Experimental study of long coupled helix resonator

Experimental tests of a coupled normal temperature low β helix resonator with six-half-wavelength are described. The frequency shift and dynamic instability of the resonator are studied experimentally. The mechanical vibration and caused by ponderomotive effect has been controlled. This resonator can run stably at a RF power of 50 KW, frequency of 27 MHz, duty factor of 1/6, and the maximum voltage gain is more than 1.1 MV. Some measures have been taken to increase the stability of the helix. The resonator tested is a model for a heavy ion booster following a small van de graff accelerator