A quasi-optical 1 mm microwave heterodyne interferometer for plasma diagnostics using a frequency-tripled Gunn oscillator
作者： N Niemöller , V Schulz-von der Gathen , A Stampa , H F Döbele
DOI: 10.1088/0963-0252/6/4/004
关键词:
摘要: A heterodyne interferometer for electron density measurements in low-density plasmas is described. It operates at 309 GHz. The available power amounts to 5 mW. reference microwave field, shifted by 10 kHz, generated the Doppler shift connected with back reflection from grooves of a grating on circumference rotating wheel. Collimation and focusing radiation are performed elliptic aluminum mirrors. Schottky barrier diodes operated mixer configuration used as detectors. applied line-of-sight integrated measurement plasmas. Line densities down several 1014 m-2 can be measured; spatial resolution slightly better than mm.
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