A HIGHLY AUTOMATED MEASURING SYSTEM FOR THE LEP MAGNETIC LENSES

Abstract

The quadrupole and sextupole magnets of LEP will be measured by the harmonic coi1 method. In order to achieve precise, reliable and rapid measurements of the strength, field quality and magnetic axis of the lenses, a fully autonomous, microprocessor controlled system has been developed. Remote control of the alignment of the magnets on their measuring bench has been builtin, thanks to the use of electronic level gauges and of a laser beam as reference axis. The latter is used for positioning the reference targets of the quadrupoles with respect to their magnetic axis. Design and performance of the mechanical and electronic equipment are presented.