THE BEAM-HANDLING MAGNET SYSTEM OF THE KEK PS NEW EXPERIMENTAL HALL

Construction work on the new counter experimental hall of the KEK 12-GeV Proton Synchrotron (KEK-PS) was completed in December 1990. The new hall was planned to be a mini kaon factory from the start. The beam-handling magnet system of the hall was thus equipped with newly developed radiation-resistant magnets in order to handle a high-intensity proton beam. Another important point regarding high-intensity beam handling is to realize easy maintenance of the beam line. For this purpose, all magnets of the primary proton beam line were mounted on special base plates on which quick-disconnect devices for electric power, cooling water, and interlock signals were assembled. The vacuum connections of the beam ducts located at both ends of the magnet are also operated remotely. Any magnet experiencing trouble can thus be easily removed from the beam line and repaired remotely. >