Provided is a novel method for nucleating the growth of a diamond film. The passive gas flow system has a gas inlet to drive gas into the passive gas flow system when the component moves in the first direction and a gas outlet, connected to the gas inlet by a gas conduit, to direct the gas that is driven into the passive gas flow system in a certain direction. A battery state of charge controller receives the difference between a battery state of charge set-point and the actual battery state of charge, and provides a battery power signal that attempts to maintain the battery state of charge at the set-point.