HB2025 - the 71st ICFA Advanced Beam Dynamics workshop on High-Intensity and High-Brightness Hadron Beams

Maximum entropy tomography in 4D transverse phase space with frozen space charge

THPT40

Oct 23, 2025, 3:30 PM

2h

third floor (conference center)

Poster Presentation WGB:Beam Dynamics in Linacs THPT poster session

Speaker

Liwen Liu (Institute of Modern Physics, Chinese Academy of Sciences)

Description

Obtaining complete high-dimensional phase space distributions is essential for predicting and controlling intense beam evolution. Building on our prior tomography algorithm that reconstructs four-dimensional (4D) transverse phase space distributions from 2D measurements, applicable under both linear and nonlinear beam transport, this work extends the framework to incorporate frozen space charge effects based on RMS envelope equations. Validated through simulated tomography experiments, this extension significantly enhances reconstruction accuracy for high-intensity beams in comparison with space-charge-free models. The improved algorithm establishes new capabilities for high-fidelity 4D phase space diagnostics in high-current accelerators.