Speaker
Description
A hybrid-type, sub-THz wakefield accelerator is under development in collaboration with Korea and US. In developing a structure-based wakefield accelerator (SWFA) with two beam acceleration (TBA) scheme, a witness beam for high-gradient acceleration will be generated by a laser injector and a sub-THz power for accelerating is produced by a wakefield from a corrugated structure using an electron bunch from a RF Linac. For GW-level power generation in the sub-THz frequency range, the generation of electron bunch train and the fabrication of a corrugate structure in sub-THz scale are key issues, while, for a laser injector, the suppression of shot-to-shot jitter of electron beam is important. A 5-cm long corrugated structure is fabricated using two thin metallic plates with through-holes of different inner diameters. The fabrication methods of these plates are developed by either lithography or micro-machining. For a laser injector, a capillary cell for N2-Ne plasma is developed to reduce the energy jitter using effects of ionization injection and ionization diffraction. Efforts are ongoing to achieve results comparable to simulations in PET and Laser injector. We present the most recent experimental results.
Funding Agency
This work was partially supported by the National Research Foundation of Korea(NRF) grant founded by the Korea government(MSIT). (NRF Grant No. : RS-2024-00416252)
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