PRELIMINARY TESTING OF COILS FOR THE SUPERCONDUCTING TOROIDAL MAGNET FOR THE CEBAF LARGE ACCEPTANCE SPECTROMETER (CLAS)

The design of the six coil superconducting toroidal magnet, which is t o be installed at CEBAF, Virginia, was reported by Oxford Instruments and CEBAF at the Applied Superconductivity Conference in Chicago in 19 92. This paper outlines the progress being made in the manufacture and describes the testing at Oxford Instruments of some of the first coil s produced. individual coils are being tested to full current rating w hich generates a field of 2.8 T; this is just below the peak field in the six coil array (3.5 T). The auxiliary systems - the service module , the power supply, and the control and instrumentation system will al so be fully tested before shipment.