Analysis and design of the central stack for the SMART tokamak

Segado-Fernandez, J.; Mancini, A.; Garcia-Dominguez, J.; Ayllon-Guerola, J.; Cruz-Zabala, D.J.; Velarde, L.; Garcia-Muñoz, M.; Viezzer, E.; Navarro, C.; Agredano-Torres, M.; Vicente-Torres, P.

doi:10.1016/j.fusengdes.2023.113832

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…The cylindrical vacuum vessel has a radius of 0.8 m and height of 1.6 m (figure 1) [7,19]. The vessel and coils geometry are expected to accommodate plasmas with major radius R 0 = 0.45 m and minor radius at the midplane a = 0.25 m. Several ports on the top/bottom of the vessel, as well as on the outboard wall, have been designed to host diagnostics, feedthroughs for the PF coils and access for the NBI system.…”

Section: The Smart Devicementioning

confidence: 99%

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NBI optimization on SMART and implications for scenario development

Podestà,

Cruz-Zabala,

Poli

et al. 2024

Plasma Phys. Control. Fusion

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The SMall Aspect Ratio Tokamak (SMART) under commissioning at the University of Seville, Spain, aims to explore confinement properties and possible advantages in confinement for compact/spherical tokamaks operating at negative vs. positive triangularity. This work explores the benefits of auxiliary heating through Neutral Beam Injection (NBI) for SMART scenarios beyond the initial Ohmic phase of operations, in support of the device’s mission. Expected values of electron and ion temperature achievable with NBI heating are first predicted for the current flat-top phase, including modeling to optimize the NBI injection geometry to maximize NBI absorption and minimize losses for a given equilibrium. Simulations are then extended for a selected case to cover the current ramp-up phase. Differences with results obtained for the flat-top phase indicate the importance of determining the plasma evolution over time, as well as self-consistently determining the edge plasma parameters for reliable time-dependent simulations. Initial simulation results indicate the advantage of auxiliary NBI heating to achieve nearly double values of pressure and stored energy compared to Ohmic discharges, thus significantly increasing the device’s performance. The scenarios developed in this work will also contribute to diagnostic development and optimization for SMART, as well as providing test cases for initial predictions of macro- and micro-instabilities.

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Section: The Smart Devicementioning

confidence: 99%

“…A central solenoid is used to drive inductive current [19]. The main (toroidal) magnetic field is generated through 12 rectangular toroidal field (TF) coils [9].…”

Section: The Smart Devicementioning

confidence: 99%

NBI optimization on SMART and implications for scenario development

Podestà,

Cruz-Zabala,

Poli

et al. 2024

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

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Design and development of the magnetic diagnostic systems for the first operational phase of the SMART tokamak

Pozo,

Vicente-Torres,

Cruz-Zabala

et al. 2024

Review of Scientific Instruments

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A set of magnetic diagnostics has been designed, manufactured, and calibrated for the first operational phase of the small aspect ratio tokamak. The sensor suite comprises of Rogowski coils; 2D magnetic probes; and poloidal, saddle, and diamagnetic flux loops. A set of continuous Rogowski coils has been manufactured for the measurement of plasma current and induced eddy currents in conductive elements. A set of flux loops and magnetic probes will be used as input for the reconstruction of the magnetohydrodynamic equilibrium. The quantity and position of these sensors have been verified to be sufficient with synthetic equilibrium reconstructions using the equilibrium fitting code and baseline scenarios computed with the Fiesta code. These sensors will also be used as input for the real-time control system, and magnetic probes will be used for the detection of plasma instabilities. The calibration procedure for the magnetic probes is described, and the results are shown. The signal conditioning and data acquisition systems are described.

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Analysis and design of the central stack for the SMART tokamak

Cited by 2 publications

References 9 publications

NBI optimization on SMART and implications for scenario development

NBI optimization on SMART and implications for scenario development

Design and development of the magnetic diagnostic systems for the first operational phase of the SMART tokamak

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