| 摘要 |
<p>A grid for use in a linear electron beam tube such as an IOT or TWT includes a grid section 3 and a mounting flange 4 between which is included an accommodation portion 5. During use, the grid section 3 becomes hot and consequently expands but the mounting flange 4 remains relatively cool being connected to a relatively massive structure. Thin flexible strips 8 of the accommodation portion 5 permit relative movement between the mounting flange 4 and the grid section 3 due to differential thermal expansion, thus minimising distortion to the grid section which might othenvise occur if it were connected directly to the mounting flange 4 and hence fixed in its outer diameter length. <IMAGE></p> |
