Beam monitors for the S-band test facility

The design of electromagnetic monitors for observation of beam charge and position of single bunches in long bunch trains is presented. With a repetition rate of 50 Hz, each of the 125 bunches in the linac´s macropulse has to be observed simultaneously. Resistive wall current and button pick-up stations will monitor the beam along the injector. Betweeen the S-band acceleration structures precision stripline pick-ups will be used. Here a one micron position resolution within 16 ns bunch-to-bunch spacing may be obtained in combination with well matched broadband rf-electronics. For future linear colliders these bunch by bunch measurements are required to fulfill the constraints given by advanced beam-based alignment techniques.