. xv
RF Power in Plasmas: Overview
RF Heating and Current Drive in Magnetically Confined Plasma: A Historical Perspective (Review)	p. 3
Recent Advances of RF Systems for Magnetic Fusion (Review)	p. 13
RF Heating Needs and Plans for ITER (Invited)	p. 25
Ion Cyclotron Range of Frequencies
Modification of Sawtooth Oscillations with ICRF Waves in the JET Tokamak (Invited)
ICRH of JET and LHD Majority Ions at Their Fundamental Cyclotron Frequency
Improved Break-in-Slope Analysis for the Estimation of Power Deposition Profiles in JET	p. 47
D Majority Heating in JET Plasmas: ICRH Modelling and Experimental RF Deposition	p. 51
Coupling of the JET ICRF Antennas in ELMy H-Mode Plasmas with ITER Relevant Plasma-Straps Distance
Toroidal Rotation in RF Heated JET Plasmas	p. 59
Recent Experimental Results and Modeling of RF Heating of ([superscript 3]He)-D JET Plasmas: RF as a Tool to Study Transport	p. 63
Predictive Analysis of High Power ICRF Heating in JET	p. 67
ICRF Mode Conversion Heating and Long-Pulse Discharges in LHD	p. 71
ICRF Performance with Metallic Plasma Facing Components in Alcator C-Mod (Invited)	p. 75
Tungsten Sputtering during ICRF in ASDEX Upgrade	p. 83
Mode Conversion Current Drive Studies on Alcator C-Mod	p. 87
ICRF Heating with [omega] < [omega subscript ci] in Alcator C-Mod	p. 91
Effect of Energetic Trapped Particles Produced by ICRF Wave Heating on Sawtooth Instability in the DIII-D Tokamak	p. 95
Analysis of ICRF-Accelerated Ions in ASDEX Upgrade	p. 99
Toroidal Rotation in ICRF Only Heated ASDEX Upgrade Plasmas with Low Momentum Input	p. 103
HHFW Heating Efficiency on NSTX versus B[subscript Phi] and Antenna k[subscript double vertical line]	p. 107
Stochastic RF Heating of Thermal Ions	p. 111
RF Plasma Production in Uragan-2M Torsatron	p. 115
The Tore Supra ITER-Like ICRF Antenna Prototype (Invited)	p. 119
ITER-Like Antenna Electrical Performance	p. 127
Report on the Commissioning of the JET-EP ITER-Like ICRH Antenna	p. 131
RF Measurements and Modeling from the JET ITER-Like Antenna Testing	p. 135
Influence of Mutual Coupling between ICRH Antenna Straps on the Load Resilience of Hybrid Couplers	p. 139
Hybrid Couplers on the JET ICRF System: Commissioning and First Results on ELMs	p. 143
Recent Developments in the External Conjugate-T Matching Project at JET	p. 147
Voltage Node Arcing in the ICRH Antenna Vacuum Transmission Lines at JET	p. 151
Mechanical Design Proposal of an Ions Cyclotron Resonant Heating Antenna for ITER	p. 155
Status of the ITER ICRF System Design - 'Externally Matched' Approach	p. 159
Study of the Load Resilient External Matching Circuit for the ITER ICRH/FWCD System by Means of Its Mock-Up	p. 163
Benchmark Simulations of ICRF Antenna Coupling	p. 167
The Analysis of Complex Antenna Structures (Like the ITER Array) Using TOPICA	p. 171
Simulations of Different Faraday Screen Configurations for the ITER ICRH Antenna	p. 175
A Feasibility Study on a Load Resilient Antenna for the KSTAR ICRF Heating System	p. 179
Modeling of the EAST ICRF Antenna with ICANT Code	p. 183
Fast Ferrite ICRF Matching System on Alcator C-Mod	p. 187
A Method of Tuning Resonant Loops	p. 191
Study of RF Breakdown Mechanisms Relevant to an ICH Antenna Environment (Invited)	p. 195
Comparison of Different Arc Detection Methods during Plasma Operations with ICRF Heating on ASDEX Upgrade	p. 203
Assessment of the RF Field and Current Levels on the ITER Blanket Modules and of Possible Grounding Solutions for the ICRF Antenna	p. 207
Progress in Arc Safety System Based on Harmonics Detection for ICRH Antennae	p. 211
RF-Sheath Assessment of ICRF Faraday Screens	p. 215
Modeling of DC Potential Structures Induced by RF Sheaths with Transverse Currents in Front of ICRF Antenna	p. 219
Far Field Sheaths Due to Fast Waves Incident on Material Boundaries	p. 223
Lower Hybrid Range of Frequencies
Control of Current Profile and Instability by Radiofrequency Wave Injection in JT-60U and Its Applicability in JT-60SA (Invited)	p. 229
RF Coupling and Antenna Heat Load Control for Combined LHCD and ICRH in Tore Supra (Invited)	p. 237
Status of the Tore Supra CIMES Project	p. 245
Overview of Recent Results on Heating and Current Drive in JET (Invited)	p. 249
LH Wave Coupling and ICRF Sheaths at JET	p. 257
LH Wave Coupling over ITER-Like Distances at JET	p. 261
