Multiphysics Analysis of the 2.5 MeV BNCT RFQ Accelerator

TL;DR

This paper presents a comprehensive multiphysics analysis of a 2.5 MeV RFQ accelerator designed for BNCT, focusing on thermal management and frequency stability, verified through CST and ANSYS simulations.

Contribution

It introduces a detailed multiphysics analysis of the BNCT RFQ accelerator, including thermal effects and frequency shift prediction, using CST and ANSYS tools.

Findings

RFQ achieves 1.73×10^13 n/sec/cm^2 neutron yield

Thermal management is critical for RFQ stability

Frequency shift during operation is successfully predicted

Abstract

Boron Neutron Capture Therapy (BNCT), is an advanced cancer therapy that destroys the cancer tumors using the well-known Li(p,n)Be . Because of the highly selectively reaction between a boron and a neutron, BNCT is effective for rapidly spreading cancer, invasive carcinoma, such as head and neck cancer, melanoma, malignant brain tumors and so on. The PKU RFQ group proposes an RFQ based neutron source for BNCT application. The 162.5 MHz four-vane RFQ will accelerate 20-mA H+ from 35.0 keV to 2.50 MeV in CW mode, and delivers a neutron yield of 1.73*10^13 n/sec/cm^2. The thermal management will become the most important issues. The detailed multiphysics analysis of the BNCT RFQ will be studied, and the RFQ frequency shift during nominal operating condition is also predicted. The multiphysics analysis is performed by using the CST Multiphysics Model and verified with ANSYS Multiphysics.