Glow discharge detectors (GDDS) for millimeter-wave radiation detection and imaging

Date

2018

Author

Alasgarzade, Namig

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Commercially available indicator lamps, also known as Glow Discharge Detectors (GDDs), are employed for the purpose of millimeter wave radiation detection and imaging. Previous studies show that dominant radiation detection mechanism for GDDs is enhanced cascade ionization. The current-voltage characteristics of GDDs are obtained and working mode is found as abnormal glow mode. The plasma parameters such as electron temperature and gas composition inside GDDs are studied using Optical Emission Spectroscopy method. In order to employ a GDD as a pixel detector, a read-out electronics with an amplifier circuit is developed. This circuit is used to measure the changes in current of the plasma discharge. The detection performance of two different GDDs, namely N520A and N523, are tested at 82 GHz and 100 GHz radiation frequencies. The response of GDDs is found highly sensitive to the discharge current and polarization of the incident millimeter wave radiation. A continuous-wave imaging system is constructed using the GDD as a detector. The images are obtained at 82 GHz, 100 GHz and 119 GHz radiation frequencies.

Subject Keywords

Glow discharges., Millimeter waves., Radiation., Optical spectroscopy., Nonlinear optical spectroscopy

URI

http://etd.lib.metu.edu.tr/upload/12621863/index.pdf
https://hdl.handle.net/11511/27143

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

N. Alasgarzade, “Glow discharge detectors (GDDS) for millimeter-wave radiation detection and imaging,” M.S. - Master of Science, Middle East Technical University, 2018.