Lower Hybrid Current Drive in Experiments for Transport Barriers at High [beta subscript N] of JET (Joint European Torus)	p. 265
Lower Hybrid Current Drive Experiments in Alcator C-Mod (Invited)	p. 269
Lower Hybrid Coupling Experiments on Alcator C-Mod	p. 277
Measurements and Modeling of X-Ray and ECE Spectra during LHCD Experiments on Alcator C-Mod	p. 281
Full-Wave Electromagnetic Field Simulations of Lower Hybrid Waves in Tokamaks	p. 285
Scattering from Edge Density Fluctuations on the Lower Hybrid Waves in FTU	p. 289
Advanced Lower Hybrid Current Drive Modeling	p. 293
Full-Wave Simulations of LH Wave Propagation in Toroidal Plasma with Non-Maxwellian Electron Distributions	p. 297
TOPLHA: An Accurate and Efficient Numerical Tool for Analysis and Design of LH Antennas	p. 301
Simulations of LH Coupling in the Madison Symmetric Torus Reversed Field Pinch	p. 305
Validating the Lower Hybrid Interdigital-Line Antenna on MST	p. 309
Diagnosis of Lower Hybrid on MST	p. 313
LHCD Scenarios for Spherical Tokamak Plasmas	p. 317
Electron Bernstein Range of Frequencies
Electron Bernstein Wave Studies in MAST (Invited)	p. 323
Electron Bernstein Wave Research on NSTX and PEGASUS (Invited)	p. 331
Plans for Electron Bernstein Wave and Electron Cyclotron Heating in NSTX	p. 339
Simulation of EBW Heating in WEGA	p. 343
Electron Bernstein Wave Experiment on the Madison Symmetric Torus	p. 347
The Electron Bernstein Waves Heating Project in the TJ-II Stellarator	p. 351
Harmonic Generation in EBW Injection into Plasmas	p. 355
Electron Cyclotron Range of Frequencies
Stabilization of Neoclassical Tearing Modes in Tokamaks by Radio Frequency Current Drive (Review)	p. 361
Increasing NTM Stabilization Efficiency Using Modulated ECCD in ASDEX Upgrade (Invited)	p. 369
ECH Experiments Aiming at Further Advanced Operations in LHD (Invited)	p. 377
Vertical Launch Third Harmonic Electron Cyclotron Resonance Heating of H-Mode on TCV and Access to Quasi-Stationary ELM-Free H-Mode (Invited)	p. 385
Modeling of Time-Dependent Radial Transport of Electron Distribution Perturbations Caused by ECCD in DIII-D	p. 393
Electron Cyclotron Current Drive at High Electron Temperature on DIII-D	p. 397
Sawtooth Control with ECCD on Tore Supra	p. 401
Demonstration of Steady State Operation with 1MW of 170GHz Gyrotron for ITER (Invited)	p. 405
Design of Electron Cyclotron Heating and Current Drive System of ITER	p. 413
The Enhanced Performance Launcher Design for the ITER Upper Port ECH Antenna	p. 417
The W7-X ECRH Plant: Recent Achievements
Upgrade of the TH1506B 118 GHz Gyrotron Using Modelling Tools	p. 425
Second Harmonic Breakdown in KSTAR	p. 429
RF Theory and Modeling
Physics Research in the SciDAC Center for Wave-Plasma Interactions (Invited)	p. 435
Quasilinear Evolution of Multiple Non-Thermal Ion Distributions in ICRF Heating	p. 443
Time-Dependent Modeling of Nonlinear Plasma Response to Fast Waves with Multiple Damping Mechanisms	p. 447
Extended Budden Problem Associated with an Energetic-Particle Population	p. 451
Effects of ICRH on the Dynamics of Fast Particle Excited Alfven Eigenmodes	p. 455
Full-Wave Modeling of ICRF Waves: Global and Quasi-Local Descriptions	p. 459
A New Normal Form for Multidimensional Mode Conversion	p. 463
Higher Order Corrections to Resonant Mode Conversion	p. 467
Gyrocenter Gauge Theory and Algorithm for Nonlinear Particle Simulations of Radio-Frequency Waves in Plasmas	p. 471
High Frequency Gyrokinetic Particle-in-Cell Simulation: Application to Heating of Magnetically Confined Plasmas	p. 475
Towards a Predictive Model of Power Loss from Parametric Decay of ICRF Waves	p. 479
Three-D Complex-Geometry Semi-Implicit Finite-Difference Time-Domain Simulation of Edge Plasma at RF Time-Scales	p. 483
PIC Modeling of Collisional Skin Depth in RF-Driven Atmospheric Pressure Plasmas	p. 487
RF Plasma Applications
A Negative Hydrogen-Ion Source for SNS Using a Helicon Plasma Generator	p. 493
Microwave Excitation in ECRIS Plasmas	p. 497
Accurate Design of ICRF Antennas for RF Plasma Thruster Acceleration Units with TOPICA	p. 501
Rocket Propulsion through Multiply-Charged Ions from a Mirror Plasma	p. 505
Strong RF Heating in a Mirror during Plasma Build-Up	p. 509
Possibilities of Phased Array Antenna (PAA) for Fusion	p. 513
Analysis of the Heating of the Magnum-PSI and Pilot-PSI Plasma in the GHz Range	p. 517
Author Index	p. 521
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