Influence of focal point properties on energy transfer and plasma evolution during laser ignition process with a passively q-switched laser

Title data

Bärwinkel, Mark ; Lorenz, Sebastian ; Stäglich, Robert ; Brüggemann, Dieter:
Influence of focal point properties on energy transfer and plasma evolution during laser ignition process with a passively q-switched laser.
In: Optics Express. Vol. 24 (11 July 2016) Issue 14 . - pp. 15189-15203.
ISSN 1094-4087
DOI der Verlagsversion: https://doi.org/10.1364/OE.24.015189

	Format: PDF Name: oe-24-14-15189.pdf Version: Published Version Available under License Creative Commons BY 4.0: Attribution
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Project information

Project title:	Project's official title Project's id Impulskettenzündung mit passiv gütegeschalteten Laserzündkerzen unter motorischen Bedingungen BR 1713/13-1 Open Access Publizieren No information
Project financing:	Deutsche Forschungsgemeinschaft

Abstract

Miniaturized passively q-switched laser ignition systems are a promising alternative to conventional ignition sources to ensure a reliable ignition under difficult conditions. In this study the influences of focal point properties on energy transfer from laser to plasma as well as plasma formation and propagation are investigated as the first steps of the laser induced ignition process. Maximum fluence and fluence volume are introduced to characterize focal point properties for varying laser pulse energies and focusing configurations. The results show that the transferred laser energy increases with increasing maximum fluence. During laser emission plasma propagates along the beam path of the focused laser beam. Rising maximum fluence results in increased plasma volume, but expansion saturates when fluence volume reaches its maximum.

Further data

Item Type:	Article in a journal
Keywords:	Laser ignition; Lasers and laser optics; Lasers, diode-pumped;Lasers, Q-switched; Laser-induced breakdown; Plasmas
DDC Subjects:	500 Science > 530 Physics 600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University:	Faculties > Faculty of Engineering Science > Chair Engineering Thermodynamics and Transport Processes Faculties > Faculty of Engineering Science > Chair Engineering Thermodynamics and Transport Processes > Chair Engineering Thermodynamics and Transport Processes - Univ.-Prof. Dr.-Ing. Dieter Brüggemann Research Institutions > Research Units > BERC - Bayreuth Engine Research Center Faculties Faculties > Faculty of Engineering Science Research Institutions Research Institutions > Research Units
Language:	English
Originates at UBT:	Yes
Date Deposited:	29 Jun 2016 07:16
Last Modified:	22 Jun 2020 07:44
URI:	https://epub.uni-bayreuth.de/id/eprint/3620

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