Influence of various physics phenomena on fast wave current drive in tokamaks

Jaeger, E. F.; Batchelor, D. B.; Stallings, D. C.

doi:10.1088/0029-5515/33/2/i01

Cited by 42 publications

(39 citation statements)

References 17 publications

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“…General information about waves in plasmas can be found in Swanson's book (Swanson 2003) and Stix's book (Stix 1992); and the required Physics background on waves for heating plasmas and the early history of wave heating are available in (Cairns 1991). Reviews of electron cyclotron waves can be found in (Bornatici et al 1983), of lower-hybrid wave in (Bonoli 1985), and of ion cyclotron wave in (Jaeger et al 1993;Fuchs et al 1995;Wilson & Bonoli 2015). Having in mind the main elements of wave propagation and damping mechanisms, as well as the requirements for the ITER heating (Poli et al 2014), the method for modelling heating systems and the last physical phenomena to take in account following new experimental evidences will be presented.…”

Section: General Considerations On Wave Propagation For Plasmamentioning

confidence: 99%

Simulation as a tool to improve wave heating in fusion plasmas

et al. 2015

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(Received ?; revised ?; accepted ?. -To be entered by editorial office)Firstly, a brief overview will be given on different models that are able to describe the behaviour of wave propagation as a function of specific frequency ranges. Each range corresponds to different heating systems, namely, 20-100 MHz for the Ion Cyclotron Resonant Heating (ICRH), 2-20 GHz for Lower Hybrid Heating or Current Drive (LHCD), and 100-250 GHz for Electron Cyclotron Resonant Heating (ERCH) or Current Drive (ECCD) systems. Every systems' specifications will be explained in detail, including the typical set of equations and the assumptions needed to describe the properties of these heating or current drive systems, as well as their specific domains of validity. In these descriptions, special attention will be paid to the boundary conditions. A review about specific physical problems associated with the wave heating systems will also be provided. Such review will detail the role of simulation in answering questions coming from experiments on magnetized plasma devices devoted to Fusion. A few examples which will be covered are the impact of edge turbulence on wave propagation and its consequences on the heating system performances, effects of the fast particles, ponderomotive effects, among others. A study that is more focused on Radio Frequency (RF) sheath effects will also be discussed. It shows that such simulations require very sophisticated tools to gain a partial understanding of the observations undertaken in dedicated experiments. To conclude this review, an overview will be given about the requirements and progress necessary to obtain relevant predictive simulation tools able to describe the wave heating systems used in fusion devices.

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Section: General Considerations On Wave Propagation For Plasmamentioning

confidence: 99%

Simulation as a tool to improve wave heating in fusion plasmas

et al. 2015

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“…To separate the fast waxe driven current from the other (4 Current 7 150 .... Figure 3 shows the experimentally determined rf driven current profile for 1.4 MW of injected rf power. Figure 3 also shows predictions from a model based on the ergodic limit of weakly damped rays (FASTCD) [6], a ray tracing code with multiple reflections ( C U~Y ) [7], and the results from full wave code (PICES) [8]. The experimentally determined non-inductive current profile due to FWCD and theoretical predictions from stochastic limit model and full wave code.…”

Section: Experimentally Determined Profiles Of Fast Wave Current Drivmentioning

confidence: 99%

Experimentally determined profiles of fast wave current drive on DIII-D

Forest¹,

Petty²,

Baity³

et al. 1996

AIP Conference Proceedings

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“…The final match is made to a plasma impedance matrix which is generated by PLASMAIMP [7] or GLOSI[ 81 . RANT3D can also use its field solutions at the plasma interface as input to PICES [9], a 3D full wave plasma code used to calculate the detailed rf interaction with the target plasma.…”

Section: Numerical Codes Presently In Use At Ornlmentioning

confidence: 99%

Integrated design and analysis of RF heating and current drive systems

Ryan¹,

Carter²,

Goulding³

et al. 1996

AIP Conference Proceedings

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Abstract. The design, analysis, and performance evaluation of rf power systems ultimately requires accurate modeling of a chain of subsystems starting with the rf transmitter and ending with the power absorption in the plasma. A collection of computer codes is used at ORNL to calculate the plasma loading and wave spectrum for a threedimensional rf antenna, the transmissiodreflection properties of the Faraday shield and its effect on the electrical characteristics and phase velocity of the antenna, the internal coupling among antenna array components and the incorporation of the antenna array into a transmission line model of the phase control, tuning, matching, and power distribution system. Some codes and techniques are more suited for the rapid evaluation of system design progressions, while others are more applicable to the detailed analysis of final designs or existing hardware. The interaction of codes and the accuracy of calculations will be illustrated by the process of determining the plasma loading as a function of phasing and density profiles for the TFTR ICRH antennas and comparing the results to measurements. An example of modeling a complex antenna geometry will be the comparison of calculations with the measured electrical response of a four-strap mockup of the JET A2 antenna array which was loaned to ORNL by the JET ICRH team.

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Influence of various physics phenomena on fast wave current drive in tokamaks

Cited by 42 publications

References 17 publications

Simulation as a tool to improve wave heating in fusion plasmas

Simulation as a tool to improve wave heating in fusion plasmas

Experimentally determined profiles of fast wave current drive on DIII-D

Integrated design and analysis of RF heating and current drive systems

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