Monte - Carlo Study of the ( 102 ° , 90 ° ) Physics Optics for LEP in 1998

In 1998 LEP will be run using an optics with phase advances P x 102° and P y 90° in the arc cells. This note summarises the main results from the optics evaluation procedure that is now routinely applied to new LEP optics. This includes the study of the orbits, optics and dynamic apertures of an ensemble of imperfect machines with corrections similar to those applied in operation. It provides predictions of performance and results of measurements that can be done when the optics is commissioned. A single SF sextupole family is used in order to provide a baseline for comparison of the effects of re-cabling the sextupoles. This will be treated in a subsequent note.