抄録
The oscillations in a bounded plasma in an external magnetic field were studied. The hot cathode discharge tubes used were filled with mercury vapour at pressure of the order of 10−3 mm Hg. The weak uniform magnetic field whose strength was in a region between 0 and 350 gauss was applied parallel to the direction of discharge current. The oscillations were detected by a super-regenerative detector adjusted to a constant frequency.
The oscillations of two types were detected: One has a frequency which depends on the magnetic field strength alone, and the other has a frequency which depends on the electron concentration as well as the magnetic field strength. The former is interpreted as the cyclotron resonance oscillation, and the latter as the plasma type oscillation.
