Relation of incident energy of high energy primary electron and real efficient secondary electron emission coefficient of metal emitter

At first, this paper gave the definition of real efficient secondary electron emission coefficient and discussed its relation the incident energy of high energy primary electron in metal in theory. When high energy primary electron of different incident energy collided with the same metal emitter. The product of their veal efficient secondary electron emission coefficent and the incident energy of primary electron is approximately constant. Then the theory was proved to be true by experimental date and we also discussed the reasons that the product of real efficient secondary electron emission and the incident energy of primary electron had same discrepancy because of different incident energy of primary electron.