An X-ray source and an X-ray apparatus with an X-ray source are provided, the X-ray source includes a liquid metal target which flows through a system of ducts and is conducted through a duct section which has a flow cross-section that is reduced relative to that of the system of ducts. The method comprises the addition of R and X-Channel transients and offsets to the relaxation model appropriate for a user selected pulse sequence. Thereby, the amount of a leakage current modifying the gate potential of the other transistor can be reduced, and a malfunction of the pulse signal output circuit can be prevented. The seam allowance margin is folded through the openingshape to the reverse side, and a second piece of fabric is affixed to the folded margin.