An integrated high-frequency generator
system utilizing the
magnetic field of the target application including a magnetic
resonance magnet having an application zone and a high-frequency (
microwave / terahertz) generator zone in the
magnetic field of the magnetic
resonance magnet; and a high-frequency (
microwave / terahertz) generator disposed in the high-frequency (
microwave / terahertz) generator zone and utilizing the
magnet field of the magnetic
resonance magnet to generate the high-frequency (microwave / terahertz)
radiation. The magnetic resonance magnet may have an auxiliary
magnetic field source for modifying the magnetic field profile in the high-frequency (microwave / terahertz) generator zone. The high-frequency (microwave / terahertz) generator may include an
electron gun for generating an
electron beam adapted to be focused by a magnetic field source having a spatially rising region, a homogenous region and a decaying region, an
interaction structure for generating high-frequency (microwave / terahertz)
radiation, an
internal mode converter in the homogenous region for extracting the high-frequency (microwave / terahertz)
radiation through a window, and a reduced collector disposed substantially in the homogenous region before the
electron beam spreads in the decaying region.