Electron Cyclotron Resonance Heating on TEXTOR

Westerhof, E.; Hoekzema, J.A.; Hogeweij, G. M. D.; Jaspers, R.; Schüller, F. C.; Barth, Clemens; Bindslev, H.; Bongers, W.A.; Donné, A. J. H.; Dumortier, P.; Grift, A.F. van der; Kalupin, D.; Koslowski, H. R.; Krämer–Flecken, A.; Kruijt, O.G.; Cardozo, N.J. Lopes; Meiden, H.J. van der; Merkulov, A.; Messiaen, A.; Oosterbeek, J.W.; Prins, P.R.; Scholten, J.; Udintsev, V. S.; Unterberg, B.; Vervier, M.; Wassenhove, G. Van

doi:10.13182/fst05-a692

Cited by 18 publications

(3 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The system requirements are set by the parameters of the TEXTOR tokamak 11 and its ECRH system, 12 and by the main tasks of the system: i.e., detection and localization of the magnetic islands associated with tearing modes, and determination of the phase of the island. The most important modes for stabilization are the m =2, n = 1 and m =3, n =2 FIG.…”

Section: System Requirementsmentioning

confidence: 99%

“…The ECRH system consists of two gyrotrons: a 140 GHz, 800 kW, and 10 s pulse length gyrotron used for ECRH and ECCD, and a 110 GHz gyrotron used exclusively for collective Thomson scattering. 12 The two gyrotrons cannot be operated simultaneously, and only the 140 GHz is used for magnetohydrodynamics ͑MHD͒ control. 16 During a pulse the gyrotron frequency is stable within a range of about 100 MHz.…”

Section: System Requirementsmentioning

confidence: 99%

“…The ECRH installation consists of a 140 GHz, 800 kW, 10 s gyrotron with steerable launcher. 12 At the TEXTOR tokamak a set of perturbation coils, the so called dynamic ergodic divertor ͑DED͒, 13 allows to induce tearing modes in a controlled way. Islands can be driven in the plasma using the DED, or by programming discharges that produce natural tearing modes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A line-of-sight electron cyclotron emission receiver for electron cyclotron resonance heating feedback control of tearing modes

Oosterbeek

Bürger

Westerhof

et al. 2008

Review of Scientific Instruments

Self Cite

View full text Add to dashboard Cite

An electron cyclotron emission ͑ECE͒ receiver inside the electron cyclotron resonance heating ͑ECRH͒ transmission line has been brought into operation. The ECE is extracted by placing a quartz plate acting as a Fabry-Perot interferometer under an angle inside the electron cyclotron wave ͑ECW͒ beam. ECE measurements are obtained during high power ECRH operation. This demonstrates the successful operation of the diagnostic and, in particular, a sufficient suppression of the gyrotron component preventing it from interfering with ECE measurements. When integrated into a feedback system for the control of plasma instabilities this line-of-sight ECE diagnostic removes the need to localize the instabilities in absolute coordinates.

show abstract

Section: System Requirementsmentioning

confidence: 99%

Section: System Requirementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A line-of-sight electron cyclotron emission receiver for electron cyclotron resonance heating feedback control of tearing modes

Oosterbeek

Bürger

Westerhof

et al. 2008

Review of Scientific Instruments

Self Cite

View full text Add to dashboard Cite

show abstract

A new approach for diagnostics of dense magnetoactive plasmas using the effect of parametrically induced transparency

Kryachko

Tokman

Westerhof

2007

Radiophys Quantum Electron

Self Cite

View full text Add to dashboard Cite

UDC 533.9We study theoretically the effect of parametrically induced transparency. The main idea of this effect is transport of the upper-hybrid radiation of overdense toroidal plasmas in vacuum through the opaque region by parametric shift of the radiation frequency. We propose that the microwave radiation employed for electron-cyclotron heating at the second cyclotron harmonic in tokamaks is used as the drive wave. Calculations performed for the TEXTOR tokamak demonstrate that this effect is promising for diagnostics of dense plasmas in toroidal devices if a gyrotron with an ouput power of several hundred kilowatts is used.

show abstract

Design of a feedback system to stabilise instabilities by ECRH using a combined ECW launcher and ECE receiver

Oosterbeek¹,

Westerhof²,

Bongers³

et al. 2007

Fusion Engineering and Design

View full text Add to dashboard Cite

Electron Cyclotron Resonance Heating on TEXTOR

Abstract: TEXTOR is equipped with two gyrotrons at

Cited by 18 publications

References 19 publications

A line-of-sight electron cyclotron emission receiver for electron cyclotron resonance heating feedback control of tearing modes

A line-of-sight electron cyclotron emission receiver for electron cyclotron resonance heating feedback control of tearing modes

A new approach for diagnostics of dense magnetoactive plasmas using the effect of parametrically induced transparency

Design of a feedback system to stabilise instabilities by ECRH using a combined ECW launcher and ECE receiver

Contact Info

Product

Resources

About