X-ray source with a grid voltage unit

An X-ray source, comprising:

• a cathode facility configured to emit electrons, the cathode facility including:
• a first grid-switched cathode with a first grid configured to generate a first current of emitted electrons as a function of a first grid voltage, and
• a second grid-switched cathode with a second grid configured to generate a second current of emitted electrons as a function of a second grid voltage;
• a first anode region;
• a second anode region;
• at least one high voltage cable;
• a high voltage source configured to provide a high voltage in the high voltage cable for acceleration of the electrons, the high voltage cable connects the high voltage source and the cathode facility,
• the high voltage is greater than 10 kV, the high voltage source and the high voltage cable forming a capacitor configured to provide a generator current;
• and
• a grid voltage unit including an interface configured to receive a control signal, the grid voltage unit configured to regulate, via regulation of the first grid voltage at the first grid and via regulation of the second grid voltage at the second grid, a charge quantity available in the capacitor and the generator current as a function of the control signal.