The 3-strap antennas in ASDEX Upgrade allow ICRF operation with low tungsten (W) content in the confined plasma with W-coated antenna limiters. With the 3-strap antenna configuration, the local W impurity source at the antenna is drastically reduced and the core W concentration is similar to that of the boron coated 2-strap antenna at a given ICRF power. Operation of the 3-strap antennas with the power ratio between the central and the outer straps of 1.5 : 1 and 2 : 1 is adopted to minimize the ICRF-specific W release. © 2016 EURATOM Printed in the UK.

First results with 3-strap ICRF antennas in ASDEX Upgrade

Tudisco, O.;Tuccillo, A.
2016

Abstract

The 3-strap antennas in ASDEX Upgrade allow ICRF operation with low tungsten (W) content in the confined plasma with W-coated antenna limiters. With the 3-strap antenna configuration, the local W impurity source at the antenna is drastically reduced and the core W concentration is similar to that of the boron coated 2-strap antenna at a given ICRF power. Operation of the 3-strap antennas with the power ratio between the central and the outer straps of 1.5 : 1 and 2 : 1 is adopted to minimize the ICRF-specific W release. © 2016 EURATOM Printed in the UK.
3-strap;ASDEX Upgrade;tungsten;impurity;RF sheath;ICRF
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/20.500.12079/637
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