Development of a wall current beam position monitor for a KAON Factory ceramic chamber

The rapid cycling synchrotron proposed for the TRIUMF KAON Factory uses a ceramic beam pipe to suppress eddy currents. One design has metallic strips fixed onto the inner surface to carry the wall currents. A beam position monitor (BPM) has been designed using these strips and tested successfully with the TRIUMF cyclotron beam. The external dimensions are identical to the chamber and the device may be located at the end of e.g. a quadrupole, reducing demands on available lattice space. The BPM exploits the technology used to fabricate the vacuum chamber and thus reduces construction expense.<>