Page 39 - tech fest 2025 אשדוד חוברת תקצירים

Book of Abstracts | 2025 Characterization of Gas Expansion Ion Source Based on Static Discharge Voltage
EEE-A-07
Igal Dudchenko; Igaldu@ac.sce.ac.il Guy Azran; guyaz@ac.sce.ac.il
Advisor: Dr. Zeev Fredkin
SCE - Shamoon College of Engineering, Ashdod
Ion beams are essential in semiconductor fabrication, mass spectrometry, and molecular physics. This project tested a commercial ion source, using gas ionization via static high-voltage electrical discharge. Gas was injected into a vacuum chamber through a voltage-controlled piezo valve in short pulses (30– 50 μs), with the discharge initiated by the gas pulse between high-voltage electrodes. The setup included electrostatic lenses, deflectors, and a Wien filter for ion focusing and mass selection. Ion current was detected using a Faraday cup and measured with a digital oscilloscope. The piezo valve’s response time was about 7 μs (FWHM). Ion current was analyzed as a function of discharge voltage, piezo voltage, and source-detector potential difference. The results showed reliable ion production.
Keywords: gas expansion, gas ionization by high voltage, pulsed piezo-valve, Faraday cup
Frequency Stabilization in Electrical Grids Using Renewable Energy Sources and VSG Control
EEE-A-08
Lior Atal; lior7536@gmail.com Lior Bitan; lior5435@gmail.com
Advisor: Dr. Martin Mellincovsky
SCE - Shamoon College of Engineering, Ashdod
In remote areas of a power grid, frequency instability may arise, due to their physical distance from central infrastructure and the limitations of ring network topologies. This project addressed such instability by integrating a virtual synchronous generator (VSG) using droop control, in combination with an energy storage solution. Our approach aimed to support local frequency regulation during disturbances and enhance the reliability of power delivery. A dynamic simulation was conducted in MATLAB/Simulink to evaluate system response under various scenarios, both with and without energy storage. These simulations demonstrated the ability to maintain frequency stability and improv overall system robustness, enabling broader integration of renewable sources.
Keywords: droop method, energy storage, frequency stability, remote grids, VSG control
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