TY - JOUR

T1 - X-ray dose rate and spectral measurements during ultrafast laser machining using a calibrated (High-sensitivity) novel x-ray detector

AU - Mosel, Philip

AU - Sankar, Pranitha

AU - Düsing, Jan Friedrich

AU - Dittmar, Günter

AU - Püster, Thomas

AU - Jäschke, Peter

AU - Vahlbruch, Jan Willem

AU - Morgner, Uwe

AU - Kovacev, Milutin

N1 - Funding Information: Acknowledgments: The publication of this article was funded by the Open Access Fund of the Leibniz Universität Hannover. Funding: German Research Foundation under Germany’s Excellence Strategy within the Cluster of Excellence Quantum Frontiers EXC-2123 and Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453).

PY - 2021/8/5

Y1 - 2021/8/5

N2 - 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.

AB - 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.

KW - Dose rate

KW - Micromachining

KW - Ultrafast laser

KW - X-ray emission

KW - X-ray spectrum

UR - http://www.scopus.com/inward/record.url?scp=85112339384&partnerID=8YFLogxK

U2 - 10.3390/ma14164397

DO - 10.3390/ma14164397

M3 - Article

AN - SCOPUS:85112339384

VL - 14

JO - MATERIALS

JF - MATERIALS

SN - 1996-1944

IS - 16

M1 - 4397

ER -