X-ray dose rate and spectral measurements during ultrafast laser machining using a calibrated (High-sensitivity) novel x-ray detector

authored by: Philip Mosel, Pranitha Sankar, Jan Friedrich Düsing, Günter Dittmar, Thomas Püster, Peter Jäschke, Jan Willem Vahlbruch, Uwe Morgner, Milutin Kovacev
Abstract: Ultrashort pulse laser machining is subject to increase the processing speeds by scaling average power and pulse repetition rate, accompanied with higher dose rates of X-ray emission generated during laser–matter interaction. In particular, the X-ray energy range below 10 keV is rarely studied in a quantitative approach. We present measurements with a novel calibrated X-ray detector in the detection range of 2–20 keV and show the dependence of X-ray radiation dose rates and the spectral emissions for different laser parameters from frequently used metals, alloys, and ceramics for ultrafast laser machining. Our investigations include the dose rate dependence on various laser parameters available in ultrafast laser laboratories as well as on industrial laser systems. The measured X-ray dose rates for high repetition rate lasers with different materials definitely exceed the legal limitations in the absence of radiation shielding.
Organisation(s): Institute of Quantum Optics
Centre for Radiation Protection and Radioecology
QuantumFrontiers
External Organisation(s): Laser Zentrum Hannover e.V. (LZH)
Steinbeis Transfer Center Technology Consultancy and Development
Type: Article
Journal: MATERIALS
Volume: 14
ISSN: 1996-1944
Publication date: 05.08.2021
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Materials Science(all), Condensed Matter Physics
Electronic version(s): https://doi.org/10.3390/ma14164397 (Access: Open)

BibTeX

@article{2f8f24fdf058409294fae052e416f72a,
title = "X-ray dose rate and spectral measurements during ultrafast laser machining using a calibrated (High-sensitivity) novel x-ray detector",
abstract = "Ultrashort pulse laser machining is subject to increase the processing speeds by scaling average power and pulse repetition rate, accompanied with higher dose rates of X-ray emission generated during laser–matter interaction. In particular, the X-ray energy range below 10 keV is rarely studied in a quantitative approach. We present measurements with a novel calibrated X-ray detector in the detection range of 2–20 keV and show the dependence of X-ray radiation dose rates and the spectral emissions for different laser parameters from frequently used metals, alloys, and ceramics for ultrafast laser machining. Our investigations include the dose rate dependence on various laser parameters available in ultrafast laser laboratories as well as on industrial laser systems. The measured X-ray dose rates for high repetition rate lasers with different materials definitely exceed the legal limitations in the absence of radiation shielding.",
keywords = "Dose rate, Micromachining, Ultrafast laser, X-ray emission, X-ray spectrum",
author = "Philip Mosel and Pranitha Sankar and D{\"u}sing, {Jan Friedrich} and G{\"u}nter Dittmar and Thomas P{\"u}ster and Peter J{\"a}schke and Vahlbruch, {Jan Willem} and Uwe Morgner and Milutin Kovacev",
note = "Funding Information: Acknowledgments: The publication of this article was funded by the Open Access Fund of the Leibniz Universit{\"a}t Hannover. Funding: German Research Foundation under Germany{\textquoteright}s Excellence Strategy within the Cluster of Excellence Quantum Frontiers EXC-2123 and Germany{\textquoteright}s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453).",
year = "2021",
month = aug,
day = "5",
doi = "10.3390/ma14164397",
language = "English",
volume = "14",
journal = "MATERIALS",
issn = "1996-1944",
publisher = "MDPI AG",
number = "16",
}