First results of the TEXTOR line-of-sight ECE system for ECRH system feedback

J.W. Oosterbeek; E. Westerhof; M.R. Baar, de; M.A. Berg, van den; W.A. Bongers; A. Bürger; M. Graswinckel; R. Heidinger; B.A. Hennen; J. Hoekzema; S. Korsholm; O. Kruijt; B. Lamers; F. Leipold; D.J. Thoen; B.C.E. Vaessen; P. Wortman

First results of the TEXTOR line-of-sight ECE system for ECRH system feedback

J.W. Oosterbeek, E. Westerhof, M.R. Baar, de, M.A. Berg, van den, W.A. Bongers, A. Bürger, M. Graswinckel, R. Heidinger, B.A. Hennen, J. Hoekzema, S. Korsholm, O. Kruijt, B. Lamers, F. Leipold, D.J. Thoen, B.C.E. Vaessen, P. Wortman

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic

Abstract

A line-of-sight ECE diagnostic has been taken into operation on the TEXTOR tokamak, which views theplasma along the optical path of the high power ECRH beam. Separation of the low power ECE and high powergyrotron radiation is achieved by a Fabry-Pérot filter in the form of a 25.75 mm quartz plate which istransparent to the gyrotron radiation but reflects selected ECE frequencies with a periodicity of 3 GHz. Tests at low and high power show that the system is behaving in accordance with expectations. ECE spectra have been obtained both in the absence and during high power ECRH. These clearly show the potential of identifying the location of magnetic islands or the sawtooth inversion radius. For some launching conditions the measured ECE spectrum is strongly perturbed. The reason for these perturbations is under investigation.

Original language	English
Title of host publication	15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, United States, Yosemite National Park, California
Publication status	Published - 2008

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Oosterbeek, J. W., Westerhof, E., Baar, de, M. R., Berg, van den, M. A., Bongers, W. A., Bürger, A., Graswinckel, M., Heidinger, R., Hennen, B. A., Hoekzema, J., Korsholm, S., Kruijt, O., Lamers, B., Leipold, F., Thoen, D. J., Vaessen, B. C. E., & Wortman, P. (2008). First results of the TEXTOR line-of-sight ECE system for ECRH system feedback. In 15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, United States, Yosemite National Park, California

Oosterbeek, J.W. ; Westerhof, E. ; Baar, de, M.R. ; Berg, van den, M.A. ; Bongers, W.A. ; Bürger, A. ; Graswinckel, M. ; Heidinger, R. ; Hennen, B.A. ; Hoekzema, J. ; Korsholm, S. ; Kruijt, O. ; Lamers, B. ; Leipold, F. ; Thoen, D.J. ; Vaessen, B.C.E. ; Wortman, P. / First results of the TEXTOR line-of-sight ECE system for ECRH system feedback. 15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, United States, Yosemite National Park, California. 2008.

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title = "First results of the TEXTOR line-of-sight ECE system for ECRH system feedback",

abstract = "A line-of-sight ECE diagnostic has been taken into operation on the TEXTOR tokamak, which views theplasma along the optical path of the high power ECRH beam. Separation of the low power ECE and high powergyrotron radiation is achieved by a Fabry-P{\'e}rot filter in the form of a 25.75 mm quartz plate which istransparent to the gyrotron radiation but reflects selected ECE frequencies with a periodicity of 3 GHz. Tests at low and high power show that the system is behaving in accordance with expectations. ECE spectra have been obtained both in the absence and during high power ECRH. These clearly show the potential of identifying the location of magnetic islands or the sawtooth inversion radius. For some launching conditions the measured ECE spectrum is strongly perturbed. The reason for these perturbations is under investigation.",

author = "J.W. Oosterbeek and E. Westerhof and {Baar, de}, M.R. and {Berg, van den}, M.A. and W.A. Bongers and A. B{\"u}rger and M. Graswinckel and R. Heidinger and B.A. Hennen and J. Hoekzema and S. Korsholm and O. Kruijt and B. Lamers and F. Leipold and D.J. Thoen and B.C.E. Vaessen and P. Wortman",

year = "2008",

language = "English",

booktitle = "15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, United States, Yosemite National Park, California",

}

Oosterbeek, JW, Westerhof, E, Baar, de, MR, Berg, van den, MA, Bongers, WA, Bürger, A, Graswinckel, M, Heidinger, R, Hennen, BA, Hoekzema, J, Korsholm, S, Kruijt, O, Lamers, B, Leipold, F, Thoen, DJ, Vaessen, BCE & Wortman, P 2008, First results of the TEXTOR line-of-sight ECE system for ECRH system feedback. in 15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, United States, Yosemite National Park, California.

First results of the TEXTOR line-of-sight ECE system for ECRH system feedback. / Oosterbeek, J.W.; Westerhof, E.; Baar, de, M.R.; Berg, van den, M.A.; Bongers, W.A.; Bürger, A.; Graswinckel, M.; Heidinger, R.; Hennen, B.A.; Hoekzema, J.; Korsholm, S.; Kruijt, O.; Lamers, B.; Leipold, F.; Thoen, D.J.; Vaessen, B.C.E.; Wortman, P.

15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, United States, Yosemite National Park, California. 2008.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic

TY - GEN

T1 - First results of the TEXTOR line-of-sight ECE system for ECRH system feedback

AU - Oosterbeek, J.W.

AU - Westerhof, E.

AU - Baar, de, M.R.

AU - Berg, van den, M.A.

AU - Bongers, W.A.

AU - Bürger, A.

AU - Graswinckel, M.

AU - Heidinger, R.

AU - Hennen, B.A.

AU - Hoekzema, J.

AU - Korsholm, S.

AU - Kruijt, O.

AU - Lamers, B.

AU - Leipold, F.

AU - Thoen, D.J.

AU - Vaessen, B.C.E.

AU - Wortman, P.

PY - 2008

Y1 - 2008

N2 - A line-of-sight ECE diagnostic has been taken into operation on the TEXTOR tokamak, which views theplasma along the optical path of the high power ECRH beam. Separation of the low power ECE and high powergyrotron radiation is achieved by a Fabry-Pérot filter in the form of a 25.75 mm quartz plate which istransparent to the gyrotron radiation but reflects selected ECE frequencies with a periodicity of 3 GHz. Tests at low and high power show that the system is behaving in accordance with expectations. ECE spectra have been obtained both in the absence and during high power ECRH. These clearly show the potential of identifying the location of magnetic islands or the sawtooth inversion radius. For some launching conditions the measured ECE spectrum is strongly perturbed. The reason for these perturbations is under investigation.

AB - A line-of-sight ECE diagnostic has been taken into operation on the TEXTOR tokamak, which views theplasma along the optical path of the high power ECRH beam. Separation of the low power ECE and high powergyrotron radiation is achieved by a Fabry-Pérot filter in the form of a 25.75 mm quartz plate which istransparent to the gyrotron radiation but reflects selected ECE frequencies with a periodicity of 3 GHz. Tests at low and high power show that the system is behaving in accordance with expectations. ECE spectra have been obtained both in the absence and during high power ECRH. These clearly show the potential of identifying the location of magnetic islands or the sawtooth inversion radius. For some launching conditions the measured ECE spectrum is strongly perturbed. The reason for these perturbations is under investigation.

M3 - Conference contribution

BT - 15th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, United States, Yosemite National Park, California

ER -

First results of the TEXTOR line-of-sight ECE system for ECRH system feedback

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