Experimental study on influence of secondary-throat diffuser on COIL
A secondary-throat diffuser and an 8°diffuser are used respectively on COIL.The performance parameters of the two diffusers are measured and compared.The result indicates that the secondary-throat diffuser may effectively insulate the flow disarrangement from the diffuser,avoid the down-stream flow disarrangement into the optical resonator,improve the stability of static-pressure in resonator,and enhance the stability of the output power of COIL.The secondary-throat diffuser is propitious to COIL at high back-pressure.