Overview of the cryogenic system for the ariel e-linac at TRIUMF

The Advanced Rare IsotopE Laboratory (ARIEL) is a major upgrade of the existing ISAC radioactive beam facility. After completion, ARIEL will triple TRIUMF's capability of the rare isotope production for the needs of the international scientific community. The key feature of this upgrade is the 50 MeV 10 mA continuous-wave (CW) electron linear accelerator (e-linac) utilizing superconducting bulk niobium technology at 1.3GHz. This paper presents the proposed layout of the e-linac cryogenic system including details of the accelerator cryomodules, estimated heat load of the helium refrigerator, and the description of the helium and LN₂ storage and distribution systems with requirements for major components.