Induced Current Characteristics Due to Laser Induced Plasma and Its Application to Laser Processing Monitoring

Journal Article · Wed Mar 30 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3573682· OSTI ID:21511554

Madjid, Syahrun Nur; Idris, Nasrullah ^[1]; Kurniawan, Koo Hendrik ^[2]; Kagawa, Kiichiro ^[3]

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1. Department of Physics, Faculty of Mathematics and Natural Sciences, Syiah Kuala University, Banda Aceh (Indonesia)
2. Research Center of Maju Makmur Mandiri Foundation, 40/80 Srengseng Raya, Jakarta 11630 (Indonesia)
3. Department of Physics, Faculty of Education and Regional Studies, University of Fukui, 9-1 Bunkyo 3-chome, Fukui 910-8507 (Japan)

In laser processing, suitable conditions for laser and gas play important role in ensuring a high quality of processing. To determine suitable conditions, we employed the electromagnetic phenomena associated with laser plasma generation. An electrode circuit was utilised to detect induced current due to the fast electrons propelled from the material during laser material processing. The characteristics of induced current were examined by changing parameters such as supplied voltage, laser pulse energy, number of laser shots, and type of ambient gas. These characteristics were compared with the optical emission characteristics. It was shown that the induced current technique proposed in this study is much more sensitive than the optical method in monitoring laser processing, that is to determine the precise focusing condition, and to accurately determine the moment of completion of laser beam penetration. In this study it was also shown that the induced current technique induced by CW CO{sub 2} laser can be applied in industrial material processing for monitoring the penetration completion in a stainless steel plate drilling process.

• OSTI ID: 21511554
• Journal Information: AIP Conference Proceedings, Vol. 1328, Issue 1; Conference: PERFIK-2010: Malaysia annual physics conference 2010, Damai Laut (Malaysia), 27-30 Oct 2010; Other Information: DOI: 10.1063/1.3573682; (c) 2011 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABLATION
BEAMS
CARBON DIOXIDE LASERS
ELECTRIC POTENTIAL
ELECTRODES
ELECTRONS
EMISSION
LASER MATERIALS
LASER RADIATION
MONITORING
PLASMA
PLATES
PROCESSING
PULSES
STAINLESS STEELS
ALLOYS
CARBON ADDITIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
GAS LASERS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
LASERS
LEPTONS
MATERIALS
RADIATIONS
STEELS
TRANSITION ELEMENT ALLOYS