Patent ID: 6998621

Claim:
A device for influencing an electron beam, comprising a support body for positioning in the vicinity of an electron beam, beam influencing means supported by the body and operable by electrical energy to influence the beam when the body is so positioned and cooling means for counteracting temperature rise in the body due to operation of the influencing means, but without inducing vibration adversely affecting the stability of beam position, the cooling means comprising a pipe extending externally around and thermally conductively coupled to the body and serving to conduct coolant for heat exchange with the body over at least a major part of the peripheral area thereof substantially without transmission of vibration to the body and displacing means for movement of the coolant through the pipe in a substantially laminar flow, wherein the pipe is bonded to the support body by adhesive means and wherein the body and the pipe are made of different materials and the adhesive means comprises a first adhesive precoated on the exterior of the body and a second adhesive bonding the pipe to the precoating provided by the first adhesive.