Fluid cooled traveling wave tube

Claim 1

IN AN ELECTRON DISCHARGE DEVICE INCLUDING A SLOW WAVE PROPAGATING STRUCTURE, AN ELONGATED ELECTRODE COEXTENSIVE WITH THE STRUCTURE DEFINING AN INTERACTION SPACE THEREBETWEEN, AN ENVELOPE ENCLOSING SAID STRUCTURE AND ELONGATED ELECTRODE, ELECTRICALLY CONDUCTIVE MEANS MOUNTING SAID STRUCTURE TO SAID ENVELOPE, AND ELECTRICALLY INSULATING MEANS MOUNTING SAID ELONGATED ELECTRODE TO SAID ENVELOPE; MEANS MAINTAINING SAID STRUCTURE AND ELECTRODE AT PREDETERMINED TEMPERATURES COMPRISING A FIRST FLUID CONDUIT HAVING TWO ENDS ATTACHED TO THE OUTSIDE OF SAID ENVELOPE IN THERMALLY CONDUCTIVE RELATIONSHIP WITH SAID STRUCTURE, A SECOND FLUID CONDUCTIVE RELATIONSHIP WITH SAID STRUCTURE, A SECOND FLUID CONDUIT HAVING TWO ENDS ATTACHED INSIDE SAID ENVELOPE IN THERMALLY CONDUCTIVE RELATIONSHIP ONE END OF SAID FIRST CONDUIT, MEANS CONDUCTING AT LEAST A PORTION OF SAID FLUID FROM THE OTHER END OF SAID FIRST CONDUIT TO OEN END OF SAID SECOND CONDUIT, MEANS AT THE OTHER END OF SAID SECOND CONDUIT FOR CONDUCTING SAID PORTION TO A FLOW JUNCTION, AND MEANS INCLUDING A FLOW RESTRICTION AT THE OTHER END OF SAID FIRST CONDUIT FOR CONDUCTING THE REST OF SAID FLUID TO SAID JUNCTION TO JOIN FLOW FROM SAID SECOND CONDUIT WHEREBY SAID ELECTRODES ARE MAINTAINED AT SAID PREDETERMINED TEMPERATURES.