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:10.1038/s41598-023-29997-9

Fabrication of THz corrugated wakefield structure and its high power test

Sci Rep. 2023 Feb 24;13(1):3207. doi: 10.1038/s41598-023-29997-9.

Authors

H Kong^{1

2}, M Chung³, D S Doran⁴, G Ha⁵, S-H Kim¹, J-H Kim¹, W Liu⁴, X Lu^{4

6}, J Power⁴, J-M Seok^{1

4}, S Shin⁷, J Shao⁴, C Whiteford⁴, E Wisniewski⁴

Affiliations

¹ Pohang Accelerator Laboratory, POSTECH, Pohang, Gyungbuk, 37673, Korea.
² Department of Physics, Kyungpook National University, Daegu, 41566, Korea.
³ Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea.
⁴ Argonne National Laboratory, Argonne, IL, 60439, USA.
⁵ Argonne National Laboratory, Argonne, IL, 60439, USA. gwanghui.ha@gmail.com.
⁶ Northern Illinois University, Dekalb, IL, 60115, USA.
⁷ Department of Accelerator Science, Korea University, Sejong, 30019, Korea. tlssh@korea.ac.kr.

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-[Formula: see text]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 [Formula: see text] 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.