An analog integrator for thousand second long pulses in Tore Supra

Spuig, P.; Defrasne, P.; Martin, Guillaume; Moreau, M.; Moreau, Ph.; Saint‐Laurent, F.

doi:10.1016/s0920-3796(03)00382-x

Cited by 30 publications

(16 citation statements)

References 1 publication

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“…The plasma current measurements have been specified to be accurate to 1 % or at least 10 kA absolute in the low current range (< 1 MA). Similar requirements on the magnetic diagnostics are reported from TS [303]. Here, the claimed plasma position of below 1 cm requires an absolute measurement uncertainty below 1 %.…”

Section: Equilibriumsupporting

confidence: 63%

“…These low values are only obtained in chopper stabilized operational amplifiers. This type of automatically drift compensated integrator has been improved at TS, where a symmetric variant could improve the drift to typical values of 0.135 mVs after 1000 s [303]. The drift compensation of pure analogue integrators does not work perfectly, if the input signal is not quiescent.…”

Section: 3mentioning

confidence: 99%

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Diagnostics for steady state plasmas

Hartfuß¹,

König²,

Werner³

2006

Plasma Phys. Control. Fusion

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Problems related to the development of diagnostics for steady state fusion plasma experiments are being discussed. The paper concentrates on those necessities already appearing in nowadays non-burning plasma fusion experiments when extending pulse lengths beyond 10 s, i.e. thermal load, erosion, deposition, and long-time signal integration in magnetic diagnostics. Problems arising from high power ECRH under conditions of incomplete absorption are outlined. Individual standard diagnostic systems are discussed to identify their specific problems as well as the opportunities connected with long pulse operation. Burning plasma experiments characterized by intense n-and g-radiation are briefly reviewed for reasons of completeness, dealing with radiation induced processes in windows, fibres, cables, and mirrors. Methods of data handling, real time monitoring, and plasma control are outlined. Index

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Section: Equilibriumsupporting

confidence: 63%

Section: 3mentioning

confidence: 99%

Diagnostics for steady state plasmas

Hartfuß¹,

König²,

Werner³

2006

Plasma Phys. Control. Fusion

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“…This integration can be performed using analogue integrators [7], digital integrators [8] or hybrid integrators [9]. Each of these type of solutions have particular implementation issues but they all share a common challenge related to the variation of the integrated drift over time, which translates into an increased error in the flux measurement.…”

Section: Signal Acquisitionmentioning

confidence: 99%

Conceptual architecture of the plant system controller for the magnetics diagnostic of the ITER tokamak

Neto

Arshad

Sartori

et al. 2015

Fusion Engineering and Design

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“…During long pulse operation, the electronic of magnetic sensors, which mainly consist of integrators, is subject to drifts, affecting the position and shape control. Even if the integrator drift can be reduced [5], equilibrium reconstruction techniques that could cope with it are highly desirable. Such technique has recently been developed on TS.…”

Section: Hardwarementioning

confidence: 99%

Towards control of steady state plasma on Tore Supra

Moreau

Barana

Brémond

et al. 2006

Proceedings of the 45th IEEE Conference on Decision and Control

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Magnetic Fusion Research worldwide is now, with ITER, about to demonstrate the scientific feasibility of fusion energy production. Feedback control of fusion experiment gets more and more crucial both for performance, stability and machine protection. The Tore Supra tokamak is well suited to tackle these issues due to its unique capability to perform long duration discharges with many actuators/sensors available. The Tore Supra real time measurements and control system has been upgraded to address schemes dedicated to long pulse operation with simultaneous control of an increasing number of plasma parameters. A review of recent progress on several key control issues like measurement drift during long pulses, high efficient fuelling, plasma current profile tailoring, plasma facing component protection and self plasma protection is given.

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An analog integrator for thousand second long pulses in Tore Supra

Cited by 30 publications

References 1 publication

Diagnostics for steady state plasmas

Diagnostics for steady state plasmas

Conceptual architecture of the plant system controller for the magnetics diagnostic of the ITER tokamak

Towards control of steady state plasma on Tore Supra

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