An anode assembly includes a rotatable hub having a rotation axis and having a cooling passage formed therethrough and a ferrofluid seal attached to the rotatable hub, the ferrofluid seal fluidically separating a first volume containing the target from a second volume. A target is attached to the rotatable...http://www.google.com/patents/US7508916?utm_source=gb-gplus-sharePatent US7508916 - Convectively cooled x-ray tube target and method of making same
