F.2.4 BODY REFLECTOR AND HEAT SHIELD This is needed in the solenoid tube to protect the waveguides and surrounding structure from heat generated in the solenoid. The reflector is a second molybdenum core extending from the start of the tube to the body radiator, and at its base is 5 cm larger in radius from the body. Using lengths 80. 7 cm and 66. 2 cm, respectively, the weight is thus 442 g (16 kW tube) and 714 g (43 kW tube). F. 3 WEIGHT OF HEAT PIPES The assumptions made are: a. Heat pipes surround all the cavities in the solenoid-focused tube (length 62 cm) and the output cavity only in the PPM tube (length 4 cm). b. The inner radius equals 3 cm and the outer radius equals 4 cm (cross-sectional area ). c. Heat pipes line the back of the body radiator: total length 10 x the radiator radius; cross-sectional area 2 sq. cm. d. Density equals 2.2 g/cm as for cesium. e. Linear body dimensions for the 16 kW tube scale down by a factor (since proportional to beam speed) from the 43 kW tube. Then the following weights are calculated.
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