The anomalous Doppler instability during lower-hybrid current drive

PFC / JA - 86 - 18 The Anomalous Doppler Instability During Lower - Hybrid Current Drive

Electron current drive by fusion-product-excited lower hybrid drift instability.

We present first principles simulations of the direct collisionless coupling of the free energy of fusion-born ions into electron current in a magnetically confined fusion plasma. These simulations demonstrate, for the first time, a key building block of some "alpha channeling" scenarios for tokamak experiments. Spontaneously excited obliquely propagating waves in the lower hybrid frequency ran...

A Lower Hybrid Current Drive System for ITER

A 20 MW/5GHz Lower Hybrid Current Drive (LHCD) system was initially due to be commissioned and used for the second mission of ITER, i.e. the Q=5 steady state target. Though not part of currently planned procurement phase, it is now under consideration for an earlier delivery. In this paper, both physics and technology conceptual designs are reviewed. Furthermore, an appropriate work plan is als...

Benchmarking of Lower Hybrid Current Drive Codes with Application to

This paper discusses the results of a benchmark exercise in which the predictions of several simulation models for lower hybrid current drive (LHCD) were compared using parameters typical of the steady state operating scenario in the ITER device (the so-called Scenario 4). The most complete LHCD simulation models that were used combined 2D velocity space Fokker Planck solvers with toroidal ray ...

Fast Electron Transport In Lower - Hybrid Current Drive

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