Core integrated simulations for the Divertor Tokamak Test facility scenarios towards consistent core-pedestal-SOL modelling

Casiraghi, I.; Mantica, P.; Ambrosino, R.; Aucone, L.; Baiocchi, B.; Balbinot, L.; Barberis, T.; Castaldo, A.; Cavedon, M.; Frassinetti, L.; Innocente, P.; Koechl, F.; Nowak, S.; Agostinetti, Piero; Ceccuzzi, S.; Figini, L.; Granucci, G.; Vincenzi, P.

doi:10.1088/1361-6587/acb6b1

Cited by 16 publications

(21 citation statements)

References 54 publications

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“…Radial profiles of electron and ion temperatures, main density, impurity densities, toroidal rotation, and current density are predicted. The single null, positive triangularity DTT full power reference scenario simulations [7] have been used as basis for this study. As in those simulations, the anomalous transport coefficients are calculated by QuaLiKiz (QLK) [29,30], a reduced gyrokinetic quasi-linear transport model, which is integrated in JETTO.…”

Section: Multi-channel Integrated Modelling Setup For Dtt Full Power ...mentioning

confidence: 99%

“…In addition, the transport due to Edge Localised Modes (ELMs) has been considered. First studies regarding the type-I ELMs, typical of H-mode plasmas, have been performed using existing scaling laws and simplified analytical models [7]. Because of the unavailability of the parameters which characterise such discrete phenomena for the DTT full power scenario, a simple model has been selected: the transport coefficients are increased when the normalised pressure gradient exceeds a critical threshold, spreading the ELM-induced transport almost continuously over time [13].…”

Section: Self-consistent Pedestal Modelling and Predictive Simulation...mentioning

confidence: 99%

“…A comprehensive modelling work regarding scrape-off layer (SOL) predictions and design of optimised divertor configurations has been carried out and is currently ongoing [3][4][5]. In parallel, in close feedback with SOL modelling, an intensive integrated modelling work has been performed with reduced quasi-linear gyrokinetic and gyrofluid transport models to predict the performances and the limits of the planned operational scenarios [6,7]. In this framework, the sustainment and the evolution of the plasma density are key topics which need to be deeply investigated, taking into account the peculiarities of the foreseen operational scenarios of this machine.…”

Section: Introductionmentioning

confidence: 99%

“…The advantages due to gas seeding and pellet injection can be combined, provided the Greenwald density (which is defined as n GW : = I p /(πa 2 ), where I p is the plasma current and a is the minor radius) is not significantly overcome [26]. For the DTT reference scenarios, Greenwald fractions lower than 0.5 are foreseen [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Possible issues linked to the specific characteristics of the DTT machine are highlighted. An integrated modelling study of the full power DTT (R = 2.19 m, a = 0.70 m, B t = 5.85 T, I p = 5.5 MA) H-mode reference scenario has been performed, starting from the most recent DTT scenarios simulations [7] and the updated SOL investigations [5]. In section 1 the DTT full power reference scenario is briefly summarised, together with the simulation set-up of the previous integrated modelling work.…”

Section: Introductionmentioning

confidence: 99%

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Core transport modelling of the DTT full power scenario using different fuelling strategies

Baiocchi,

Aucone,

Casiraghi

et al. 2023

Nucl. Fusion

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A theory-based integrated modelling work of plasma response to deuterium fuelling in the new Divertor Tokamak Test facility (DTT) is performed, using the transport code JETTO with the quasi-linear anomalous transport model QuaLiKiz for the core region. The full power DTT scenario E1 is investigated. It is characterized by 28.8 MW of Electron Cyclotron Resonance Heating (ECRH), 10 MW of Neutral Beam Injection and 6 MW of Ion Cyclotron Resonance Heating to the plasma. Plasma density and temperature profile evolution is calculated using two different fuelling methods, gas puffing and pellet injection, and two different seeding gases, argon and neon. With gas puffing the neutral flux at the separatrix needed to sustain the desired pedestal density level exceeds the feasibility limits of the pumping system, regardless of the type of impurity introduced, thus making the use of pellets mandatory. The simulations performed with pellet injection as fuelling method predict that the pedestal density is well sustained with realistic parameters foreseen for the DTT pellet injector. Strong dependence of the core density on the EC power deposition profile is found. TEM dominance, low outward flux and strongly hollow density in the inner core region are foreseen with central peaked EC power deposition profile. ITG dominance, inward flux and robust density sustainment on the whole radial interval are predicted for spread EC power deposition, though with central density close to the EC limit and with peaked impurity densities. An intermediate deposition extension is found to sustain the whole density profile and to obtain flatter core densities, as previously predicted for the reference full power DTT scenario by fixed pedestal simulations. The EC deposition is negligibly modified by refraction changes both during a single pellet cycle and after several pellet cycles, indicating full compatibility between the EC system and the pellet injection system.

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Section: Multi-channel Integrated Modelling Setup For Dtt Full Power ...mentioning

confidence: 99%

Section: Self-consistent Pedestal Modelling and Predictive Simulation...mentioning

confidence: 99%