Bahng Jungbae, Lee Byoung-Seob, Kim Eun-San, Park Seong Hee, Park Hyang-Kyu
Department of Accelerator Science, Korea University Sejong Campus, Sejong 30015, South Korea.
Korea Basic Science Institute, Ochang Center, Cheongju 28119, South Korea.
Rev Sci Instrum. 2020 Feb 1;91(2):023323. doi: 10.1063/1.5128619.
Accelerator Based Neutron Sources (ABNS) have been studied for their utility in materials research as well as for boron neutron captured therapy. By making significant efforts to study the (p,n) and (d,n) nuclear reactions, the specifications of the accelerator system have been determined. In this paper, we compare the design results for two types of radio frequency quadrupole (RFQ) accelerators to provide proton and deuteron beams, respectively. Both systems consist of an electron cyclotron resonance (ECR) ion source, a low-energy beam transport system, an RFQ accelerator, a medium-energy beam transport system, a Be target, and a moderator system. In order to achieve a compact accelerator system at a reasonable cost, different requirements must be applied to the design of RFQ accelerators. The proton RFQ has been designed with an operation frequency of 352 MHz, up to 4 MeV acceleration, 10 mA beam intensity, and a continuous-wave (CW) operation mode to achieve 0.84 × 10 n/(s/cm) of neutron production. However, the deuteron RFQ has been designed with an operation frequency of 200 MHz, up to 2.5 MeV acceleration, 15 mA of beam intensity, and a CW operation mode to achieve 1.02 × 10 n/(s/cm) of neutron production. In this paper, we describe the merit of the deuteron based neutron source by comparing two types of the RFQ accelerators for proton and deuteron beams including the common system of the ECR ion source and Be target in detail.
基于加速器的中子源（ABNS）因其在材料研究以及硼中子俘获治疗中的应用而受到研究。通过大力研究（p，n）和（d，n）核反应，确定了加速器系统的规格。在本文中，我们比较了两种分别用于提供质子束和氘核束的射频四极杆（RFQ）加速器的设计结果。这两个系统均由电子回旋共振（ECR）离子源、低能束流传输系统、RFQ加速器、中能束流传输系统、铍靶和慢化剂系统组成。为了以合理的成本实现紧凑的加速器系统，必须对RFQ加速器的设计提出不同的要求。质子RFQ的设计运行频率为352 MHz，加速能量高达4 MeV，束流强度为10 mA，采用连续波（CW）运行模式，以实现0.84×10 n/(s/cm)的中子产额。然而，氘核RFQ的设计运行频率为200 MHz，加速能量高达2.5 MeV，束流强度为15 mA，采用CW运行模式，以实现1.02×10 n/(s/cm)的中子产额。在本文中，我们通过详细比较用于质子束和氘核束的两种RFQ加速器（包括ECR离子源和铍靶的通用系统）来描述基于氘核的中子源的优点。
