I. Ogawa et al., LONG-PULSE OPERATION OF A SUBMILLIMETER-WAVE GYROTRON AND ITS APPLICATION TO PLASMA SCATTERING MEASUREMENT, Review of scientific instruments, 65(5), 1994, pp. 1788-1789
Electromagnetic waves of medium power (P=110 W) in the submillimeter r
ange (f=354 GHz) are generated in long pulses (tau = 0.6 s) by a submi
llimeter wave gyrotron. The fluctuation levels of output power are sup
pressed within 8% by optimizing the operating parameters. This output
has been applied to plasma scattering measurements. Preliminary result
s of low-frequency density fluctuations in Compact Helical System plas
ma are presented.