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05:56
Construction of a Compact Low-Cost Radiation Shield for Air-Temperature Sensors in Ecological Field Studies
Published on: November 6, 2018
8.7K
RADIATION SHIELDING STUDY FOR THE VERTICAL TEST SYSTEM FOR SUPERCONDUCTING RF CAVITIES.
Dejun Zhou1,2, Lin Lin2, Liwen Feng2
1State Key Laboratory of NBC Protection for Civilian, Research Institute of Chemical Defense, Beijing, China.
Radiation Protection Dosimetry
|December 20, 2018
Summary
This study analyzes electron behavior in a vertical test system (VTS) for superconducting radio frequency cavities. Simulations identified the worst field emission site, informing radiation safety assessments and predicting dose rates.
Area of Science:
- Nuclear Physics
- Accelerator Physics
- Radiation Safety Engineering
Background:
- A vertical test system (VTS) for superconducting radio frequency (SRF) cavities was developed at Peking University.
- High-energy electrons generated during VTS operation pose radiation safety risks.
- Understanding electron impact is crucial for mitigating radiation hazards.
Purpose of the Study:
- To analyze electron behavior and identify the primary source of radiation risk in the VTS.
- To characterize the source term for electron impact on the cavity wall.
- To predict radiation dose rates and residual radioactivity.
Main Methods:
- Particle-in-Cell (PIC) simulations using CST software to model electron trajectories and energy deposition.
- Identification of the most energetic field emission site.
- Monte Carlo simulations using FLUKA to predict prompt dose equivalent rate and residual radioactivity.
Main Results:
- The worst field emission site, responsible for the highest energy deposition on the cavity wall, was identified.
- The source term for electron impact was characterized based on the worst-case scenario.
- Predicted prompt dose equivalent rate distribution and residual radioactivity were obtained.
Conclusions:
- Simulation results accurately predict radiation hazards associated with SRF cavity testing.
- The methodology provides a robust framework for assessing and managing radiation safety in similar experimental setups.
- Experimental validation confirmed the consistency of the simulation findings.
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