Speaker
Description
This paper presents the design and simulation of a high-efficiency 10 MW RF power source, including the complete electron gun, electromagnet focusing system, RF interaction structure, and output window. At an accelerating voltage of 115.1 kV, the designed electron gun produces a total space-charge-limited beam current of 134.8 A while maintaining an average cathode loading below 3.36 A/cm², which is suitable for safe and efficient operation. The calculated maximum surface electric field in the beam optics region remains below 5.8 kV/mm, while the electric field at the high-voltage ceramic seal is limited to 0.65 kV/mm. These values indicate that the structure operates within acceptable electrical stress limits, thereby reducing the risk of breakdown and improving long-term device reliability in 2D and 3D software. The static beam analysis shows that the electron beam, with an average beam radius of 5 mm, is successfully focused and transported to the interaction cavity. The beam ripple is maintained to 5%. Beam dynamics analyses were conducted using 1D AJDISK, 1.5D KlyC, and 2D KlyC simulation tools, predicting efficiencies of 73.98%, 69.35%, and 67.72%, respectively. A pillbox-type RF output window was designed and simulated in CST Studio Suite, achieving a reflection coefficient of S11 = −35.4 dB and a voltage standing wave ratio of VSWR = 1.034 at 1.3 GHz, indicating low dielectric heating under nominal operation. A preliminary non-depressed collector was also designed to intercept the six beamlets at full energy (~115 keV), dissipating approximately 4.1–5.0 MW of unspent beam power across the tube.
Funding Agency
IHEP
| I have read and accept the Privacy Policy Statement | Yes |
|---|