Prototyping of the Blanket Shield Module for the ITER EC H&amp;CD Upper launcher

Spaeh, P.; Aiello, G.; Binni, A.; Gessner, R.; Goldmann, Andrew; Grossetti, G.; Kroiss, A.; Meier, Andreas; Obermeier, C.; Scherer, T.; Schreck, S.; Strauß, D.; Vaccaro, A.

doi:10.1016/j.fusengdes.2014.04.056

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…The EC Upper Launcher is designed to the special needs of the mm-wave system requiring a wide open volume in the blanket region the EC Heating and Current Drive System. Further design drivers are maintenance [5] and manufacturing costs, here prototyping activities [6] in the past could be used to optimize the design. A new prototyping iteration [7] is currently ongoing integrating the latest design changes with a focus on BSM and FWP.…”

Section: Structural Systemmentioning

confidence: 99%

Nearing final design of the ITER EC H&CD Upper Launcher

Strauß

Aiello

Bertizzolo

et al. 2019

Fusion Engineering and Design

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The ITER ECRH system consists of 24 gyrotrons with up to 24 MW millimeter wave heating power at 170GHz, power supplies, control system, transmission lines, one Equatorial and the four Upper Launchers. With its high frequency and small beam focus the ECRH has the unique capability of driving locally current. While the Equatorial Launcher mainly acts for central heating and current profile shaping, the Upper Launchers aim on suppressing MHD instabilities, especially neoclassical tearing modes triggering plasma disruptions. The Upper Launchers inject millimeter waves through a quasi-optical section consisting of three fixed and the front steering mirror set. The eight overlapping beams have focal points optimized for suppression of the q=3/2 and q=2/1 NTMs. Several project change requests required the redesign of the Upper Launchers and the connected ex-vessel system. This redesign includes a new boundary geometry of the launchers as well as a newly designed cooling system for the Blanket Shield Module (BSM), a modified flange of the BSM to the structural main frame and a refined optical design. Additionally shield blocks with integrated in-vessel waveguides were added and the closure plate with waveguide and supply line feedthroughs was adapted. Further changes, not all caused by PCRs, include newly designed ex-vessel waveguide components with a reduced aperture and redesigned ultra low-loss CVD diamond windows. Finally several components originally foreseen as off-the-shelf components have become part of the design scope. The new launcher design status is presented with selected results on numerical design validation.

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Section: Structural Systemmentioning

confidence: 99%

Nearing final design of the ITER EC H&CD Upper Launcher

Strauß

Aiello

Bertizzolo

et al. 2019

Fusion Engineering and Design

Self Cite

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show abstract

“…The optimal toroidal injecting angles are all about 206° and the optimal poloidal injecting angles are about 83°, 88°, 94° and 98° respectively. EL is made up of in-vessel transmission lines (in-vessel transmission lines and ex-vessel transmission lines are separated by external surface of the flange), vacuum shielding, internal shield, focusing mirror, steering mirror, drive mechanisms of steering mirror, Blanket Shielding Module (BSM) [24], flange and so on ( Fig. 9 and Fig.…”

Section: Equatorial Launchermentioning

confidence: 99%

Conceptual design of CFETR ECRH equatorial launcher and upper launcher

et al. 2019

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The Electron Cyclotron Resonance Heating (ECRH) system of China Fusion Engineering Test Reactor (CFETR) is designed to inject 20 MW RF power into the plasma for heating and current drive (H&CD) applications. The ECRH system consists of 20 gyrotrons, the associated power supplies, the transmission lines and one launcher. In order to compare the launcher performance from equatorial and upper ports, two types of launcher are designed in this paper. In equatorial launcher (EL), twenty in-vessel transmission lines are divided into four groups. Every five gaussian beams from in-vessel transmission lines face one fixed focusing mirror and one steering mirror. All gaussian beams are injected into the plasma with optimal toroidal and poloidal angles calculated by C3PO/LUKE code. In upper launcher (UL), twenty-one transmission lines are supposed and divides into three groups. Every seven gaussian beams are injected into one fixed focusing mirrors and all twenty-one beams reflected to one common steering mirror finally. The optical transmission characteristics and the convergence information of gaussian beams are checked and optimized. The EL or UL is installed on the equatorial or upper port with a port-plug modular structure.

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Prototyping of the Blanket Shield Module for the ITER EC H&CD Upper launcher

Cited by 2 publications

References 6 publications

Nearing final design of the ITER EC H&CD Upper Launcher

Nearing final design of the ITER EC H&CD Upper Launcher

Conceptual design of CFETR ECRH equatorial launcher and upper launcher

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