High-power beam dump system for the BigRIPS fragment separator at RIKEN RI Beam Factory

The high-power beam dump system for the BigRIPS fragment separator at the RIKEN Nishina Center RI Beam Factory was designed to handle ion beams up to 238U at 345 MeV/nucleon and intensity of 1 particle μA. A water-cooled stationary beam dump system utilizing screw or swirl tubes as water cooling channels was developed based on detailed thermal simulation. Since March 2007, the system has been successfully operated with the various beams at the RI Beam Factory (RIBF), although the available beam power remains less than one-tenth of the goal. Temperatures of beam spots at the beam dump were measured and compared with the thermal simulations to evaluate the cooling capacity of the systems.