the face that Turbomolecular pump are able to produce high vacuum , uncontaminated by back streaming and without the use of traps and baffles , makes them invaluable in certain application . examples are in clean surface science studies , gas analysis , certain semiconductor application and in fusion experiment. Other features the make these pumps attractive are their rapid operational readiness and relatively and certain models have been adapted and developed into models capable of dealing with corrosive or radioactive gases , for example