Feeder components and instrumentation for the JT-60SA magnet system

Yoshida, Kiyoshi; Kizu, K.; Murakami, Haruyuki; Kamiya, Kōji; Honda, Akira; Ohnishi, Yoshihiro; Furukawa, Masato; Asakawa, Shuji; Kuramochi, M.; Kurihara, Kenichi

doi:10.1016/j.fusengdes.2012.12.010

Cited by 7 publications

(5 citation statements)

References 9 publications

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“…Due to the requirement on long pulse duration it is entirely superconducting, with 18 NbTi TF coils, six NbTi equilibrium field coils, and four Nb 3 Sn CS stacked modules. The TF (figures 4-6) is provided by a set of 18 coils, each wound from 72 turns (12 pancakes each with six turns) of a 22 × 26 mm 2 rectangularly shaped, steel-jacketed, NbTi, cable-in-conduit conductor (CICC) [8][9][10]. In each coil, the winding pack (WP) is housed in a stainless steel casing with two additional cooling channels to aid magnet cool-down.…”

Section: Magnet Systemmentioning

confidence: 99%

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Progress of the JT-60SA project

Barabaschi¹,

Kamada²,

Shirai³

2019

Nucl. Fusion

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The JT-60SA project was initiated in June 2007 under the framework of the Broader Approach Agreement and Japanese National Fusion Programme for an early realization of fusion energy by conducting supportive and complementary work for the ITER project towards supporting the basis for DEMO. With the project now in an advanced implementation stage, the early defined approach for its implementation has proven to be successful and hence continues to be employed. This is underpinned by the very close collaboration between QST in Japan, F4E in Europe, and all other European stakeholders: the EU Voluntary Contributors and EUROfusion. As of September 2018, the closure of the torus has been accomplished. All TF coils have been manufactured, tested at full current and cryogenic temperature demonstrating a consistent temperature margin, and assembled. All manufacturing of equilibrium field coils was completed by the middle of August 2016. Three central solenoid (CS) modules were completed by March 2017 while manufacturing of the last CS module has recently been completed. The manufacture and delivery of all 26 high temperature superconductor current leads was completed in November 2017. All large power systems, including the switching network units and super conducting magnet power supplies, have also been manufactured, delivered and with few residual commissioning activities still ongoing in Naka. With the cryostat base already in place since 2013, the cryostat vessel body cylindrical section has been manufactured, preassembled, measured and delivered to Naka. The full scope of the cryoplant, manufacturing and commissioning, is now successfully completed. The final assembly phase has therefore started together with the gradual execution of integrated commissioning leading to the completion of the assembly in March 2020 and a first plasma in September 2020. The efficient start-up and scientific exploitation of JT-60SA by the large international team is a challenging enterprise, which will be similar to, and provide important input to, the ITER start-up phase. To optimize this phase, a broad set of coordinated activities have been carried out over recent years by a joint Japanese-EU JT-60SA research unit, fully integrated in the integrated project team and liaising with the broader Japanese and EU fusion physics community. The paper will provide an overview of the progress of the manufacturing and assembly of the JT-60SA machine towards first plasma, and progress in preparing for the next phases of JT-60SA following this milestone.

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Section: Magnet Systemmentioning

confidence: 99%

“…In JT-60SA the 6 EF coils [9] and the four independentlycontrolled CS modules allow wide ranging and flexible control of the plasma shape. All EF coils (figure 9) manufacturing was completed by the middle of August 2016.…”

Section: Magnet Systemmentioning

confidence: 99%

Progress of the JT-60SA project

Barabaschi¹,

Kamada²,

Shirai³

2019

Nucl. Fusion

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“…Delivery of the final ten HTS-CLs to Japan is planned in 2017. Five coil terminal boxes (CTBs) for current feeding and eleven valve boxes (VBs) for helium feeding will be set up around the cryostat [28,29]. They contain HTS-CLs, feeders, helium cooling pipes of various temperatures, and so on.…”

Section: Magnet Shared Componentsmentioning

confidence: 99%

Recent progress of the JT-60SA project

Shirai

Barabaschi²,

Kamada

2017

Nucl. Fusion

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The JT-60SA project has been implemented for the purpose of an early realization of fusion energy. With a powerful and versatile NBI and ECRF system, a flexible plasma-shaping capability, and various kinds of in-vessel coils to suppress MHD instabilities, JT-60SA plays an essential role in addressing the key physics and engineering issues of ITER and DEMO. It aims to achieve the long sustainment of high integrated performance plasmas under the high βN condition required in DEMO. The fabrication and installation of components and systems of JT-60SA procured by the EU and Japan are steadily progressing. The installation of toroidal field (TF) coils around the vacuum vessel started in December 2016. The commissioning of the cryogenic system and power supply system has been implemented in the Naka site, and JT-60SA will start operation in 2019. The JT-60SA research plan covers a wide area of issues in ITER and DEMO relevant operation regimes, and has been regularly updated on the basis of intensive discussion among European and Japanese researchers.

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“…Design and layout of the coil terminal boxes, valve boxes, feeders and cooling pipes for the JT-60SA coil system have been carefully examined in order to keep accessibility to the ports (see Fig. 10) [15].…”

Section: Magnet Shared Componentsmentioning

confidence: 99%