Design and construction of the NSTX bakeout, cooling and vacuum systems

This paper will describe the design, construction and initial operation of the NSTX bakeout, water cooling and vacuum systems. The bakeout system is designed for two modes of operation. The first mode allows heating of the first wall components to 350/spl deg/C while the external vessel is cooled to 150/spl deg/C. The second mode cools the first wall to 150/spl deg/C and the external vessel to 50/spl deg/C. The system uses a low viscosity heat transfer oil which is capable of high temperature low pressure operation.