Accelerator Driven Advanced Nuclear Energy System (ADANES) is to realize the transmutation of nuclear waste and the regeneration of nuclear fuel. ADANES can flexibly connect with the existing nuclear power system to achieve the goal of continuous and minimum waste discharge for the nuclear power system. A new sub-critical reactor concept is proposed as high power beam with one accelerator splitting into multiple beams to drive the sub-critical reactor, which is so called Multi-Beam Accelerator Driven System (MB-ADS). Based on the concept of MB-ADS, a fuel cycle system integrating transmutation and proliferation was developed, and efficient transmutation of minor actinide and spent fuel regeneration were realized at the same time. In this paper, the progress of the MB-ADS as well as the high reability accelerator and Multi-Beam beam line are presented.

Research on heavy ion linac was began more than ten years ago initially to improve the HIRFL operation at IMP. In China, the first continuous wave (CW) heavy ion linac, SSC Linac, working at 53.667 MHz was designed and constructed as the SSC injector. The ion particles can be accelerated to 1.48 MeV/u with the designed A/q≤5.17. At present stage, this CW linac has been put into operation and the Uranium has been accelerated to 1.48 MeV/u successfully in the end of 2023. To meet the rising requirements of the applications, a compact 162.5 MHz heavy ion linac operating in pulse mode was developed with A/q≤3. The “KONUS” beam dynamics was adopted in the IH-DTL design and the heavy ions can be accelerated to 4 MeV/u in 9m length. The 108.48 MHz SESRI linac was another pulse machine which was built at Harbin. Both of the heavy ions and proton beam can be accelerated by this linac to 2 MeV/u and 5.6 MeV, respectively. In this paper, the status of these three heavy ion linacs and their beam commissioning results were presented.

A 162.5 MHz, optimal beta = 0.19 pure niobium half-wave resonator (HWR) called HWR019 for the superconducting driver linac of the China initiative Accelerator-Driven subcritical System (CiADS) has been designed and analyzed at the Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS). The linac requires 24 HWR019s to accelerate protons from 6.8 MeV to 45 MeV. This paper mainly presents a design scheme of HWR019. Meanwhile, electromagnetic field optimization, and mechanical structure design are carried out, to predict the behavior of the cavity under practical operating process. At present, this superconducting cavity has been fabricated a prototype and awaits further testing.

The Quadrupole Resonator (QPR), originally developed at CERN, is a dedicated radio-frequency characterization equipment for evaluating superconducting material. It employs the calorimetric compensation technique and has a surface resistance resolution of less than 1 nOhm, operaing over a wide range of parameters, such as tem-peratures, resonant frequencies and magnetic fields. As a part of R&D work of superconducting material for SRF application in particle accelerators. A QPR with operating frequency of 325 MHz has been developing at Institute of Modern Physics (IMP), CAS. In this paper, we present the detailed electromagnetic design of the QPR, the design focuses on reducing the risk of multipacting, field emis-sion (B_pk/E_pk) and mode overlapping (delta f = f_QPR-f_dipole), enhancing the attainable peak magnetic field (B_sample/B_pk). The electromagnetic simulation results indicate that the optimized structure has good electromagnetic performance. Additionally, the coupler design compatible with four QPR modes will be introduced. The cavity will be fabricated soon.