gas focusing


Also found in: Wikipedia.

gas focusing

[′gas ‚fō·kəs·iŋ]
(electronics)
A method of concentrating an electron beam by utilizing the residual gas in a tube; beam electrons ionize the gas molecules, forming a core of positive ions along the path of the beam which attracts beam electrons and thereby makes the beam more compact. Also known as ionic focusing.
References in periodicals archive ?
Throughout 2014, youth leaders have been meeting to discuss the issue of oil and gas focusing on ways to maximize the benefits of potential resources to improve the lives of Lebanese.
For example, Saint Joseph University has developed a master's program in oil and gas focusing on exploration, production and management, while the American University of Beirut has expanded several existing programs such as petroleum geology and petroleum engineering.