Optimization of a Mu2e production solenoid heat and radiation shield using MARS15

TL;DR

This study uses MARS15 Monte Carlo simulations to optimize the Mu2e production solenoid's heat shield, balancing material effectiveness and cost while assessing radiation damage and dose in the system.

Contribution

It presents the first comprehensive Monte Carlo analysis for optimizing the Mu2e PS absorber design considering multiple physical and cost factors.

Findings

Optimized tungsten-based absorber design identified.

Reduced radiation dose and material costs achieved.

Guidelines established for future PS shield improvements.

Abstract

A Monte-Carlo study of several Mu2e Production Solenoid (PS) absorber (heat shield) versions using the MARS15 code has been performed. Optimizations for material as well as cost (amount of tungsten) have been carried out. Studied are such quantities as the number of displacements per atom (DPA) in the helium-cooled solenoid superconducting coils, power density and dynamic heat load in various parts of the PS and its surrounding structures. Prompt dose, residual dose, secondary particle flux are also simulated in the PS structures and the experimental hall. A preliminary choice of the PS absorber design is made on the ground of these studies.