BNCT-related low-energy charged particle beam transport system and charged particle beam transport method

The invention relates to a BNCT-related low-energy charged particle beam transport system and a BNCT-related low-energy charged particle beam transport method. The accelerator emits a low-energy charged particle beam of 5 MeV or less, and the beam transport line transports the charged particle beam emitted by the accelerator. The target contains lithium, and receives irradiation of the charged particle beam transported by the beam transport line to generate a neutron beam. The energy reduction system reduces the energy of the neutron beam generated by the target to a thermal neutron range. The beam collecting lens is located inside the beam transport line and is composed of a specified number of quadrupole electromagnets arranged in the irradiation direction of the charged particle beam from the upper end of the charged particle beam and a specified number of octupole electromagnets arranged in the irradiation direction of the charged particle beam from the quadrupole electromagnet at the rear end of the char