To test this scheme, experiment was conducted in a semi-anechoic chamber, with 3 loudspeakers simulating the sound sources of the 3 separate sections of the volumetarget.
A detector array is disposed with laying a shield cylinder around each detection electrode. Feasibility of detection of electrostatic volumetarget by this system has been validated.
Conclusions: the beam Angle and the number of beams have influence upon dose distribution, the dose distribution would be improved for large volumetarget with the increment of beam number.