The invention relates to a
harmonic oscillator and
electrode fixed connection method suitable for a high vacuum environment. The method comprises the following steps that: 1, a
harmonic oscillator part and an
electrode part are processed and manufactured, the
diameter of an
electrode part center hole is larger than that of a
harmonic oscillator part center rod, and a fit clearance is reserved between the electrode part center hole and the
harmonic oscillator part center rod, and a chamfer surface is manufactured on the upper end opening of the electrode part center hole; 2, cleaning is performed so as to remove
grease on the surface of the parts; 3, vacuum pre-exhausting treatment is performed; 4, assembling is performed, and electric zero setting is performed, an
indium wire is arranged into the chamfer at the upper end of the electrode central hole before electric zero setting,
silica gel is applied to the gap below the electrode after the zero setting, and the
silica gel is solidified to form a
silica gel sealing ring; and 5, after the silica gel is solidified, the
assembly of the electrode and the oscillator, together with an adjusting fixture, is arranged into a
vacuum furnace, and heating, insulating and cooling are sequentially performed to fill the fit clearance between the electrode and the oscillator with
indium so as to realize the fixed connection of the electrode and the oscillator. According to the method of the invention, the reliable fixed connection of the
harmonic oscillator and the electrode is realized, and the prepared
assembly structure meets the high-vacuum use environment.