Patent ID: 6053241
Filing Date: 2000-04-25
Classification: F28F,G02B,H01J

Abstract:
A method comprising the steps of as follows:providing cooling of a deflection system for a particle beam with said system including deflection devices (D) contained in a lens housing (LH') by surrounding said deflection devices (D) in said lens housing (20) with a static vibration free coolant (SC),providing said lens housing (LH') on the exterior thereof with an exterior cooled heat exchange structure (HE) having high thermal conductivity through which fluid coolant circulates at high velocity, said exterior heat exchange structure (HE) being spaced away from said deflection devices (D) of said deflection system,providing a high thermal conductivity structure (CP) located within said static vibration free coolant (SC) and attached to said exterior heat exchange structure (HE), andtransmitting heat away from said deflection devices (D) by convection of heat through said static vibration free coolant (SC) to said high thermal conductivity structure (CP) and said heat passing from said coolant (SC) to said heat exchange structure (HE) through said high thermal conductivity structure (CP).