Some Mechanical Design and Construction Aspects of the MIT-LNS Linac

A high degree of RF phase stability, throughout a high-average-power, physically large, microwave system requires careful attention to the design of the mechanical joints, supports and anchors, and of the numerous branches of its widely dispersed heat transfer network. The major designs discussed are: the 180m long coaxial drive line supports, anchors and thermal enclosure (for ± 1° phase stability,), the rectangular and disk loaded waveguide heat transfer and mechanical support designs, and the two 190 1/s cooling water systems that are designed to maintain temperatures at 36 ± 0.9°C and 45 ± 0.1°C, respectively.