Compact system for coupling RF power directly into RF LINACS

A system for injecting radio frequency (RF) energy into an accelerator, the system comprising:

• a vacuum chamber structure containing a cavity structure providing a vacuum environment within the vacuum chamber structure;
• a power amplifier assembly RF coupled to the cavity structure, wherein the power amplifier assembly comprises:
• an RF power amplifier located, in operation, adjacent to the cavity structure and external to the vacuum environment,
• a socket interface having a complementary conductive surface for electrically coupling an RF output of the RF power amplifier,
• an electrically insulating break providing a high voltage hermetic break barrier between the socket interface and conductive structures within the vacuum environment of the cavity structure, and
• an antenna located within the cavity structure, wherein the antenna is connected to the socket interface and electromagnetically coupled to the cavity structure;
• and
• a power supply interface including:
• a biasing element to bias the power amplifier assembly, and
• an RF power source input that receives a radio frequency energy for supplying to the power amplifier assembly for amplifying by the RF power amplifier and transmitting a resulting amplified RF power into the cavity structure,
• wherein the RF output of the RF power amplifier is coupled, via the socket interface and the antenna, to the cavity structure with no more than a negligible power transmission line.