| 摘要 |
<p>A magnetron cathode comprises a structure 11 arranged to support a cathode body 16 which includes an electron emissive material. The support structure 11 has a longitudinal axis, and includes a first part 12 having a first cylinder 12a integrally formed with a first end hat 12b and a second part 13 having a second cylinder 13a integrally formed with a second end hat 13b. The first and second cylinders are joined together at an overlapping region d in the longitudinal axial direction. The cathode body 16 is located around the first cylinder 12a of the first part 12 of the support structure 11, and is joined thereto by a brazed joint. The outer surface of the first cylinder 12a also has a plurality of circumferential grooves 17, or at least one helical groove, in the region of the brazed joint.</p> |
