physics with trapped highly charged ions up to fully stripped uranium ions (U92+), which includes: laser spectroscopy, mass measurements, g-factor measurements, recoil-ion momentum spectroscopy, and atomic [...] collision studies. HITRAP is an ion-trap facility for experiments on highly charged ions which is being constructed at the accelerator facility at GSI. GSI is an institute for heavy-ion research. In the experiment [...] highly charged ions will be stored, cooled and investigated in the magnetic field of a Penning trap. The experiments apply modern techniques like: production and storage of highly charged ions detection of