Scientific Reports (Feb 2023)

Fabrication of THz corrugated wakefield structure and its high power test

  • H. Kong,
  • M. Chung,
  • D. S. Doran,
  • G. Ha,
  • S.-H. Kim,
  • J.-H. Kim,
  • W. Liu,
  • X. Lu,
  • J. Power,
  • J.-M. Seok,
  • S. Shin,
  • J. Shao,
  • C. Whiteford,
  • E. Wisniewski

DOI
https://doi.org/10.1038/s41598-023-29997-9
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 8

Abstract

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Abstract We present overall process for developing terahertz (THz) corrugated structure and its beam-based measurement results. 0.2-THz corrugated structures were fabricated by die stamping method as the first step demonstration towards GW THz radiation source and GV/m THz wakefield accelerator. 150- $$\upmu$$ μ m thick disks were produced from an OFHC (C10100) foil by stamping. Two types of disks were stacked alternately to form 46 mm structure with $$\sim$$ ∼ 170 corrugations. Custom assembly was designed to provide diffusion bonding with a high precision alignment of disks. The compliance of the fabricated structure have been verified through beam-based wakefield measurement at Argonne Wakefield Accelerator Facility. Both measured longitudinal and transverse wakefield showed good agreement with simulated wakefields. Measured peak gradients, 9.4 MV/m/nC for a long single bunch and 35.4 MV/m/nC for a four bunch trains, showed good agreement with the simulation.