The document summarizes an experiment on the breakdown of liquid nitrogen as a dielectric material under nanosecond durations. It describes the experimental setup used, including the pulsed reflectometry method to synchronize voltage and current measurements. The experiment focuses on investigating breakdown dynamics in liquid nitrogen between parallel plate electrodes, including estimating electron multiplication rates and discharge times. Results are compared between liquid and gaseous nitrogen to reveal features of breakdown in the liquid state.

1. Kegagalan Cairan Nitrogen Sebagai Bahan Dielektrik pada
Durasi Waktu yang Sangat Singkat
Syamsir Abduh
Jurusan Teknik Elektro-FTI Universitas Trisakti, Jakarta
E-mail : syamsir@trisakti.ac.id;the_abduh@hotmail.com
Telp/Fax : 021-5663232 Ext. 421/021-5605841
Abstract
This rapid communication reports on nanosecond breakdown in liquid nitrogen at 77 Kelvin degree and
atmospheric pressure. The key features of the experimental system established to undertake this work have been
described along with the measuring technique employed. Attention is given to pulsed reflectomery method, and in
particular the problem of synchronizing the current and voltage signal with a high degree of accuracy is examined
in detail. The breakdown occurs in gap geometry with plane electrodes and a variable inter electrodes distance. The
focus is on investigation the breakdown dynamic, numerically estimating the electron multiplication rates and
determining the discharge takes to bridge the gap. The experimental results obtained for gaseous and liquid
nitrogen under conditions are compared to reveal some specific features of the breakdown dynamic in liquid
nitrogen.
Keyword: liquid nitrogen, dielectric.