Stray RF Power Estimates From EC Exploitation During ITER Plasma Operations

Journal Article · Fri Dec 23 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3664955· OSTI ID:21612475

Gandini, F; Henderson, M; Darbos, C; Gassmann, T; Purohit, D; Omori, T ^[1]; Nazare, C ^[2]

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1. ITER Organization, Route de Vinon sur Verdon, 13115 Saint Paul Lez Durance (France)
2. Assystem Facilities, 78067 Saint Quentin en Yvelines Cedex (France)

The EC H and CD system of ITER tokamak is an essential tool for all the phases of ITER operation. Different levels of EC power are required through all the plasma discharge: up to 6.7 MW for assisting the breakdown and burn through, up to 20 MW for current drive and saw-teeth control from the equatorial launcher and up to 20 MW for NTM stabilization from the upper launchers. The assistance to breakdown and burn through is characterized by a very low (if not negligible) RF power absorption by the plasma. A significant level of stray radiation may also arise from partial absorption due to non-optimal plasma parameters and/or wrong injected polarization. The stray power radiated in the vacuum chamber is estimated as a first step toward mitigating potential harmful consequence to in-vessel structures and diagnostics. Power loading of the chamber walls (peek power and average power density for straight beam propagation in the empty chamber) and diffuse stray radiation effects are simulated to infer suitable strategies to avoid damage to first wall and to microwave sensitive components.

• OSTI ID: 21612475
• Journal Information: AIP Conference Proceedings, Vol. 1406, Issue 1; Conference: 9. topical conference on radio frequency power in plasmas, Newport (United States), 1-3 Jun 2011; Other Information: DOI: 10.1063/1.3664955; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION
BREAKDOWN
COMPUTERIZED SIMULATION
CURRENT-DRIVE HEATING
ECR CURRENT DRIVE
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
FIRST WALL
ITER TOKAMAK
MICROWAVE RADIATION
OPERATION
PLASMA
PLASMA POTENTIAL
PLASMA SIMULATION
POLARIZATION
POWER DENSITY
RF SYSTEMS
STRAY RADIATION
TEARING INSTABILITY
CLOSED PLASMA DEVICES
CURRENTS
ELECTRIC HEATING
ELECTRIC POTENTIAL
ELECTROMAGNETIC RADIATION
HEATING
INSTABILITY
JOULE HEATING
NON-INDUCTIVE CURRENT DRIVE
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RADIATIONS
SIMULATION
SORPTION
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTOR WALLS
THERMONUCLEAR REACTORS
TOKAMAK DEVICES
TOKAMAK TYPE REACTORS