Design and simulation study of ultra-fast beam bunches split for three orthogonal planes high-energy electron dynamic radiography

Abstract

Here a compact three orthogonal planes high-energy electron radiography system was proposed. One of the critical technologies, the ultra-fast beam bunches split from the bunch train are studied. The separated bunches could be transported to the three orthogonal planes of the target for dynamic radiography diagnostics. The key elements of the ultra-fast bunches split system are transverse deflecting cavity (TDC) and the twin septum magnet (TSM). The principle of TDC and TSM are briefly introduced. An example of the beam bunches split system for test experiment (40 MeV electron beam) with TDC and TSM is designed and studied by particle-tracking simulation and it confirms this method is valid and feasible. Especially with TSM, a compact three orthogonal planes radiography system can be realized. The evolution of the beam parameters along the beam line from simulation are investigated. The detailed design of the beam split system and beam dynamics simulation study are presented in this paper.

Three-Dimensional High-Energy Electron Radiography Method for Static Mesoscale Samples Diagnostics

“…We also considered TDHEER for the samples' dynamic process diagnostics, for which we cannot use rotating sample technology. However, we proposed three-orthogonal directions HEER with three radiography electron beam lines from one accelerator [2,8]. Here, we propose the reconstruction of the sample's three-dimensional structures with even fewer HEER images and the development of a new reconstruction algorithm [21] in the future.…”

“…High-energy electron radiography (HEER) was proposed as a high spatial and temporal resolution probe tool for high-energy-density physics (HEDP) and inertial confinement fusion (ICF) experimental diagnostic studies [1,2]. In recent years, HEER technology was well developed through both simulations and experiments [3][4][5][6][7][8]. Radiography can be performed with a ps pulse-width electron beam, achieving a spatial resolution close to 1 µm in an experiment with a large magnification imaging lens [9].…”