SNS Ring and transport system magnet acceptance and installation preparation

Installation of the magnets in the SNS-Ring, or any accelerator, requires quality assurance to minimize problems. The geometry of the ring was frozen and the dipole length was adjusted to reflect the measured dipoles magnetic length to aid the installation process. The approach established here is based on the Magnet Acceptance procedures used for RHIC [1]. The magnets are first measured and checked on the bench for mechanical and electrical characteristics, field strength, multipole strengths, survey, etc. Each group performing these measurements determines whether the magnet is within the design specifications. A magnet that passes is accepted. A magnet that fails may be accepted if the problem can be either repaired or reworked and retested to specifications. Such a magnet is classified as a spare or fixed. Furthermore, once accepted, these magnets are assembled into units such as the full half cell assemblies before being shipped for installation. These assemblies have a checkout list as well.