Ok, so physicists can create plasmas in a chamber with a temp. of 12,000F. Plasmas are easily manipulated with electric or magnetic fields. One type of manipulation shapes the plasma into a planar ,square shape like a window pane, called a 'plasma window'. These plasma windows can be used inside an air tight chamber to create a vacuum within this chamber. My question is how? My imagining is that the plasma window fills one entire side of the chamber then is pushed forward through the chamber, essentially 'sweeping' all the dust and particulate material to the far chamber end where the plasma forces it out through a valve which is then closed.