Patent ID: 8450701
Filing Date: 2013-05-28
Classification: B01D,H01J

Abstract:
1. A cold trap filter system for filtering one or more chemical species from a volumetric flow, comprising: a high vacuum pump in fluid communication with a chamber having a gas therein, wherein the gas includes the one or more chemical species disposed therein; a roughing pump in fluid communication with the high vacuum pump; one or more canisters in fluid communication with an exhaust of the high vacuum pump and an intake of the roughing pump; one or more coolant sources; one or more paddles positioned within the one or more canisters, wherein each of the one or more paddles comprises a respective cooling line in fluid communication with the respective one or more coolant sources, wherein the each of the one or more coolant sources is configured to selectively pass a coolant through the respective cooling line, thereby selectively cooling the respective one or more paddles to a predetermined temperature associated with a condensation point and/or deposition point of one or more of the one or more chemical species at the position of the respective one or more paddles; an electrical insulator, wherein the electrical insulator electrically insulates one or more of the one or more paddles from the one or more canisters; and an electrical power source operably coupled to one or more of the one or more paddles, wherein the electrical power source is configured to electrically bias the respective one or more paddles with respect to the one or more canisters, and wherein the electrical bias is configured to electrostatically attract one or more of the one or more chemical species to the respective one or more paddles.