LINAC2026 - 33rd Linear Accelerator Conference

Comparative Study of Virtual Pepper-Pot and Differential Virtual Pepper-Pot Methods for 4D Transverse Phase Space Reconstruction of Small Beams

Not scheduled

2h

Daejeon Convention Center

Poster Presentation MC4.A01: Beam diagnostics Poster Session

Speaker

Jiyoung Choi (Pohang University of Science and Technology)

Description

Precise 4-dimensional (4D) transverse phase space characterization is essential for fully understanding and controlling coupled beam dynamics and beam quality. The Virtual Pepper-Pot (VPP) method has been proposed to reconstruct the 4D transverse phase space, including transverse coupling information, from slit-based measurements. However, the finite slit width imposes intrinsic limitations on reconstruction accuracy by introducing geometric angular spread and limiting the ability to resolve small beam sizes. To overcome these limitations, a differential slit method named the Differential Virtual Pepper-Pot (DVPP) has been proposed. In this study, we investigate the performance of the DVPP method in comparison with the conventional VPP under the identical small electron beam conditions expected in the PAL eLABs facility. Their ability to recover transverse coupling information is evaluated for cases ranging from weak to strong coupling.