Abstract: There is provided an anode for a magnetron, the anode comprising: a cylindrical shell defining a longitudinal axis, a centre of the shell for accommodating a cathode of the magnetron; a plurality of vanes arranged at angular intervals around the shell, wherein an angular separation between each vane and its adjacent vane is configured to provide a cavity resonator of the magnetron, wherein each vane has a width extending radially inwardly from the shell toward the centre of the shell, and has a length extending longitudinally in parallel with the longitudinal axis of the shell; and a plurality of annular strap rings for setting a resonant mode spectrum of the cavity resonator, wherein the strap rings are arranged at longitudinal intervals and concentrically with the longitudinal axis of the shell, wherein alternate vanes are configured to support the alternate strap rings, such that each vane couples alternate strap rings and each strap ring couples alternate vanes, wherein a cross-sectional dimension of at l

Abstract: There is provided herein an anode for a magnetron, the anode comprising: a cylindrical shell defining a longitudinal axis, a centre of the shell for accommodating a cathode of the magnetron; a plurality of vanes arranged at angular intervals around the shell, wherein an angular separation between each vane and its adjacent vane is configured to provide a cavity resonator of the magnetron, wherein each vane has a width extending radially inwardly from the shell toward the centre of the shell, and has a length continuously extending longitudinally in parallel with the longitudinal axis of the shell; and a plurality of annular strap rings for setting a resonant mode spectrum of the cavity resonator, wherein the strap rings are arranged at longitudinal intervals and concentrically with the longitudinal axis of the shell, wherein each vane comprises an inner vane segment arranged to face the cathode and a respective outer vane segment connected to the inner vane segment and interposed between the inner vane segmen

Abstract: An electrical arrangement, which may, for example be a magnetron, has a sealed chamber and electrically insulating fluid contained within the chamber. A temperature expansion compensation bladder comprising a helical tube is located within the chamber, the helical tube having an end open to ambient atmosphere outside the chamber, and having a closed end within the chamber.

Abstract: An electrical arrangement, which may, for example be a magnetron, has a sealed chamber 12 and electrically insulating fluid contained within the chamber. A temperature expansion compensation bladder comprising a helical tube 13 is located within the chamber 12, the helical tube 13 having an end 15 open to ambient atmosphere outside the chamber 12 and having a closed end 14 within the chamber.