000148660 001__ 148660
000148660 005__ 20181114182146.0
000148660 02470 $$2ISI$$a000276069400114
000148660 037__ $$aCONF
000148660 245__ $$aPolarization Issues with High Power Injection and Low Power Emission in Fusion Experiments
000148660 269__ $$a2009
000148660 260__ $$aMelville, New York$$bAIP Conference Proceedings$$c2009
000148660 336__ $$aConference Papers
000148660 490__ $$aAIP Conference Proceedings
000148660 520__ $$aAll tokamak experiments using ECCD require setting of the beam elliptical polarization for proper coupling to the plasma. This is done either in the matching optics unit (MOU) at the output of the gyrotron, or in a couple of miter bends of the transmission line. Similarly, oblique ECE receivers require selection of the correct elliptical polarization to provide localized measurements. For the TCV tokamak at the CRPP, gyrotron and oblique-ECE polarizers are characterized during either high- or low- power testing of equipment: for the gyrotrons the behaviour is determined at a single frequency, but for the oblique-ECE the broadband response is needed. These characteristics are included in the calibration database and used during subsequent analysis of the power coupling to, or from, the sources (gyrotron, plasma, or low power transmitting antenna). A more detailed characterization has been carried out (at low power) with the MOU for the EU, 170GHz, 2MW, gyrotron prototype for ITER. This paper discusses the methodology and results of these measurements, as well as a review of nearly a decade's worth of experimental data from the 6 gyrotron, 3MW, 82.6GHz TCV system. In particular, the consistency between the calibrations and the subsequent data from tokamak experiments is analysed.
000148660 6531_ $$aRFCU
000148660 6531_ $$aITER
000148660 6531_ $$a170GHz
000148660 6531_ $$aPolarization
000148660 6531_ $$aTCV
000148660 6531_ $$aMOU
000148660 6531_ $$aOblique ECE
000148660 6531_ $$aplasma
000148660 700__ $$0240803$$aGoodman, T. P.$$g105282
000148660 700__ $$0242258$$aFelici, F.$$g177133
000148660 700__ $$aUdintsev, V. S.
000148660 7112_ $$a18th Topical Conf erence on Radio Frequency Power in Plasmas$$cGent, Belgium$$d24-26 June 2009
000148660 720_1 $$aBobkov, V.$$eed.
000148660 720_1 $$aJ.-M., Noterdaeme$$eed.
000148660 773__ $$j1187$$tProceedings of the 18th Topical Conference on Radio Frequency Power in Plasmas
000148660 8564_ $$uhttp://www.appliedphysics.ugent.be/RF2009/$$zURL
000148660 8564_ $$uhttp://crpplocal.epfl.ch/pinboard/papers/094804702.pdf$$zURL
000148660 8564_ $$s1904481$$uhttps://infoscience.epfl.ch/record/148660/files/094804702.pdf$$zn/a
000148660 909C0 $$pCRPP
000148660 909C0 $$0252028$$pSPC
000148660 909CO $$ooai:infoscience.tind.io:148660$$pconf$$pGLOBAL_SET$$pSB
000148660 937__ $$aEPFL-CONF-148660
000148660 970__ $$a0948047/CRPP
000148660 973__ $$aEPFL$$rNON-REVIEWED$$sPUBLISHED
000148660 980__ $$aCONF