SECAR

The SECAR system consists of 8 Dipole Magnets (red components in the diagram), 15 Quadrupole Magnets (yellow), 5 Multipole Magnets (light blue), and two Velocity Filters (dark blue). The first set of dipole magnets in SECAR performs a critical charge-state selection of both the recoils and unreacted projectiles that enter the SECAR system. The primary projectile rejection components of SECAR are the two Velocity Filters. These devices, also known as Wien Filters, have a vertical magnet field B and a horizontal electric field E that together serve to deflect the trajectory of any particles with a velocity different than E/B. By appropriately tuning these fields, the unreacted beam particles that enter the system can be deflected away while the reaction products of interest (recoils) are passed through to eventually reach the focal plane. Since the unreacted beam particles have an intensity of 10 13 - 10 17 higher than the capture reaction recoils of interest, the SECAR design includes..