A NOVEL DESIGN OF 17.5 KV HV FEEDTHROUGH FOR ARJUNA 2.0

A NOVEL DESIGN OF 17.5 KV HV FEEDTHROUGH FOR ARJUNA 2.0. A novel design of the 17.5 kV HV
feedthrough for Arjuna 2.0 Cockcroft Walton generator has been proposed. The HV feedthrough is used for
connecting the output of RF transformer oscillator (in the outside of horizontal vessel) with the input of voltage
multiplier (inside of horizontal vessel) of the Cockcroft Walton generator. It was equipped with covers on left
and right side. The designed feedthrough was simple, compact, and easy to manufacture, and had high
performance to prevent flashover. It was made from teflon (PTFE) and solid copper, which have high dielectric
strength, capable of withstanding press loads. The shortest distance between grounding with conductor radially
was 43.25 mm, and 253.5 mm for feedthrough surface. The design was verified by Finite Element Method
software and followed by performance testing. According to the simulation, high voltage stresses about 16 kV
to 17.5 kV are observed at feedthrough conductor, while the voltage stress at the feedthrough flange is
considerably smaller, about 0 kV to 3 kV. The electric field of the covered feedthrough is lower than the
coverless feedthrough. The highest and lowest electric fields are 1.26 × 106 V/m and 1 × 105 V/m, respectively.
Furthermore, feedthrough has been tested up to 120 kV and no discharge occurred. The design can be
operated at 17.5 kV and has been successfully installed on Arjuna 2.0 Cockcroft Walton generator.