A Novel Design of 17.5 kV HV Feedthrough for Arjuna 2.0 (Saefurrochman, et.al) p-ISSN: 1410-6957, e-ISSN: 2503-5029 http://ganendra.batan.go.id 21 A NOVEL DESIGN OF 17.5 KV HV FEEDTHROUGH FOR ARJUNA 2.0 DESAIN TERBARU HV FEEDTHROUGH 17.5 KV UNTUK ARJUNA 2.0 Saefurrochman 1 , Darsono 1 , Suhadah Rabi’atul Adabiah 1 , Elin Nuraini 1 , Sutadi 1 , Tanti Ardiyati 2 1 Center for Accelerator Scince and Technology – National Nuclear Energy Agency of Indonesia, Jalan Babarsari Kotak Pos 6101 Ykbb, Yogyakarta, Indonesia 55281 2 Center for Nuclear Facilities Engineering - National Nuclear Energy Agency of Indonesia, Kawasan Puspiptek Gedung 71 Lantai 2, Tangerang Selatan, Indonesia E-mail : saefurrochman@batan.go.id Received 1 February 2021, Received in revised form 21 February 2021, Accepted 23 February 2021 ABSTRACT 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 × 10 6 V/m and 1 × 10 5 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. Keywords: feedthrough, Arjuna 2.0, electric field, Cockcroft Walton ABSTRAK DESAIN TERBARU HV FEEDTHROUGH 17,5 KV UNTUK ARJUNA 2.0. Desain terbaru dari feedthrough 17,5 kV untuk generator Cockcroft Walton Arjuna 2.0 telah diusulkan. Feedthrough digunakan untuk menghubungkan keluaran osilator transformer RF (di luar bejana horisontal) dengan masukan pengali tegangan (di dalam bejana horisontal) dari generator Cockcroft Walton. Feedthrough ini dilengkapi dengan penutup pada sisi kiri dan kanannya. Feedthrough yang didesain sederhana, kompak, dan mudah dibuat, serta memiliki kinerja yang tinggi untuk mencegah terjadinya flashover. Feedthrough terbuat dari teflon (PTFE) dan tembaga padat, yang memiliki kekuatan dielektrik yang tinggi, mampu menahan beban tekan, dan mudah dibuat. Jarak terpendek antara ground dan konduktor secara radial adalah 43,25 mm dan 253,5 mm untuk permukaan feedthrough. Desain ini diverifikasi oleh perangkat lunak Finite Element Method kemudian dilanjutkan dengan pengujian kinerja. Berdasarkan simulasi, tekanan tegangannya tinggi sekitar 16 kV hingga 17,5 kV pada konduktor feedthrough dan 0 hingga 3 kV pada flens feedthrough. Medan listrik feedthrough dengan tutup lebih rendah dari feedthrough tanpa tutup. Medan listrik tertinggi dan terendah masing-masing adalah 1.26 × 10 6 V/m dan (sekitar) 1 × 10 5 V/m. Selanjutnya, feedthrough telah diuji hingga 120 kV dan tidak terjadi pelepasan. Desain ini dapat dioperasikan dengan daya 17,5 kV dan telah berhasil dipasang pada generator Cockcroft Walton Arjuna 2.0. Kata Kunci: Feedthrough, Arjuna 2.0, medan listrik, Cockcroft Walton INTRODUCTION enter for Accelerator Science and Technology - National Nuclear Energy Agency Indonesia (CAST) is developing an electron beam accelerator for pre-vulcanization natural rubber latex (Arjuna 2.0) with energy of 300 keV/20 mA [1]. In Arjuna 2.0, 300 kV of Cockcroft Walton generator is used to accelerate electron beam. Slightly different from the widely used Cockcroft Walton generator, the voltage multiplier of the Cockcroft Walton generator is installed horizontally with the aim to simplify the maintenance. C