ISSN:
1089-7623
Quelle:
AIP Digital Archive
Thema:
Physik
,
Elektrotechnik, Elektronik, Nachrichtentechnik
Notizen:
A compact poloidal array of ten receiving antennae has been installed on the high-field wall (x=+30 cm) of the Texas Experimental Tokamak (TEXT) opposite the electron cyclotron heating (ECH) microwave launch port (x=−45 cm, 60 GHz, 200 kW). Both these antennae and the launching structure are oriented to couple to the ordinary mode in plasma. The array serves as a diagnostic of the unabsorbed, first-pass ECH microwave power, which includes both power refracted by the equilibrium plasma density gradients and power scattered by density fluctuations. Each antenna has a Δθy=13° poloidal and Δθz=32° toroidal half-power beam width, corresponding to 12-dB gain. For refraction studies, interchannel and intrachannel poloidal resolutions are Δy=3.5 and 2.5 cm, respectively, at the array aperture surface. For scattering studies, the wave number selectivity extends from k⊥=0±2.5 cm−1 to k⊥=7±2.5 cm−1.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.1143434
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