Validation of the ITER-relevant passive-active-multijunction LHCD launcher on long pulses in Tore Supra
Authors:
- A. EkedahlAEA. Ekedahl
- L. DelpechLDL. Delpech
- M. GonicheMGM. Goniche
- D. GuilhemDGD. Guilhem
- J. HillairetJHJ. Hillairet
- M. PreynasMPM. Preynas
- P.K. SharmaPSP.K. Sharma
- J. AchardJAJ. Achard
- Y.S. BaeYBY.S. Bae
- X. BaiXBX. Bai
- C. BalorinCBC. Balorin
- Y. BaranovYBY. Baranov
- 30 September 2010
- journal article
- research article
- Published by IOP Publishing in Nuclear Fusion
- Vol. 50 (11)
Abstract
A new ITER-relevant lower hybrid current drive (LHCD) launcher, based on the passive-active-multijunction (PAM) concept, was brought into operation on the Tore Supra tokamak in autumn 2009. The PAM launcher concept was designed in view of ITER to allow efficient cooling of the waveguides, as required for long pulse operation. In addition, it offers low power reflection close to the cut-off density, which is very attractive for ITER, where the large distance between the plasma and the wall may bring the density in front of the launcher to low values. The first experimental campaign on Tore Supra has shown extremely encouraging results in terms of reflected power level and power handling. Power reflection coefficient −2, i.e. its design value at f = 3.7 GHz. In addition, 2.7 MW has been coupled at a plasma–launcher distance of 10 cm, with a power reflection coefficient <2%. Finally, full non-inductive discharges have been sustained for 50 s with the PAM.Keywords
This publication has 20 references indexed in Scilit:
- Critical Threshold Behavior for Steady-State Internal Transport Barriers in Burning PlasmasPhysical Review Letters, 2008
- Chapter 6: Steady state operationNuclear Fusion, 2007
- Progress in LHCD: a tool for advanced regimes on ITERPlasma Physics and Controlled Fusion, 2005
- Toward a LHCD system for ITERFusion Engineering and Design, 2005
- Recent fully non-inductive operation results in Tore Supra with 6 min, 1 GJ plasma dischargesNuclear Fusion, 2004
- Lower Hybrid Current Drive: An Overview of Simulation Models, Benchmarking with Experiment, and Predictions for Future DevicesAIP Conference Proceedings, 2003
- Status of Lower Hybrid Current DeriveAIP Conference Proceedings, 1999
- Conceptual study of a reflector waveguide array for launching lower hybrid waves in reactor grade plasmasNuclear Fusion, 1995
- Lower-Hybrid Current Drive in the PLT TokamakPhysical Review Letters, 1982
- Experimental Observation of the rf-Driven Current by the Lower-Hybrid Wave in a TokamakPhysical Review Letters, 1980