Travelling-wave tube with a helical delay line made of boron nitride and attached to the vacuum tube.

摘要

The present invention relates to a travelling-wave tube comprising a delay line of the helical type attached to a sleeve by way of dielectric supports made of boron nitride.
<??>According to the invention, the boron nitride supports (8) carry a layer (9) of insulating material having a secondary emission coefficient greater than 1, such as for example alumina or beryllia.
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