Patent ID: 9607719
Date: 2017-03-28
CPC Classifications: G21B,G21D,Y02E

Claim:
1. A vacuum chamber for containing plasma comprising a cylindrical chamber wall having first and second ends, the chamber wall extending radially around an interior volume and being formed of metal, and a plurality of insulating breaks extending axially along the chamber wall between and in spaced relation with the first and second ends, wherein each of the plurality of insulating breaks includes a slot extending from an exterior surface of the chamber wall through the chamber wall to the interior volume of the vacuum chamber, wherein each of the plurality of insulating breaks includes an insulating material inserted into the slot of the insulating break to prevent the formation of an azimuthal current in the chamber wall substantially in the area of the chamber wall in which the slots extend, and a plurality of metal shrouds positioned within the interior volume and over the insulating material of each of the plurality of insulating breaks, wherein each of the plurality of shrouds being coupled at opposing ends to the chamber wall adjacent opposing ends of the slot of each of the plurality of insulating breaks.