Structural design of ferritic steel tiles for ripple reduction of toroidal magnetic field in JT-60U

Kudo-Shibama, Yusuke; Arai, Takashi; Miyo, Y.; Sawai, Tetsuo; Sakurai, S.; Masaki, K.; Suzuki, Yutaka; Jitsukawa, Shiro; Miya, N.

doi:10.1016/j.fusengdes.2007.03.055

Cited by 2 publications

(1 citation statement)

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“…The existing stud nuts for fixing armours were reinforced, and hightension bolts were used in order to avoid a large modification of the existing equipment installed under armours. The inlay structure between a plate, a base and a reinforced stud nut was also applied to reduce the large load to a bolt in the poloidal direction [15].…”

Section: Ferritic Insertion To Improve Energetic Ion Confinement In L...mentioning

confidence: 99%

Ferritic insertion for reduction of toroidal magnetic field ripple on JT-60U

et al. 2007

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Ferritic steel tiles (FSTs) have been installed to improve the energetic ion confinement by reducing a toroidal magnetic field ripple. Aiming at cost-effective installation, orbit-following calculations of energetic ions were carried out for a design of the installation of ferritic steel on the JT-60U by using the fully three dimensional magnetic field orbit-following Monte-Carlo (F3D OFMC) code, which had been developed for ferritic insert experiments on the JFT-2M and can treat the complex magnetic field structure produced by ferritic inserts. The installed FSTs add a non-linear magnetic field on magnetic sensors for plasma control and an equilibrium calculation. The code for real-time control has been modified to take into account the magnetic field by the FSTs. The plasma operation was successfully resumed after usual conditioning processes and real-time plasma control was successfully carried out. The heat load measurement indicates the improved confinement of energetic ions. These results are important for practical application of the ferritic steel, which is a leading candidate of a structural material on a DEMO reactor.

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Section: Ferritic Insertion To Improve Energetic Ion Confinement In L...mentioning

confidence: 99%