HIT Linac upgrade

During commissioning of the HIT-Linac [1] the maximum achievable transmission was about 20%. The reasons were the poor performance of the ion sources, the field errors of the solenoid matching the beam to the RFQ, the radial matching section of the RFQ itself and the deformed electrodes due to mechanical stress on the tank. Thus a detailed upgrade program was defined and started in 2007 (see Table 1).