Backwashingable filter can blow down at any moment and backflush the filter without pumping off,which improves the application effect,reduces the cost and elongate the working life.
The chief features of this kind of pump are the wider range of working pressure, the higher pumping speed at the higher pressure and the higher maximum forepressure.
The gain characteristics of the collective free electron laser operating in a superradiant amplifier have been studied through the variation of the interaction length and pumping magnetic field.