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Optimization of the electron beam dump for a GeV-class laser electron accelerator.
T Shi1, D Sun1, I Jovanovic2
1Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109, United States.
Summary
Compact radiation shielding for laser-driven electron accelerators is crucial. Simulations show an iron-concrete beam dump design minimizes radiation dose, offering insights for future compact accelerator facilities.
Area of Science:
- Nuclear Physics
- Particle Accelerators
- Radiation Shielding
Background:
- Laser-driven electron acceleration promises smaller high-energy accelerator facilities.
- Compact radiation shielding, particularly electron beam dumps, is essential for these facilities.
- Optimizing beam dump design is key to effective shielding.
Purpose of the Study:
- To simulate and compare different electron beam dump material configurations.
- To identify optimal designs for compact radiation shielding in electron accelerators.
- To provide insights for the design of future compact accelerator facilities.
Main Methods:
- Utilized FLUKA Monte Carlo code for simulations.
- Investigated electron beam energies ranging from 1 to 40 GeV.
- Simulated multi-layer beam dump configurations using high-Z (lead, iron) and low-Z (concrete, borated polyethylene) materials.
Main Results:
- A three-layer structure of iron and concrete, with a thick iron layer, demonstrated the lowest radiation dose at 1, 10, and 40 GeV.
- Beam dump performance is highly dependent on material selection, stacking, thickness, and electron energy.
- Parametric study identified key factors for effective beam dump design.
Conclusions:
- The iron-concrete three-layer design is a promising solution for compact electron beam dumps.
- Material choice and structural configuration significantly impact shielding effectiveness.
- Findings offer valuable guidance for designing radiation shielding in next-generation compact accelerators.
