Radiation hardened septum magnet

A septum magnet, used to separate a pion beam from a high intensity proton beam, has been designed, built and tested at TRIUMF. Because the proton beam intensities can exceed 100 mu a, and it is anticipated that approximately 1% of the beam will be split on the septum magnet, all components of the magnet have to be radiation hard (i.e., inorganic). To achieve this, the conductors are insulated from each other using metallized ceramic insulators. Because of the complex shapes of the conductors and the large number of insulators required, it was necessary to jig braze all of the insulators simultaneously in a vacuum furnace. Results of internal and leakage field calculations and measurements are discussed. 4 refs.