The ITER TF coil ripple: Evaluation of ripple attenuation using Fe insert and of ripple enhancement produced by TBM

Portone, A.; Roccella, M.; Roccella, R.; Lucca, F.; Ramogida, G.

doi:10.1016/j.fusengdes.2008.08.042

Cited by 18 publications

(12 citation statements)

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“…The simplified configuration of FIs and TBMs has been carefully deduced from the appropriate consideration of filling factors evaluated from B-H curves of F82H and SS430. Similar methods have been also reported in the previous studies [13].…”

Section: D Modeling Of Tbm and Ferromagnetic Insertsupporting

confidence: 80%

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R&D activities on helium cooled solid breeder TBM in Korea

Cho

Ahn

et al. 2010

Fusion Engineering and Design

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Section: D Modeling Of Tbm and Ferromagnetic Insertsupporting

confidence: 80%

“…Each FI block is toroidally separated by 20 • and modeled as a gapless stack of uniform ferromagnetic slabs. The number of FI slabs is the same as that in other study [13].…”

Section: D Modeling Of Tbm and Ferromagnetic Insertmentioning

confidence: 99%

R&D activities on helium cooled solid breeder TBM in Korea

Cho

Ahn

et al. 2010

Fusion Engineering and Design

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“…1,2 Ferritic materials having non-negligible magnetic permeabilities have begun to see use since they offer several benefits to tokamak operation. Installing ferritic tiles can reduce toroidal field ripple, 3 allowing better confinement of energetic particles, which is especially important for a reactor. Because ferritic steels offer radiation hardness to high energy neutrons, 4 ferritic materials will be used in tests of breeding blanket modules.…”

Section: Introductionmentioning

confidence: 99%

Active and passive kink mode studies in a tokamak with a movable ferromagnetic walla)

et al. 2015

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High-resolution active and passive kink mode studies are conducted in a tokamak with an adjustable ferromagnetic wall near the plasma surface. Ferritic tiles made from 5.6 mm thick Hiperco V R 50 alloy have been mounted on the plasma-facing side of half of the in-vessel movable wall segments in the High Beta Tokamak-Extended Pulse device [D. A. Maurer et al., Plasma Phys. Controlled Fusion 53, 074016 (2011)] in order to explore ferritic resistive wall mode stability. Low-activation ferritic steels are a candidate for structural components of a fusion reactor, and these experiments examine MHD stability of plasmas with nearby ferromagnetic material. Plasma-wall separation for alternating ferritic and non-ferritic wall segments is adjusted between discharges without opening the vacuum vessel. Amplification of applied resonant magnetic perturbations and plasma disruptivity are observed to increase when the ferromagnetic wall is close to plasma surface instead of the standard stainless steel wall. Rapidly rotating m=n ¼ 3=1 external kink modes have higher growth rates with the nearby ferritic wall. Feedback suppression of kinks is still as effective as before the installation of ferritic material in vessel, in spite of increased mode growth rates. V C 2015 AIP Publishing LLC. [http://dx.

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“…Each TF coil carries a total current ITF ∼9.11 MA and the toroidal magnetic field at major radius R = 6.2 m of the machine is ∼5.3 T [1]. The discreteness of toroidal field coils(TFC) causes asymmetric perturbations of the toroidal magnetic field distribution, or the TF ripple (ı TF ), which definition is shown as [2]: …”

Section: Introductionmentioning

confidence: 99%

“…In ITER the approach to lower TF ripple generated by TBMs is being investigated to ensure safety operation of plasma, which is one of the most important objectives in electromagnetic testing of TBM. Although some analyses and assessments on reduction of TF ripple have been carried out with the intervention of FIs or optimized FIs and TBM, an accurate evaluation on reduction of TF ripple is still necessary and important to each TBM due to difference of structural design [2,6,7]. In this paper, based on optimization design of FIs in ITER and updated design of CN HCCB-TBM (China Helium Cooled Ceramic Breeder TBM), a detailed evaluation of TF ripple has been performed by establishing three-dimensional finite element model (FEM) of ANSYS code [8].…”

Section: Introductionmentioning

confidence: 99%