Boron neutron capture therapy (BNCT) is a more efficient cancer treatment method compared to direct radiation therapy using charged particles such as protons or carbon beams. Particularly, accelerator-based BNCT (AB-BNCT) is attracting attention due to easy construction in a hospital. The Korea Institute of Radiological & Medical Sciences (KIRAMS) has constructed an injection system for an electrostatic AB-BNCT accelerator and commissioned 30 keV H⁻ and 5 keV D⁻ ion beam facilities. The beam characteristic parameters and Twiss parameters should be confirmed experimentally, and various methods have to be applied for the related measurements. In this study, the linear matrix formalism is used as a technique to measure the beam characteristic and Twiss parameters by varying the magnetic field strength of a solenoid in the beam line. To confirm the validity of this method, a multi-particle tracking code was executed. The simulation results confirm that the proposed method is effective for extracting Twiss parameters. After verification via the multi-particle tracking code, the method was applied to perform experimental measurements. Notably, the method accurately obtains the transverse beam emittance within reasonable uncertainty levels. Thus, our results show that the proposed method is a convenient technique for extracting the Twiss parameters indirectly. The results of the Twiss parameter measurement can potentially be more precise if other aspects, such as the quadrupole magnetic field strength, are incorporated.

与使用带电粒子（如质子或碳束）的直接放射疗法相比，硼中子俘获疗法（BNCT）是一种更有效的癌症治疗方法。尤其是，基于加速器的BNCT（AB-BNCT）由于在医院中易于构造而受到关注。放射学和医学科学研究所韩国（KIRAMS）已构造的喷射系统的静电AB-BNCT加速器和委托30千电子伏ħ ^-和5keV的d ^-离子束设施。光束特性参数和Twiss参数应通过实验确定，相关的测量必须采用各种方法。在这项研究中，线性矩阵形式被用作通过改变光束线中螺线管的磁场强度来测量光束特性和Twiss参数的技术。为了确认该方法的有效性，执行了多粒子跟踪代码。仿真结果证实了该方法对于提取Twiss参数是有效的。通过多粒子跟踪代码进行验证后，该方法被应用于执行实验测量。值得注意的是，该方法在合理的不确定性水平内准确地获得了横向光束的发射率。从而，我们的结果表明，该方法是一种间接提取Twiss参数的便捷技术。如果结合其他方面（例如四极磁场强度），Twiss参数测量的结果可能会更精确。