| 摘要 |
<p>Concentrating process and device for an electron beam.. Is intended to be used in combination with an electron beam welding apparatus in which it is important that the beam will be concentrated and regulated in a precise manner. A plate is arranged, which comprises a slit, at the point where it is desired to concentrate the beam. The beam is oscillated through the plate so that the electrons pass through the slit and pass into a collecting cup; the potential developed in this cup is measured and the beam is then concentrated so that the potential developed in this cup is measured and the beam is then concentrated so that the potential is at a maximum value. The device is intended to be used in combination with a welding apparatus and an oscillograph for operating the process. It comprises in combination a heat dissipater, a plate supported by this dissipator and comprising a slit, and a collecting cup, supported by the heat dissipater but insulated from the latter by a ceramic material. The cup is arranged so that the electrons can pass through the slit and pass into the cup.</p> |
