Proceedings Of The Tenth Joint Workshop On Electron .

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Proceedings of the Tenth Joint Workshop onElectron Cyclotron EmissionandElectron Cyclotron HeatingAmeland, the Netherlands6-11 April 1997EditorsTony DonneToon VerhoevenFOM-lnstvoor Plasmafysica "Rijnhuizen"The EIINFORMATIONSBIBUC3THEK 'World ScientificSingapore New Jersey Londoir Hong Kong

CONTENTSPrefacevELECTRON CYCLOTRON THEORY1Summary of the theory sessionM. Bornatici3Quasi-optical effects of microwave beams for current driveS. Nowak, E. Lazzaro and G. Ramponi5Comparison of methods for description of diffraction in an anisotropic plasmaA.G. Peeters, G.V. Pereverzev andE. WesterhofComments on the paper "Comparison of methods for description of diffractionin an anisotropic plasma" by A.G. Peeters,G.V. Pereverzev and E. WesterhofS. Nowak, E. Lazzaro and G. RamponiReply to the comment of Nowak et al.A.G. Peeters, G.V. Pereverzev and E. WesterhofThe influence of diffraction and warm plasma dispersion on the energydeposition profiles for the quasioptical wave beams at ECRH in largetoroidal installationsM.A. Gavrilova and M.D. Tokman17252731Wave propagation and ray-tracing near cyclotron resonanceE. Westerhof39Thermal effects on EC ray tracingL.K. Kuznetsova and R. W. Harvey47Nonlinear coherent structures formation near plasma and cyclotron resonancesT.A. Davydova55Resolving multiharmonic cyclotron emission into upshifted and downshiftedcomponentsV. KrivenskiStabilisation of neoclassical tearing modes by ECCDH.Zohmvii6775

VIIIEdge synchrotron radiation in high-beta fusion reactorsG. Giruzzi and F. Romanelli83Current profile control using fast frequency tuning in ECRH and ECCDO. Dumbrajs, J.A. Heikkinen and H. Zohm91ECE diagnostic on ITER: a feasibility studyM. Bornatici and U. Ruffina99Electron cyclotron autoresonance and current drive in ITERA.Yu. Kuyanov, A.A. Skovoroda, A.V. TimofeevandA.V. Zvonkov107ELECTRON CYCLOTRON DIAGNOSTICS115Summary of the diagnostics sessionD.V.Bartlett117Temperature fluctuation measurementsH.J. Hartfuss and M. Hase119ECE fluctuation measurements on the W7-AS stellaratorM. Hase, H.J. Hartfuss and C. Watts131Correlation of temperature and density fluctuations on W7-ASM. Hase, H.J. Hartfuss andM. Hirsch139Comparison of temperature fluctuation measurements using different techniquesC. Watts, H.J. Hartfuss, M. Hase and G. Cima147High frequency (Langmuir) plasma fluctuations as tool for analysis of internalstate of plasma under OH and ECH on T-10 tokamakV.I. Poznyak, A. A. Bagdasarov, V.V. Piterskii and AM YakovetsElectron cyclotron emission imagingG. Cima, B. Deng, C.W. Domier, R.P. Hsia, C. Liang, N.C. Luhmann Jr.and D.L. BrowerThe TORE-SUPRA ECE heterodyne radiometer and electron temperatureprofile measurementsJ.L. Sigui, P. Gomez and G. Giruzzi155163169

IXDesign of a 32 channel heterodyne electron cyclotron emission system forinstallation on Alcator C- modJ.W. Heard, R.F. Gandy, C. Watts, G. Cima and A. Hubbard177Electron cyclotron absorption experiments at RTPJ.F.M. van Gelder, H.S. Miedema, A.A.M. Oomens, A.J.H. Donne,EC. Schiiller and the RTP team185Results from an electron cyclotron absorption diagnostic on the TdeV tokamakDA. Boyd and F. Skiff193Temperature profile perturbations measured by high-resolution ECE diagnosticsPC. de Vries, A.J.H. Donne, EC. Schuller, G. Waidmann andA. Krdmer-Flecken201Measurement of 3rd harmonic of ECE-radiation at TEXTOR-94A. Krdmer-Flecken, G. Waidmann and PC. de Vries209Applications of high spatial and temporal resolution ECE measurementson JETL. Porte, D.V. Bartlett, G. Conway and P. Smeulders217ECE measurements on HT-7 superconducting tokamakS.Y. Zhang, Y.X. Wan, J.K. Xie, J.G. Li, Y.X. He, G.L Kuang,J.R. Luo, B.N. Wan, Z.S. Fang, K.J. Wang and HT-7 Group225Electron cyclotron emission in TJI-U during sinusoidally modulated ECRHE. de la Luna, V. Krivenski, T. Estrada and J. Sanchez233Non-thermal electron energy distribution from vertical ECE-measurementsat the W7-AS stellaratorW. Pernreiter, U. Gasparino, H.J. Hartfuss, H. Maassberg, M. Romeand N. Marushchenko241Determination of wall reflectivity for ECE frequencies in DHI-DM.E. Austin, R.F. Ellis andT.C. Luce249Physics aspects of the ITER ECE system designD.V. Bartlett255

