Specifications include, but are not limited to: The Helically Symmetric Experiment (HSX) Laboratory at the University of Wisconsin - Madison (Buyer) is seeking to procure a power supply from a qualified supplier (supplier) which will power an existing high power microwave vacuum tube (Gyrotron), model VGE-8071, manufactured by Communications & Power Industries (CPI) Microwave Power Products Division. HSX is a device used to explore the physics basis of nuclear fusion as an energy source. The experiment uses magnetic fields to confine high temperature plasmas of several million degrees. The plasma is generated and heated using gyrotrons via electron cyclotron resonance heating (ECRH). HSX has recently acquired a 70 GHz gyrotron which is capable of injecting 300 kW into the plasma for about 100 ms. As shown in figure 1, the gyrotron generates microwaves using an intense electron beam (up to 20 A) with 80 keV that propagates through an intense magnetic field (2.7 T). The gyrotron operates with a body voltage of 20 kV and has to be connected to a main power supply, delivering 60 kV. While a 20 kV power supply is already available on site, a new 60 kV power supply is needed and is the subject of this document. The power supply is expected to generate ~100,000 pulses over 10 years.