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Axial Magnetic Field About Plasma Secondary of Inductively Excited Laser

IP.com Disclosure Number: IPCOM000091474D
Original Publication Date: 1968-Feb-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Zarowin, CB: AUTHOR

Abstract

Ion gas laser devices usually include a plasma tube in the form of a topologically toroidal hollow tube having one region which is narrower in cross-section than the remaining portion of the tube. The tube contains a gas, for example, argon or an argon-xenon mixture at a suitable pressure and the gas within the tube is excited into the plasma state. One advantageous method of excitation is to create a changing magnetic field which passes through the loop of the plasma tube. The changing magnetic field produces a changing voltage in the gas in the tube. The changing voltage causes the electrons in the gas to move and collide with the ions in the gas and to give up to the ions the energy supplied by the magnetic field with the result that the gas is excited into the plasma state.

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Axial Magnetic Field About Plasma Secondary of Inductively Excited Laser

Ion gas laser devices usually include a plasma tube in the form of a topologically toroidal hollow tube having one region which is narrower in cross- section than the remaining portion of the tube. The tube contains a gas, for example, argon or an argon-xenon mixture at a suitable pressure and the gas within the tube is excited into the plasma state. One advantageous method of excitation is to create a changing magnetic field which passes through the loop of the plasma tube. The changing magnetic field produces a changing voltage in the gas in the tube. The changing voltage causes the electrons in the gas to move and collide with the ions in the gas and to give up to the ions the energy supplied by the magnetic field with the result that the gas is excited into the plasma state.

The changing magnetic field has heretofore been created by placing a number of coils of a winding around the narrow region of the tube and connecting the winding to a source of alternating current signal. The coils act as the primary winding of a transformer and the gas in the plasma tube acts as the secondary winding of the transformer.

In the plasma tube shown, primary winding 10 is wound about the entire plasma tube 12, rather than just around the active region of narrow portion 14. Winding 10 is connected to a source of AC signal 16 and creates a changing magnetic field in the secondary winding formed by the gas...