Technical aspects of the ITER ECE diagnostic front end designG. Vayakis, C. Lippert, C. Walker and the EU Home Team263Flux collectors for ECE diagnostics on ITERP. Buratti, M. Z erbini, P. de Bernardis and M. de Petris271Recent developments in plasma ion diagnostics using collective scattering ofmillimeter wavesT.P. Hughes, H. Bindslev, J. Egedal and J.A. Hoekzema277Local measurements of ion temperature from CTS spectra at W7-ASE.V. Suvorov, L.V. Lubyako, S.E. Fil'chenkov, N.K. Skalyga,V. Erckmann, E. Holzhauer and W. Kasparek289ELECTRON CYCLOTRON EXPERIMENTS297Summary of the experiment session299J.LohrElectron cyclotron wave (ECW) on TCV: The ECW system and its operationM.Q. Tran, T.P. Goodman, M. Henderson, A. Pochelon, S. Albcrti,S. Barry, R. Behn, M. Bourqui, F. Buhlmann, S. Coda, M.J. Dutch,B.P. Duval, D. Fasel, A. Favre, S. Franke, I. Furno, F. Hofmann,J.-Ph. Hogge, P.F. Isoz, B. Joye, J.B. Lister, X. Llobet, P. Mandrin,Ph. Marmillod, Y. Martin, J.-M. Moret, Ch. Nieswand, Z.A. Pietrzyk,P.J. Paris, A. Perez, RA. Pitts, H. Reimerdes, O. Sauter, W. van Toledo,G. Tonetti, H. Weisen, Y.V. Esipchuk, A.A. Martynov, K.A. Razumova,I.N. Roy and R.W. Harvey305Recent ECRH and ECCD experiments at W7-ASH.P. Laqua, V. Erckmann, W7-AS team and ECRH-group317The 110 GHz ECH installation on DIII-D: status and initial experimental resultsJ. Lohr, R.W. Callis, R.C. O'Neill, D. Ponce, T.C. Luce, M.E. Austin,M. Murakami and D. Zhang32975 GHz ECR plasma heating in the L-2M stellaratorD. Akulina, G. Batanov, M. Berezhetskii, I. Danilkin, O. Fedyanin,G. Gladkov, S. Grebenshchikov, N. Kharchev, Yu. Kholnov,Yu. Kuznetsov, L. Kovrizhnykh, N. Larionova, K. Likin,A. Meshcheryakov, K. Sarksyan, I. Sbitnikova and S. Shchepetov341

XIECRH deposition studies in ASDEX UpgradeF. Leuterer, A.G. Peeters, G. Pereverzev, F. Ryter, ECRH- and ASDEXUpgrade Teams349First and second harmonic ECCD experiments in RTPR.W. Polman, J. Lok, E. Westerhof, FA. Karelse, O.G. Kruyt,A. A.M. Oomens, EC. Schiiller and the RTP-team357Long pulse ECRH experiments at 140 GHz on FTU tokamakS. Cirant, R. Bozzi, A. Bruschi, F. Gandini, G. Granucci, V. Mellera,V. Muzzini, A. Simonetto, C. Sozzi, N. Spinicchia, M. Zerbini andthe FTU Team369Further evidence of a thermal transport barrier near the q l rational surfacein the RTP tokamakP. Galli, G. Gorini, P. Mantica, F. de Luca, A. Jacchia, M.R. de Baar,G.M.D. Hogeweij and N.J. Lopes CardozoElectron thermal transport barriers and bifurcation of confinement in dischargeswith off-axis electron cyclotron heating in RTPM.R. de Baar, G.M.D. Hogeweij, N.J. Lopes Cardozo, A.A.M. Oomens,EC. Schiiller and the RTP team379389Measurement and characterization of nonthermal ECE during ECRH in RTPJEM. van Gelder, E. Westerhof, EC. Schiiller and A.J.H. Donne395Nonthermal ECE at the plasma edge during the H-modeA.G. Peeters, W. Suttrop and the ASDEX Upgrade Team403On- and off-axis modulation: "obscure" transport or ECRH deposition effect?U. Gasparino, V. Erckmann, H.J. Hartfuss, H. Maassberg and M. Rome411Electron cyclotron instability under powerful electron cyclotron heating onT-10 tokamak.V.I. Poznyak, A.A. Bagdasarov, V.V. Piterskii andA.N. YakovetsCyclotron and collective microwave emission under ohmical heating and lowerhybrid pumping of the FT-2 tokamak plasmaV.N. Budnikov, V.V. Dyachenko, LA. Esipov, E.R. Its, S.VKrikunov,S.I. Lashkul, K.A. Podushnikova, V.V. Rozhdestvensky, S.A. FefelovandS.P. Yaroshevich419427

