  The new 1.4 MeV/u front end HSI (HochStromInjektor) of the Unilac accelerates
ions with A/q ratios of up to 65 and with beam intensities in emA of up to 0.25
A/q. The maximum beam pulse power is up to 1300 kW. During the stepwise linac
commissioning from April to Septem-ber 1999 the beam behind of each cavity was
analysed within two weeks. A very stable Ar1+ beam out of a vol-ume plasma
source MUCIS was used mainly. The meas-ured norm. 80 % emittance areas around
0.45 pi mm mrad are close to the results from beam simulations. Up to 80 % of
the design intensity at the linac exit were achieved. In February 2000 an U4+
beam from the MEVVA source was accelerated for the first time.
