Facility for heavy ion collision experiment at RAON

The RIB (rare isotope beam) accelerator and experimental facility in Korea, called RAON, will use both isotope separation on-line (ISOL) and in-flight fragmentation (IF) methods for rare isotope production. The Large Acceptance Multipurpose Spectrometer (LAMPS) at RAON is for studying nuclear symmetry energy of nuclear matter via heavy-ion collisions by using rare isotope beams. In order to achieve its physics goal, the LAMPS experimental setup needs to measure simultaneously various particles like pions, proton, neutron, heavy fragments from heavy-ion collisions. Two different experimental setups of LAMPS are designed for covering the entire energy range. One is for low energy (< 18.5 MeV/nucleon) heavy-ion collision experiment for day-1 experiments. This experimental setup consists of an array of ΔE-E Si-CsI detectors, a gamma array to cover backward polar angle, and a forward neutron wall. The other is for completing an event reconstruction by detecting all the particles produced in high energy heavy-ion collisions (from 18.5 and up to 250 MeV/nucleon) within a large acceptance angle to measure particle spectrum, yield, ratio and collective flow of pions, protons, neutrons, and intermediate fragments. The experimental setup consists of a superconducting spectrometer, a dipole spectrometer, and a forward neutron wall. A Time Projection Chamber (TPC) will be placed inside of superconducting solenoid magnet of 0.6 T for charged particle tracking. The dipole spectrometer will be located forward of the superconducting spectrometer and it will be composed of a combination of quadrupole, dipole magnets, focal plane detector, tracking stations, and Time-of-Flight detector at the end. The neutron wall will be made of 10 layers of plastic scintillators for neutron tracking