XIIElectron heat difrusivity in the sawtoothing tokamak coreG. Cima, A. Wootton, B.H. Deng, C.W. Domier, N.C. Luhmann Jr.and D. Brower435Applications of electron cyclotron waves in ITERB. Lloyd443ELECTRON CYCLOTRON TECHNIQUES455Summary of the techniques sessionW. Kasparek457Development of high power gyrotron for ECH/ECCD in JAERI463K. Sakamoto, A. Kasugai, M. Tsuneoka, K. Takahashi, Yu. Ikeda,T. Yamamoto, T. Imai, T. Kariya, Y. Okazaki, K. Hayashi, Y. Mitsunaka,Y. Hirata, T. Shimozuma, M. Sato and K. OhkuboCoaxial cavity gyrotron with dual RF-beam outputB. Piosczyk, O. Braz, G. Dammertz, CT. Iatrou, S. Kern, M. Kuntze,G. Michel, A. Mobius, M. Thumm, V.A. Flyagin, V.I. Khishnyak,A.B. Pavelyev and V.E. Zapevalov475Step-tunable 1 MW broadband gyrotron with Brewster windowG. Dammertz, O. Braz, M. Kuntze, B. Piosczyk and M. Thumm483Prospective sources of coherent millimeter and submillimeter wavelength radiationV.L. Bratman, Yu.K. Kalynov, N.G. Kolganov, M.M. Ofitserov,S.V. Samsonov, A.V. Savilov and A.B. Volkov489Electron beam line and mm-wave experiments of the Fusion-FEMW.H. Urbanus, W.A. Bongers, G. van Dijk, P.J. Eecen,B.S.Q. Elzendoorn, C.A.J. van der Geer, R. de Kruif, P. Manintveld,J. Pluygers, A.J. Poelman, PR. Prins, EC. Schuller, P.H.M. Smeets,A.B. Sterk, M. Valentini, A.G.A. Verhoeven andM.J. van der Wiel497Microwave measurements and engineering at the Fusion-FEMW.A. Bongers, G. van Dijk, B.S.Q. Elzendoorn, C.A.J. van der Geer,507R. de Kruif, P. Manintveld, J. Pluygers, A.J. Poelman, P.R. Prins,F.C. Schuller, P.H.M. Smeets, A.B. Sterk, M. Valentini,A.G.A. Verhoeven, M.J. van der Wiel and W.H. Urbanus

XIIISimulations on electron beam transport and radiation gain in the Fusion FEMM. Valentini, P.J. Eecen, C.A.J. van der Geer, A.G.A. Verhoeven,W.H. Urbanus and M. Caplan515Start-up system for ITERH. Kumric and H. Zohm523A design study for the ECH launcher for ITERR. Prater, H.J. Grunloh, C.P. Moeller, J.L. Doane, R.A. Olstad,M. Makowski andR.W. Harvey531ITER related gyrotron activity in Russia541V.E. Zapevalov, V.V. Alikaev, G.G. Denisov, V.A. Flyagin, A.N. Kuftin,V.I. Kurbatov and V.E. MyasnikovDesign and technical aspects of ITER ECRF systemsM. A. Makowski, F. Elio and D. LoesserCalculations and experiments on multi-beam transmission forthe 140 GHz/lOMW CW ECRH system on W7-XL. Empacher, W. Forster, G. Gantenbein, W. Kasparek, H. Kumric,G.A. Mutter, P.G. Schuller, K. Schworer, U. Schumacher, D. Wagnerand H. ZohmCalculations and experiments on HEi.i mode excitation by paraxialwave beamsG.G. Denisov, N.L Alexandrov, A.A. Bogdashov,A.V. Chirkov,S.V. Kuzikov, D.V. Vinogradov and V.I. MalyginApplication of oversized HE11 waveguides in broadband plasma diagnostictransmission linesD. Wagner, W. Kasparek and G. Gantenbein549561569581Investigations on transmission lines with nonquadratic mirrorsG. Michel and E. Sanchez589Coupling analysis of Gauss-Laguerre beam with hybrid modeK. Ohkubo, S. Kubo, H. Idei, M. Sato, T. Shimozuma and Y. Takita597

XIVTechnical developments in the 110 GHz ECR system of RTPA.A.M. Oomens, F.J. van Amerongen, W.A. Bongers, W. Kooijman,O.G. Kruijt, G. Land, R.W. Polman, EC. Schuller, A.B. Sterk,A.G. A. Verhoeven, RTP-team, G.G. Denisov andD. Vinogradov605ECRH system for the TJ-II stellarator: design and calculationsV. Tribaldos, A. Cappa, F. Castejon, A. Fernandez Curto, R. Martin,B.Ph. van Milligen and KM. Likin613Model of plasma producer on surface cyclotron waves in metal waveguide withdielectric sheathN.A. Azarenkov, V.O. Girka and I. V. Pavlenko621Propagation of the surface cyclotron waves in plasma during ECRHV.O. Girka andl.V. Pavlenko andA.E. Sporov629List of Participants637Author Index641

Electron heat difrusivity in the sawtoothing tokamak core 435 G. Cima, A. Wootton, B.H. Deng, C.W. Domier, N.C. Luhmann Jr. and D. Brower Applications of electron cyclotron waves in ITER 443 B. Lloyd ELECTRON CYCLOTRON TECHNIQUES 455 Summary of the techniques session 457 W. Kasparek Dev

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