APPENDIX F KLYSTRON THERMAL CONTROL SYSTEM F. 1 HEAT CONDUCTION Consider a cavity end wall as a hollow cylinder with: assuming a uniform distribution of the heat across wall (parallel to the axis of the tube). For example, in the 43 kW klystron, it is seen that The total heat dissipated in the output cavity is 2420 watts (adding 600 watts to the skin heat of Table E-2 to account for interception), giving a temperature rise of 111 degrees in each wall. If the outer temperature is 300°C, the inner temperature is 411 °C and the tunnel tips would be even hotter. With thicker walls, the heat flow would be concentrated near the cavity. Hence fluid or heat-pipe cooling is necessary.
RkJQdWJsaXNoZXIy MTU5NjU0Mg==