The turbomolecular pump in molecular state

A new approach and successful method of studying the turbomolecular vacuum pump. Gaede’s equations and Becker’s treatment lead to two equations k=f,(u, s, g) andS =f2(uo, s, g), which connect the compression ratio k and the pumping speed S with the rotational speed uo, the tangents of the blade’s angle and the geometry g of such a pump. The design of a turbomolecular vacuum pump is then possible through its geometry and its losses. 1