MULTIPLE ELECTRON BEAM ION PUMP AND SOURCE

Patent · Tue Feb 27 04:00:00 EST 1962

OSTI ID:4816261

Ellis, R E

A vacuum pump is designed which operates by ionizing incoming air and by withdrawing the ions from the system by means of electrical fields. The apparatus comprises a cylindrical housing communicable with the vessel to be evacuated and having a thin wall section in one end. Suitable coils provide a longitudinal magnetic field within the cylinder. A broad cathode and an anode structure is provided to establish a plurality of adjacent electron beams which are parallel to the cylinder axis. Electron reflector means are provided so that each of the beams constitutes a PIG or reflex discharge. Such structure provides a large region in which incoming gas molecules may be ionized by electron bombardment. A charged electrode assembly accelerates the ions through the thin window, thereby removing the gas from the system. The invention may also be utilized as a highly efficient ion source. (AEC)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-16-008858
• Assignee: U.S. Atomic Energy Commission
• Patent Number(s): US 3022933
• OSTI ID: 4816261
• Country of Publication: United States
• Language: English

Related Subjects

AIR
ANODES
CATHODES
COILS
EFFICIENCY
ELECTRIC DISCHARGES
ELECTRIC FIELDS
ELECTRONS
ENGINEERING AND EQUIPMENT
ION PUMPS
IONIZATION
MOLECULES
PUMPS
VACUUM
VESSELS
WINDOWS