Real-Time Reconstruction of Plasma Equilibrium in FTU

Sadeghi, Yahya; Ramogida, G.; Boncagni, L.; D'Epifanio, C.; Vitale, V.; Crisanti, F.; Zaccarian, Luca

doi:10.1109/tps.2009.2038057

Cited by 7 publications

(6 citation statements)

References 4 publications

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“…Other RT signals (plasma boundaries, plasma current I p , toroidal magnetic field Bt and line integrated density) are obtained via the FTU plasma control system [11]. ECE signals used alone or in combination with the magnetic signals are essentials in the presented architecture in order to detect the radial location of the MHD instabilities.…”

Section: Guiding Criteria Constraints and Requirementsmentioning

confidence: 99%

The Real-Time system for MHD activity control in the FTU tokamak

Sozzi

Alessi

Boncagni

et al. 2012

EPJ Web of Conferences

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Abstract. The Real-Time system for the control of the magnetohydrodynamics instabilities in FTU tokamak is presented. It is based on both a-priori information derived from statistical treatment of a database and Real-Time elaboration of live diagnostics data. The analysis codes are executed in different time threads based on multi-processors machines. The actuator is the 2x0.4MW 140 GHz ECRH system equipped with the new fast quasi-optical steerable launcher.

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Section: Guiding Criteria Constraints and Requirementsmentioning

confidence: 99%

The Real-Time system for MHD activity control in the FTU tokamak

Sozzi

Alessi

Boncagni

et al. 2012

EPJ Web of Conferences

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“…The GradShafranov equation can be analytically solved outside and inside of the plasma [8,9]. The magnetic flux w can be expanded in a series of toroidal multi-poles in a toroidal coordinate system ðh;x; /Þ [4,10]. According to [10] the solution of the equation in toroidal coordinates correspond to:…”

Section: Solution Of the Grad-shafranov Equationmentioning

confidence: 99%

“…7 the MARTe ODIN Test System is shown. Several signals are produced by the WaveFormGAM, the Test Probe signals and an arbitrary and tabled guess for w (for example a conic surface centered in R 0 and monotonically decreasing or increasing along h and constant alongx) [3][4][5]. Next, the moments are calculated (using MomentsGAM) and a least squares approximation which fits the magnetic measurements is performed by the ODINGAM.…”

Section: Marte Framework In Ftumentioning

confidence: 99%

“…In previous researches [3][4][5] we have shown the real-time reconstruction of plasma equilibrium using the multi-polar moments. In this paper we are interested in validating the real-time ODIN on MARTe modular architecture using plasma linearized model in FTU tokamak.…”

Section: Introductionmentioning

confidence: 99%

“…This validation let us to reduce the ODIN algorithm computation time by applying parallel processing over two or more real-time threads in estimation of reconstruction process in FTU experiments. As we proposed in [4], the idea is to split over those threads the independent sine and cosine parts of the calculation or to separate them out in different sections of the mesh, letting the main thread merge the results when needed. Once the equilibrium is reached, the system could send the output data to the main feedback controller performing shape and position regulation (using a real-time network such as RTNET [5] or using DACs and ADCs).…”

Section: Introductionmentioning

confidence: 99%

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Pre-Results of the Real-Time ODIN Validation on MARTe Using Plasma Linearized Model in FTU Tokamak

Sadeghi

Boncagni

2011

J Fusion Energ

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MARTe is a modular framework for real-time control aspects. At present time there are several MARTe systems under development at Frascati Tokamak Upgrade (Boncagni et al. in First steps in the FTU migration towards a modular and distributed real time control architecture based on MARTe and RTNet, 2010) such as the LH power percentage system, the gas puffing control system, the realtime ODIN plasma equilibrium reconstruction system and the position/current feedback control system (in a design phase) (Boncagni et al. in J Fusion Eng Design). The realtime reconstruction of magnetic flux in FTU tokamak is an important issue to estimate some quantities that can be use to control the plasma. This paper addresses the validation of real-time implementation of that task on MARTe.

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Procedure to Perform Real-Time Reconstruction of the Magnetic Flux in FTU Using RTAI Virtual Machine

Sadeghi

2011

J Fusion Energ

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One of the important topics of plasma equilibrium issue in a tokamak is to determine and reconstruct the magnetic iso-flux surfaces using plasma boundary condition (in Shafranov, Sov Phys JETP Engl Transl 37:775, 1960). The equilibrium code ODIN is based on the technique using the multi-polar moments method (in Alladio and Crisanti, Nuclear Fusion 26:1143, 1986) which results from homogeneous solution of the Grad-Shafranov equation. This method is used to reconstruct the magnetic flux and equilibrium in the Frascati Tokamak Upgrade experiment. The real-time reconstruction of the magnetic field map is important to compute quantities necessary to control the plasma. In this paper we address the procedure to perform real-time reconstruction of the magnetic flux (based on ODIN) on RTAI virtual machine. As result of the real-time implementation, we will show the time evolution of the reconstructed magnetic iso-flux surfaces.

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Real-Time Reconstruction of Plasma Equilibrium in FTU

Cited by 7 publications

References 4 publications

The Real-Time system for MHD activity control in the FTU tokamak

The Real-Time system for MHD activity control in the FTU tokamak

Pre-Results of the Real-Time ODIN Validation on MARTe Using Plasma Linearized Model in FTU Tokamak

Procedure to Perform Real-Time Reconstruction of the Magnetic Flux in FTU Using RTAI Virtual Machine

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