The drift tubes of the D.I.S electron beam ion source EBIS-C1 can be ramped up to a voltage U of 10 kV and the whole range can be used for generating ions, starting at 10 V. The resulting kinetic energy of the extracted ions depends on that voltage and the charge state q of the ions, calculated via U×q. The energy of singly-charged ions can reach up to 10 keV while when considering for example a Xe³⁰⁺ ion a kinetic energy of up to 300 keV is possible.