Speaker
Description
To address the electron source requirements for a continuous-wave (CW) MeV electron microscopes (MV EM), we developed an L-band normal-conducting (NC) CW accelerating structure with ~1 MeV energy gain powered by a 20-kW CW source. Operating in π-mode, the accelerating structure adopts inter-cavity magnetic coupling, achieving a designed adjacent mode separation of 1.2MHz. With an input radiofrequency (RF) power below 20 kW, the accelerating structure delivers GHz bunch trains, accelerating electrons from 200keV to 1.1MeV. Comprehensive geometry optimization, full-scale RF simulations, and beam dynamics calculations were performed to validate the structure’s performance. A compact water-cooling system was integrated to mitigate thermal deformation under high average power operation, and detailed solid-thermal-fluid simulations confirmed the effectiveness of this cooling system. This NC CW linac provides a cost-effective and highly reliable electron source solution for MV EM applications.
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