Photon acceleration (PA) driven by ultrarelativistic electron beams offers a promising approach to generating high-power, high-frequency coherent radiation sources. While current methods typically rely on external optical laser pulses injected into beam-driven plasma wakefields, they face significant challenges in synchronization and alignment between electron accelerators and laser systems. We propose to utilize transition radiation (TR) generated by the drive electron bunch traversing the vacuum-gas interface as the seed photons for PA. Using a 1 GeV electron bunch, we demonstrate acceleration of TR from 4.4 $\text{μ}\mathrm{m}$ to 184 nm in 1.6 mm of two-stage uniform plasma, achieving more than a 20-fold frequency boost. Moreover, such techniques as the tailored density profile can further boost the wavelength to 137 nm. By increasing beam and plasma densities, this scheme can be scaled to produce coherent extreme ultraviolet radiation. This work addresses the synchronization and alignment issues occurring in previous approaches, providing a practical path toward beam-driven photon acceleration.

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• Beam optics
• Laser wakefield acceleration
• Plasma optics
• XUV generation
• Advanced accelerator test facilities
• Optical sources & detectors
• Photons