Laser chamber insulator with sealed electrode feedthrough

An apparatus for conducting high electric power through the wall of a sealed chamber of an electric discharge laser to an elongated electrode inside the chamber, defining an electrode length, comprising:

• a two piece main insulator of an electrically insulating material larger than said electrode length, said main insulator comprising a first piece and second piece each of said first piece and said second piece comprising:
• a) a first polished substantially planar surface portion and a second polished substantially planar surface portion substantially parallel to said first polished substantially planar surface portion;
• and
• b) a plurality of substantially cylindrical feedthrough insulator portions integral with said first piece and said second piece, respectively and extending from said first polished substantially planar surface portion on each of said first piece and said second piece, respectively;
• wherein a substantially cylindrical hole extends substantially coaxially through said each of said cylindrical feedthrough insulator portions and through said first and said second polished substantially planar surface portions,
• wherein each of said first piece and said second piece is pinned to said wall near a central portion of said first piece and said second piece, respectively, and wherein each of said first pieces and said second piece comprises anti-tracking groves interlocked with each other.