Development and characterized of microcontroller based xenon flashlamp driver circuit

Optical pumping using flashlamp is the preferred technique in solid state laser. Xenon flashlamp is a device that emits large amount of spectral energy in short duration pulses. Xenon is generally chosen because it yields a higher radiation output (40% -60%) for a given electrical energy than other...

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Main Author:	Alias, Asmawati@Fatin Najihah
Format:	Thesis
Language:	English
Published:	2005
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/4515/9/AsmawatiFatinNajihahMFS2005.pdf
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id	my-utm-ep.4515
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spelling	my-utm-ep.45152018-02-26T06:10:20Z Development and characterized of microcontroller based xenon flashlamp driver circuit 2005-12 Alias, Asmawati@Fatin Najihah QC Physics Optical pumping using flashlamp is the preferred technique in solid state laser. Xenon flashlamp is a device that emits large amount of spectral energy in short duration pulses. Xenon is generally chosen because it yields a higher radiation output (40% -60%) for a given electrical energy than other noble gases. Triggering a flashlamp generally requires very high voltage pulse of a short duration. The objective of this project is to develop a programmable xenon flashlamp driver. Current set-up allows flashlamp to be triggered in a single mode. A fundamental study was carried out by varying the input energy from 4.48 J to 26.88 J across the flashlamp. The heart of the flashlamp driver is a PIC16F84A microcontroller that runs on a +5 V supply and clocked by a 4 MHz resonator. This microcontroller was connected to a personal computer, via serial port, acting as remote terminal. Initially, a TTL pulse output from PIC16F84A was sent out to drive a SCR. The SCR step-upped the TTL pulse to 332 Â±5 volts pulse. Finally, a 1:2 transformer mixes the resulting 740 Â±10 volt pulse with 2 Â±0.01 kV DC voltage. The resulting voltage waveform is applied across a xenon flashlamp. Xenon gas ionizes for a brief period determined by the pulse width. This results in an electrical short circuit across the flashlampâ€™s electrodes. A large amount of current is drawn across the electrodes. This causes a rapid increase in the current flow through the flashlamp and initiates the desired arc lamp discharges. A Rogowski coil was used to detect the pulse current waveform. Xenon flashlamp output was detected using IPL10050 photodiode. An OPHIR BeamStar CCD Laser Beam Profiler was employed to record a plasma spectral gradient. The peak pulse current was obtained in the range of 776 A â€“ 982 A. The bandwidth and the amplitude of the xenon flashlamp pulse were found in good agreement with the input energy. The beam profiles and dimensions of the plasma were dependent upon input energy. 2005-12 Thesis http://eprints.utm.my/id/eprint/4515/ http://eprints.utm.my/id/eprint/4515/9/AsmawatiFatinNajihahMFS2005.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QC Physics
spellingShingle	QC Physics Alias, Asmawati@Fatin Najihah Development and characterized of microcontroller based xenon flashlamp driver circuit
description	Optical pumping using flashlamp is the preferred technique in solid state laser. Xenon flashlamp is a device that emits large amount of spectral energy in short duration pulses. Xenon is generally chosen because it yields a higher radiation output (40% -60%) for a given electrical energy than other noble gases. Triggering a flashlamp generally requires very high voltage pulse of a short duration. The objective of this project is to develop a programmable xenon flashlamp driver. Current set-up allows flashlamp to be triggered in a single mode. A fundamental study was carried out by varying the input energy from 4.48 J to 26.88 J across the flashlamp. The heart of the flashlamp driver is a PIC16F84A microcontroller that runs on a +5 V supply and clocked by a 4 MHz resonator. This microcontroller was connected to a personal computer, via serial port, acting as remote terminal. Initially, a TTL pulse output from PIC16F84A was sent out to drive a SCR. The SCR step-upped the TTL pulse to 332 Â±5 volts pulse. Finally, a 1:2 transformer mixes the resulting 740 Â±10 volt pulse with 2 Â±0.01 kV DC voltage. The resulting voltage waveform is applied across a xenon flashlamp. Xenon gas ionizes for a brief period determined by the pulse width. This results in an electrical short circuit across the flashlampâ€™s electrodes. A large amount of current is drawn across the electrodes. This causes a rapid increase in the current flow through the flashlamp and initiates the desired arc lamp discharges. A Rogowski coil was used to detect the pulse current waveform. Xenon flashlamp output was detected using IPL10050 photodiode. An OPHIR BeamStar CCD Laser Beam Profiler was employed to record a plasma spectral gradient. The peak pulse current was obtained in the range of 776 A â€“ 982 A. The bandwidth and the amplitude of the xenon flashlamp pulse were found in good agreement with the input energy. The beam profiles and dimensions of the plasma were dependent upon input energy.
format	Thesis
qualification_level	Master's degree
author	Alias, Asmawati@Fatin Najihah
author_facet	Alias, Asmawati@Fatin Najihah
author_sort	Alias, Asmawati@Fatin Najihah
title	Development and characterized of microcontroller based xenon flashlamp driver circuit
title_short	Development and characterized of microcontroller based xenon flashlamp driver circuit
title_full	Development and characterized of microcontroller based xenon flashlamp driver circuit
title_fullStr	Development and characterized of microcontroller based xenon flashlamp driver circuit
title_full_unstemmed	Development and characterized of microcontroller based xenon flashlamp driver circuit
title_sort	development and characterized of microcontroller based xenon flashlamp driver circuit
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2005
url	http://eprints.utm.my/id/eprint/4515/9/AsmawatiFatinNajihahMFS2005.pdf
_version_	1747814532889182208

Development and characterized of microcontroller based xenon flashlamp driver circuit

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