Table 1.

Temperature of ferrite core at plasma on time test.

Check Point	RF 2000 W, 8 h	RF 2000 W, 30 min
Sub-ferrite core	250 °C	210 °C
Central ferrite core	440 °C	250 °C
Arc slit aperture	450 °C	450 °C
Sub cable	450 °C	450 °C
Central cable	210 °C	210 °C