Measurement of the SMH16.3 Magnetic Septa

The fast extraction septum PE.SMH16 is used to deflect protons and ions for the extraction transfer line TT2 from SS16 [1] [2]. Within the task of completing the impedance model of the PS, an impedance analysis of this existing machine element was required, however, since this is a long-existing element, only paper documentation of the septa is available. Due to the envisaged change of the PS layout which would lead to a replacement of the SMH16 [3] with an eddy current septa, a full modeling of this geometry for detailed EM-analysis and calculation of beam impedance was omitted. Instead, wire measurements have been carried out on the PE.SMH16.3 tank which shall provide sufficient information of the existing impedance contribution. As of today, four SMH16 exist at CERN of which one is installed in the PS in the location SS16, whereas the others remain as spares.