Dependence of the ac loss on the aspect ratio in a cable in conduit conductor

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In two-stage solid-state transformers (SSTs) equipped with LLC DC/DC converters for galvanic isolation, fixed-frequency open-loop operation of LLC stages has been a straightforward and prevailing design choice. Meanwhile, with a closed-loop-operated LLC co ...

We present a scanning tunneling microscope operating in a 3He cryostat at a base temperature of 0.4 K, suitable for electron spin resonance (ESR) [S. Baumann, W. Paul, T. Choi, C. P. Lutz, A. Ardavan, and A. J. Heinrich, Science 350, 417 (2015)], quantum s ...

A triple power series expansion for mutual inductance of two coaxial thick coils with rectangular cross section is obtained. Previously developed calculation methods consist of either semi-analytical methods containing numerical calculations or exact expre ...

The output of inductive power transfer (IPT) systems typically depends heavily on the load resistance and the coupling conditions of the inductive coupler. In this article, we implement variable frequency control and phase-shift control to enhance misalign ...

The need of full transposition of the current carrying elements (strands) in large cables is frequently retained as top design criterion for conductors operating in pulsed mode. However, when the transposition error, i.e., the inductance difference among t ...

Combined high-fusion performance and long-pulse operation is one of the key integration challenges for fusion energy development in magnetic devices. Addressing these challenges requires an integrated vision of physics and engineering aspects with the purp ...

The magnet feeders are part of the critical systems of a fusion reactor since they represent the interface between the in-cryostat components at 4.5 K and the room-temperature cryogenic plant and power supply. The European DEMO tokamak foresees 16 toroidal ...

In online single-sided partial discharge (PD) location, the measured PD reflection patterns are affected by the characteristics of all the components of the associated power network. This paper analyses the performance of a PD location method based on elec ...

The design point that had been chosen for EU DEMO in 2016 is reviewed here and a modification is proposed with a lower aspect ratio. Previously the same aspect ratio, A, was chosen for EU DEMO as in major tokamak experiments including ITER (A = 3.1), and, ...

The superconducting magnet system of the Divertor Tokamak Test (DTT) facility, composed of 18 toroidal field (TF) coils, 6 poloidal field coils and a central solenoid, has been designed and many procurements have been launched. Some manufacturing aspects a ...

In magnetic fusion devices, error field (EF) sources, spurious magnetic field perturbations, need to be identified and corrected for safe and stable (disruption-free) tokamak operation. Within Work Package Tokamak Exploitation RT04, a series of studies hav ...

DT operations at JET gave a unique and invaluable opportunity to design, develop and test real -time controllers that will be applied in future burning plasma devices, as ITER and SPARC. Among them, the dud detector [L. Piron et al. 2019 Fusion Eng. Design ...

Under the auspices of EUROfusion, the ITER baseline (IBL) scenario has been jointly investigated on AUG and TCV in the past years and this paper reports on the developments on TCV. It is found that the performance of TCV IBL is mainly limited by (neoclassi ...

Phase contrast imaging (PCI) is an established and powerful technique for measuring density fluctuations in plasmas and has been successfully applied to several fusion devices. Rooted in a concept first developed for microscopy, PCI belongs to the category ...

The Fast Discharge Units (FDUs) of the Superconducting (SC) Toroidal Field (TF) coils in the European demonstration fusion power plant DEMO warrant the machine integrity over its full lifetime against severe failure events, such as SC coil quenches or any ...

Negative triangularity (NT) scenarios in TCV have been compared to positive triangularity (PT) scenarios using the same plasma shapes foreseen for divertor tokamak test tokamak operations. The experiments provided a NT/PT L-mode pair and a PT H-mode with d ...

In order to cope with the decarbonization challenge faced by many countries, fusion is one of the few alternatives to fossil fuels for the production of electricity. Two devices invented in the middle of the previous century have emerged as the most promis ...

Numerous conductor designs for pulsed magnets based on High Temperature Superconductors (HTS), featuring stacks of tapes are currently being proposed. A major contribution to the AC losses is expected to be given by hysteresis losses. Several numerical mod ...

The EU DEMO Tokamak is foreseen to be equipped with an electron cyclotron (EC) system for plasma heating, magnetohydrodynamic (MHD) control, and thermal instability suppression. Up to six launchers will be installed into equatorial ports with the aim to in ...

Rapid inter-discharge simulation and optimization using the RAPTOR code have allowed the development of a reliable and reproducible early heating strategy for an advanced tokamak (AT) scenario on ASDEX Upgrade. Solving for electron heat and current diffusi ...

Dependence of the ac loss on the aspect ratio in a cable in conduit conductor

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Design Trade-offs of Second Harmonic Minimization in Solid-State Transformers

A high bandwidth and high transmission STM bias line for ESR and quantum stochastic resonance measurements at 0.4 K

Calculation of mutual inductance of two coaxial thick coils with rectangular cross section by using cylindrical multipole expansion

Compensating Propagation Delay in PT-Symmetry-Based Inductive Power Transfer Systems: Control Strategies for Misalignment-Tolerant CC and CV Operations

Performance Comparison of Cables With Partial Transposition

Long plasma duration operation analyses with an international multi-machine (tokamaks and stellarators) database

The magnet feeders for the European DEMO fusion reactor: Conceptual design and recent advances

Electromagnetic time reversal for online partial discharge location in power cables: Influence of interfering reflections from grid components

Re-design of EU DEMO with a low aspect ratio

DTT toroidal field conductor samples test in Sultan: DC and AC characterization

Error field detection and correction studies towards ITER operation

Innovative dud detection based on JET DT experience

Progress in the development of the ITER baseline scenario in TCV

Tangentially viewing phase contrast imaging for turbulence measurements in toroidal fusion devices

DEMO toroidal field coil fast discharge unit integration studies

Experiments and gyrokinetic simulations of TCV plasmas with negative triangularity in view of DTT operations

Global fluid simulations of plasma turbulence in stellarators

Validation and Application of Hysteresis Loss Model for HTS Stacks and Conductors for Fusion Applications

Design Progress of Structural Components of the EU DEMO EC Equatorial Launcher

Inter-discharge optimization for fast, reliable access to ASDEX Upgrade advanced tokamak scenario