The DTT device: Costs, site and management aspects

Martone, R.; Albanese, R.; Batistoni, P.; Crisanti, F.; Mazzitelli, G.; Pizzuto, A.

doi:10.1016/j.fusengdes.2017.05.054

Cited by 16 publications

(40 citation statements)

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“…An effective metric by which to estimate the integration accuracy could be the normalized flux discrepancy: Δ𝜓(𝜑 ) = 100 × ( ( ), ( )) . (9) Figure 6 shows that, in the examined case, Δ𝜓 is less than 0.1%, corresponding to a displacement smaller than 1 mm, within a 𝜑 FL path of 𝜑 = 2000 degrees, corresponding to five-and-a-half toroidal turns. The procedure is able to fully analyze 3D magnetic maps.…”

Section: Applicative Examples Of Magnetic Field Lines Trackingmentioning

confidence: 94%

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Effectiveness of the Chebyshev Approximation in Magnetic Field Line Tracking

et al. 2022

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The tracking of magnetic field lines can be very expensive, in terms of computational burden, when the field sources are numerous and have complex geometries, especially when accuracy is a priority, because an evaluation of the field is required in many situations. In some important applications, the computational cost can be significantly reduced by using a suitable approximation of the field in the integrated regions. This paper shows how Chebyshev polynomials are well-suited for field interpolation in magnetic field-line tracking, then discusses the conditions in which they are most appropriate, and quantifies the effectiveness of parallel computing in the approximation procedures.

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Section: Applicative Examples Of Magnetic Field Lines Trackingmentioning

confidence: 94%

“…Here, the DTT (Divertor Tokamak test) facility [9] is considered. The DTT Tokamak device under construction on the ENEA site in Frascati, Italy, designed power and particle exhaust and the possible divertor concepts.…”

Section: The Dtt Tokamakmentioning

confidence: 99%

Effectiveness of the Chebyshev Approximation in Magnetic Field Line Tracking

et al. 2022

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“…In this work, we present the advances carried out in the poloidal interferometer/polarimeter design of the Divertor Tokamak Test facility (DTT) [1], a new tokamak device aiming to investigate and develop solutions for the power and particle exhaust in a fusion reactor, whose construction is starting in Italy.…”

Section: Introductionmentioning

confidence: 99%

Advances in the DTT poloidal interferometer/polarimeter design

Fiorucci¹,

Fassina²,

Filippi³

et al. 2022

J. Inst.

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A multi-channels poloidal interferometer/polarimeter is under development for the Divertor Tokamak Test (DTT) facility, a new tokamak device whose construction is starting in Italy. The aim of the diagnostics is the simultaneous measurement of the line integrated electron density, Faraday rotation and Cotton Mouton effect. The measurement of two polarimetric signals together with the interferometric one would allow for a robust electron density estimate, for the internal magnetic field measurement as well as for the magnetic equilibrium reconstruction. In this work, we present the advances in the diagnostics design whose characteristics are constrained by scientific requirements as well as the DTT structural aspects. In this regards, we have analyzed the possibility of accommodating up to 16 lines of sight in the available space and the contribution of different chords positions in the magnetic equilibrium reconstruction. In particular, we have used the VMEC and V3FIT codes to evaluate the expected interferometric/polarimetric signals and their contribution in the reconstruction of the q profile. These results have been used to optimize the chords positions. Eventually, we present a realistic CAD-driven design of the diagnostic, with details of the most critical components (e.g. the corner cube retroreflectors in the high field side), which would allow for the selected chords configurations implementation.

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“…The Divertor Tokamak Test (DTT) facility [1], whose construction is starting in Frascati, is thought to test different magnetic divertor topologies in reactor relevant regimes envisaged for the nuclear fusion DEMOnstration Power Plant (DEMO). This facility will require robust and reliable diagnostics for the correct operation of the machine and the characterization of the plasma discharge.…”

Section: Introductionmentioning

confidence: 99%

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mentioning

confidence: 99%

Study for a tangential dispersion interferometer/polarimeter for DTT

Filippi¹,

Fiorucci²,

Fassina³

et al. 2022

J. Inst.

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The Divertor Tokamak Test (DTT) facility [1], whose construction is starting in Frascati, will require robust and reliable diagnostics for the correct operation of the machine and the characterization of the plasma discharge. For this purpose, we are studying a common-path dispersion interferometer/polarimeter for the detection of plasma electron density and magnetic field in two different tangential chords in the equatorial plane. The physical principle is based on the generation of a second harmonic which crosses the plasma collinearly with the beam at its fundamental. Being the plasma a dispersive medium, the two beams are subject to different phase shifts from which it is possible to retrieve the plasma free electron density. Moreover, the unconverted part of the fundamental can be used for polarimetric measurement. Two different implementations of the interferometer have been considered, one with a CO2 laser (λ = 10.6/5.3 µm) and another one with Nd:YAG (λ = 1.064/0.536 µm). The former is more sensitive to lower plasma densities and to Faraday rotation, while the latter is more robust to fringe jumps. We have studied the main aspects of these two possible solutions. In particular, we analysed the optics to be used and the expected maximum signals for the interferometry and the polarimetry in a possible plasma scenario of DTT. A tentative draft of the layout of the optics inside the machine will be also presented.

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The DTT device: Costs, site and management aspects

Cited by 16 publications

References 0 publications

Effectiveness of the Chebyshev Approximation in Magnetic Field Line Tracking

Effectiveness of the Chebyshev Approximation in Magnetic Field Line Tracking

Advances in the DTT poloidal interferometer/polarimeter design

Study for a tangential dispersion interferometer/polarimeter for DTT

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