Abstract: A high-frequency component for guiding electromagnetic high-frequency waves includes a hollow conductor structure with a housing and a field-guiding region. The housing includes at least in part plastics material and the housing wall surface facing the field-guiding region includes a metal coating. Two or more parallel-guided cooling ducts can be integrated into the housing, the mutual spacing of which varies in accordance with a field density of an energy-guiding mode.

Abstract: A particle accelerator for creation of a bunched particle beam and a method for the operation of such a particle accelerator are provided, wherein the particle accelerator includes an HF source and a directional coupler for splitting HF power of the HF source of an HF side into at least a first and a second HF power coupler of a cavity side for coupling in the HF power into at least one accelerator cavity. A non-reciprocal phase shifter is inserted on the cavity side between the directional coupler and the second HF power coupler, and an HF load is connected on the HF side to the directional coupler, where the non-reciprocal phase shifter is configured to pass a reflected HF wave of the second HF power coupler with phase delay in the direction of the directional coupler in such a way that a destructive interference of the reflected HF waves of the first and second power couplers occurs in the directional coupler in the direction of the HF source on the HF side.

Abstract: A particle accelerator for creation of a bunched particle beam and a method for the operation of such a particle accelerator are provided, wherein the particle accelerator includes an HF source and a directional coupler for splitting HF power of the HF source of an HF side into at least a first and a second HF power coupler of a cavity side for coupling in the HF power into at least one accelerator cavity. A. non-reciprocal phase shifter is inserted on the cavity side between the directional coupler and the second HF power coupler, and an HF load is connected on the HF side to the directional coupler, where the non-reciprocal phase shifter is configured to pass a reflected HF wave of the second HF power coupler with phase delay in the direction of the directional coupler in such a way that a destructive interference of the reflected HF waves of the first and second power couplets occurs in the directional coupler in the direction of the source on the HF side.