X-ray source with an electromagnetic pump

An electromagnetic pump for pumping an electrically conductive liquid, comprising:

• a first conduit section having an inlet and an outlet;
• a second conduit section having an inlet and an outlet;
• wherein each one of the conduit sections is arranged to provide a flow of the liquid from its inlet to its outlet;
• and
• wherein the outlet of the first conduit section is fluidly connected to the inlet of the second conduit section;
• the electromagnetic pump further comprising:
• a current generator arranged to provide an electric current through the liquid in the first conduit section and the liquid in the second conduit section such that a direction of the electric current is intersecting the flow of the liquid in the first conduit section and in the second conduit section;
• and
• a magnetic field generating arrangement arranged to provide a magnetic field passing through the liquid in the first conduit section and the second conduit section such that a direction of the magnetic field is intersecting the flow of the liquid and the direction of the electric current;
• wherein the first conduit section and the second conduit section are configured to provide an orientation of the flow of the liquid in the first conduit section that is opposite to an orientation of the flow of the liquid in the second conduit section.