Orbitron pump

from Wikipedia, the free encyclopedia

The orbitron pump is a vacuum pump that is used in high vacuum technology.

functionality

The orbitron pump is a special form of an ion getter pump . In a Orbitronpumpe ionize electrons , located in the electric field between the concentrically arranged cylindrical anode and cathode move along a circular path, the residual gas. The electrons emerge from the hot cathode and revolve around the anode on a path that is greatly lengthened by the circular movement before they hit the anode surface - which is usually made of titanium . The titanium is vaporized in the recipient . On their long way around the anode, the electrons ionize the gas atoms or molecules they encounter. The electrical field between the anode and cathode moves the ionized gases onto the housing wall and implanted them into the fresh titanium getter layer that has been vapor-deposited there, and in this way removed them from the recipient.

The pumping capacity of an orbitron pump is relatively low , especially with noble gases that are difficult to ionize .

The name Orbitron is derived from the Latin "orbis" (cycle, circular motion) and the Greek suffix -tron (device, tool) and means continuous circulation, which indicates the functional principle - the principle of continuous circulation.

Individual evidence

  1. ↑ a b Wutz manual vacuum technology: theory and practice. Karl Jousten (editor), Verlag Vieweg + Teubner, 9th edition, 2006, ISBN 3-834-80133-X , pp. 394–395.

literature