New full simulation model of crystal-based beam extraction using BDSim toolkit enhanced with Geant4 G4ChannelingFastSimModel

TL;DR

This paper develops a comprehensive simulation model for crystal-based beam extraction using BDSim with Geant4 frameworks, demonstrating successful extraction of a 6 GeV electron beam in a synchrotron context.

Contribution

It introduces a new bent crystal component compatible with G4ChannelingFastSimModel and integrates it into a full DESY II Booster Synchrotron simulation within BDSim.

Findings

Successful extraction of a 6 GeV electron beam with specified parameters

Demonstrated integration of crystal component into full accelerator simulation

Provides a tool to accelerate research in crystal-based beam extraction

Abstract

We present the development of a full simulation model for crystal-based beam extraction utilizing the BDSim toolkit in conjunction with the Geant4 G4ChannelingFastSimModel and G4BaierKatkov frameworks. A novel accelerator component - a bent crystal compatible with G4ChannelingFastSimModel - was designed and implemented. As a demonstration, we constructed a complete simulation model of the DESY II Booster Synchrotron within BDSim, incorporating all relevant components. The model accounts for betatron and synchrotron oscillations, as well as radiation losses in the oriented crystal, using G4BaierKatkov. Simulation results demonstrate the successful extraction of a primary monoenergetic 6 GeV electron beam, characterized by a charge of 23 pC, a horizontal beam emittance of 3.6 $\mu$m$\cdot$rad, a vertical beam emittance of 0.32 $\mu$m$\cdot$rad, and an energy spread of 0.008. This approach provides a powerful tool to significantly accelerate R&D for applications related to crystal-based extraction and collimation in synchrotrons and colliders.