Research Needs for Magnetic Fusion Energy Sciences - US Burning ...

ity limits have been maintained. integrated simulation capability of all scenarios has greatly improved.
The aRies-Rs 2 and aRies-at 3 design studies, which project to competitively low costs
of electricity, are based largely on these positive results. key remaining challenges are to demonstrate
that advanced scenarios can be extended to steady state, with needed reliability and at
demo-relevant parameters, and to integrate them with relevant edge parameters and divertor
solutions.
Progress has also been made in the area of superconducting magnets. The Us played a key role
in developing and testing magnets for iteR, notably the central solenoid model coil, the world’s
most powerful pulsed superconducting magnet (Figure 2). an example of strong international
collaboration, its inner module was fabricated by a collaboration of Us universities, laboratories,
and industry, and the outer module was fabricated in Japan by a laboratory-industry collaboration.
Joint tests in Japan achieved a magnetic field of 13 tesla, with a stored energy of 640 mJ at a
current of 46,000 amperes and high stability to transients. The levitation coil of the levitated dipole
experiment (ldX), an innovative confinement device at a much smaller scale, was fabricated
using new high-temperature superconductor material.
(Photo courtesy of JAEA).
Figure 2. The Central Solenoid Model Coil, used to develop and test superconducting magnets for ITER. US
engineers fabricated the Inner Coil Module and other key components. Photo courtesy of JAEA.
2 F. Najmabadi and the Aries Team, “Overview of ARIES-RS tokamak fusion power plant,” Fusion
Engineering and Design 41 (1998) 365-370, and other articles in this issue.
3 F. Najmabadi and the Aries Team, “The ARIES-AT advanced tokamak, Advanced technology fusion
power plant,” Fusion Engineering and Design 80 (2006) 3-23, and other articles in this issue.
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