Delivery and Case studies

• J-PARC is a registered trademark of Japan Atomic Energy Agency and High Energy Accelerator Research Organization.

At SAGA Light Source (SAGA-LS), a synchrotron light facility, Hitachi installed two superconducting wigglers (SCW) with a magnetic field of 4T (Tesla) to meet the need for higher energy synchrotron light. We collaborated with SAGA-LS in designing, manufacturing, and installing the SCWs on site, and carry out regular maintenance contributing to their stable operation.

The LHD is a device designed to confine fusion plasma in a distinctive spiral-shaped superconducting coil, and is based on a unique Japanese idea. Hitachi participated in the construction of the LHD as an overall assembly manufacturer, and since the facility began operation in 1998, has also implemented additional construction including coil cooling systems and internal vacuum vessel equipment, such as a closed divertor and tungsten divertor test units. Going forward, Hitachi will continue to support test operation by providing stable operational maintenance and equipment improvements to enhance performance.

RIKEN's RI Beam Factory (RIBF), a heavy ion accelerator facility, developed the world's first superconducting ring cyclotron (SRC), which accelerates heavy ions up to uranium ions as the facility's final stage accelerator. Hitachi was in charge of manufacturing all six sector electromagnets—the most critical component in the SRC—based on manufacturing technology for large superconducting magnets that we have cultivated over many years.

The Plasma Research Center of the University of Tsukuba is constructing an advanced divertor plasma research device, the Pilot GAMMA PDX-SC, as part of the Action Plan for the Development of a Prototype Nuclear Fusion Reactor ("3. Divertor - Development and Experimentation of Divertor-Class Steady-State High-Density Plasma Experimental Equipment"). Hitachi designed and manufactured two pairs of large superconducting coils that form the backbone of this device. The opening diameter of these coils is approximately 900 mm, making it one of our largest superconductive cooling systems for conductive cooling using a refrigerator.

1. Plasma Research Center,Univ.Tsukuba / University of Tukuba

At the European Organization for Nuclear Research's (CERN) Large Hadron Collider (LHC), the construction of a High-Luminosity Large Hadron Collider (HL-LHC) is currently underway, with the aim of improving the performance of the LHC to further explore new physics. As part of the international cooperation with CERN, Hitachi has received an order for the superconducting magnet (D1), and we are working on its manufacture.

Provided by High Energy Accelerator Research Organization

A muon beamline (D-line) constructed at the Japan Proton Accelerator Research Complex (J-PARC)— Muon science facility of the High Energy Accelerator Research Organization (KEK)—had been in operation until superconducting solenoid magnets for muon transport installed in the D-line were damaged by the 2011 Tohoku earthquake, making it necessary to manufacture replacement superconducting solenoid magnets. Hitachi designed, manufactured, and delivered one solenoid magnet (D1) with a total length of 6 m on the upstream side and two solenoids (D2 and D3) with a total length of 1.5 m after branching.

(Photo courtesy of KEK)

1. High Energy Accelerator Research Organization

Hitachi has also delivered a group of large, high-precision electromagnets for experimental equipment at the Japan Proton Accelerator Research Complex (J-PARC), contributing to leading scientific and research activities in the 21st century (in areas including materials science, life science, nuclear and elementary particle research, and nuclear transmutation technology research).

Received Encouragement Awards in the 65th Electrical Science and Technology, 2017
"The development results of a DC-1MV Ultrahigh Voltage Generator for ITER-NBTF"

Together with the National Institutes for Quantum Science and Technology (QST), Hitachi has developed an ultra-high voltage power supply for NBI, which is required for plasma heating and current drive in the ITER.

A key issue for the transmission line for the NBI device for the ITER is to create a structure that absorbs differences in displacement between the ITER building and the transmission line that may occur during an earthquake. Hitachi developed a relative displacement absorption structure combining expansion joints, laminated rubber, and sliding bearings, and secured the feasibility of the concept through seismic analysis.

1. QST / National Institutes for Quantum Science and Technology

As part of the "1. Superconducting Coil - SC Conceptual Basic Design" component of the Action Plan for the Development of a Prototype Fusion Reactor, together with the QST, we investigated the error field derived from the superconducting coil in the prototype fusion reactor and specifications for an error field correction coil, manufacturing accuracy required for superconducting coils. As a result, we have been able to secure the prospect of relaxing the manufacturing accuracy required for superconducting coils by a factor of 2 to 4 times compared to superconducting coils for ITER.

① Error field evaluation by B_TMEI same as JT-60SA^※1

1. G. Matsunaga et al., Fusion Eng. Des. 98-99, 1113-1117 (2015).

② Regularization to suppress required current is applied for current design of each error field correction coils

③ Designed error field correction coils which can achieve B_TMEI ≦0.1mT at 95% of 5000 coils with error field