X-ray emission as a potential hazard during ultrashort pulse laser material processing
- Ultrashort laser pulse micromachining features a high precision. By increasing the repetition rate of the applied laser to several 100 kHz, laser processing becomes quick and cost-effective and make this method attractive for industrial applications. Upon exceeding a critical laser intensity, hard X-ray radiation is generated as a side effect. Even if the emitted X-ray dose per pulse is low, the accumulated X-ray dose becomes significant for high-repetition-rate laser systems so that radiation safety must be considered. The X-ray emission during ultrashort laser processing was investigated for an intensity range up to 2.6*10^14 W/cm2. The investigations were performed with a laser emitting pulses with 925 fs pulse duration, at 1030 nm wavelength and 400 kHz repetition rate. Steel, tungsten, and glass were studied in ambient air. Corresponding X-ray spectra and X-ray dose measurements were presented. Suitable radiation protection strategies were shown.
Autor*innen: | Herbert LegallORCiD |
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Koautor*innen: | Christoph Schwanke, Simone Pentzien, G. Dittmar, Jörn BonseORCiD, Jörg KrügerORCiD |
Dokumenttyp: | Vortrag |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2018 |
Organisationseinheit der BAM: | 6 Materialchemie |
6 Materialchemie / 6.2 Material- und Oberflächentechnologien | |
DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten |
Freie Schlagwörter: | Femtosecond laser; Laser-induced X-ray emission; Radiation protection; Ultrashort laser material interaction |
Themenfelder/Aktivitätsfelder der BAM: | Material |
Veranstaltung: | European Materials Research Society (EMRS) Spring Meeting 2018, Symposium X “Photon-assisted synthesis and processing of materials in nano-microscale” |
Veranstaltungsort: | Strasbourg, France |
Beginndatum der Veranstaltung: | 18.06.2018 |
Enddatum der Veranstaltung: | 22.06.2018 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 05.07.2018 |
Referierte Publikation: | Nein |
Eingeladener Vortrag: | Nein |