| 摘要 |
A method of and apparatus for controlling beamed energy radiation, e.g. of electron beams, onto a workpiece make use of a beam gun for producing a series of pulsed energy beams. A power supply for the beam gun is constructed to produce a series of successive, time-spaced groups of discrete, timespaced electrical pulses to produce the said series of the pulsed energy beams. A highly precise, subtle control of the energy flow of the beamed radiation onto the workpiece is achieved in this manner by controlling the time duration tau on and the time interval tau off of the electrical pulses, the time duration Ton and the time interval Toff of the groups and the number n of the electrical pulses in each of the groups. |
