Tao Yue
Operation status of China Accelerator Facility for Superheavy Elements (CAFE2)
China Accelerator Facility for Superheavy Elements (CAFE2) is a state-of-the-art scientific facility dedicated to the synthesis and investigation of superheavy nuclei and elements. It features a continuous wave RFQ, a fully superconducting linac that comprises twenty three half-wave resonator cavities housed within four cryostats, and an experimental terminal. The linac is designed to achieve an energy of 6.5 MeV/u for ion species with an A/Q ratio approximately equal to 3.5. CAFE2 evolved from its predecessor, CAFe, which was initially a proton demo linac for accelerator driven systems. Following its upgrade in 2021, CAFE2 has accumulated over 10000 hours of operation time, providing heavy ion beams for superheavy element experiments at beam currents exceeding 10 upA. This talk will review the operation of CAFE2 and highlight the efforts to enhance the stability and tuning efficiency of high-intensity heavy ion beams.
Development for iLinac of HIAF Project at IMP
The Superconducting Ion Linac (iLinac) of High Intensity Heavy-ion Accelerator Facility (HIAF) is composed of an ECR ion source, low energy beam transport line (LEBT), 81.25MHz radio frequency quadrupole (RFQ) accelerator, medium energy beam transport line (MEBT) and superconducting section composed by Quarter Wave Resonators (QWR007) and Half Wave Resonators (HWR015). The 238U35+ beam is accelerated by the RFQ accelerator from 0.014 MeV/u to 0.8 MeV/u and then to 17 MeV/u by 96th SC cavities. The room-temperature front end of the iLINAC has been assembled and successfully produced a beam at present. Three cryostats have been installed in the tunnel.