The superconducting interaction region magnet system for the CESR phase III upgrade

In 1998 CESR and the CLEO detector will commence another major upgrade to bring their performance up to B factory levels. New interaction region (IR) insertion magnets were designed to allow the highest possible luminosity from an equal energy, crossing angle, bunch train configuration of CESR. The new magnets will have some unusual capabilities such as nested skew and dipole coils for coupling and orbit correction, and a cryostat positioning system which can adjust the position of the magnets during operation. So we expect to see increases to the data taking time due to the higher functionality: energy changes, coupling correction, magnet alignment and positioning, and beam steering will be far easier and faster. However, the intimate magnetic and mechanical coupling with the CLEO solenoid has caused design complications as well.