Concept
Time-domain reflectometer
Related publications (33)
Validation of short-pulse reflectometry turbulence measurements with a synthetic diagnostic
Stefano Coda, Stephan Brunner, Oleg Krutkin, Umesh Kumar, Mackenzie Peter-Fulford Van Rossem, Samuele Mazzi
Experimental measurements of the turbulence amplitude utilizing a short pulse reflectometry method are presented. Two discharges with shaped plasma possessing opposite signs of triangularity are considered and a higher turbulence amplitude is found in the ...
Bristol2024Electromagnetic time reversal for online partial discharge location in power cables: Influence of interfering reflections from grid components
Marcos Rubinstein, Farhad Rachidi-Haeri
In online single-sided partial discharge (PD) location, the measured PD reflection patterns are affected by the characteristics of all the components of the associated power network. This paper analyses the performance of a PD location method based on elec ...
2024An Effective EMTR-Based High-Impedance Fault Location Method for Transmission Lines
This article summarizes the electromagnetic time-reversal (EMTR) technique for fault location, and further numerically validates its effectiveness when the fault impedance is negligible. In addition, a specific EMTR model considering the fault impedance is ...
2021High resolution density pedestal measurements during edge localized modes by short-pulse reflectometry in the TCV tokamak
Stefano Coda, Benoît Labit, Laurie Porte, Pedro Andres Molina Cabrera
This publication presents high spatio-temporal resolution (mm/μs) density profile measurements of the pedestal top during type I, III, and small edge localized mode (ELM) H- mode plasmas in the Tokamak à Configuration Variable (TCV). These measurements wer ...
2021Investigation of Electromagnetic Field Coupling to a Transmission Line Terminated with Non- Vertical Risers
Recently, a simple and efficient method was proposed to take into account non-vertical risers at the end of transmission lines through an equivalent partial inductance. This paper evaluates the frequency above which the inductance needs to be taken into ac ...
URSI2020The Upper Bound of the Speed of Propagation of Waves along a Transmission Line
According to theory, once certain conditions are fulfilled, current and voltage pulses propagate along ideal transmission lines with the speed of light. One can reach such a conclusion only when the conductors are assumed to be perfectly conducting, which ...
2020Tokamak plasma edge studies by microwave short-pulse reflectometry and backscattering
Moving towards an increased understanding of the dynamic processes in the edge of
tokamak plasmas requires continuous innovation in diagnostic capabilities, pushing the
envelope in both spatial and temporal dimenstions. Plasma density and rotation, and
the ...
EPFL2019Tower and Path-Dependent Voltage Effects on the Measurement of Grounding Impedance for Lightning Studies
Marcos Rubinstein, Antonio Sunjerga, Hamidreza Karami, Keyhan Sheshyekani
We present an analysis aimed at evaluating the effect of the presence of the tower on the measurement of the grounding impedance. The Numerical Electromagnetics Code NEC-4 is used for the full-wave modeling of the structure including the tower and its foot ...
2019Properties of Direct-Time and Reversed-Time Transfer Functions to Locate Disturbances along Power Transmission Lines
Mario Paolone, Zhaoyang Wang, Zhe Chen
The paper discusses specific frequency-domain properties of the electromagnetic time reversal (EMTR) method applied to locate faults and, more in general, disturbances in power networks. Specifically, we investigate the properties of two transfer functions ...
IEEE2019Pulse Reflectometer and Doppler back-scattering diagnostics in the TCV Tokamak
Stefano Coda, Laurie Porte, Pedro Andres Molina Cabrera
Latest DBS and Pulse reflectometer developments in the TCV tokamak are presented ...
2018