Pulse duration dependency of the X-ray emission during materials processing with ultrashort laser pulses

Holland, Julian; Weber, Rudolf; Sailer, Marc; Hagenlocher, Christian; Graf, Thomas

doi:10.1016/j.procir.2022.08.097

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…The laser irradiation incident on the workpiece defines how much ionizing radiation may be generated for the specific material, pulse length and wavelength, with the maximum achieved in the focal plane [1,2]. During laser turning (or tangential machining as it has also been referred to), the conditions change during feed-in and with reduced diameter so that the real irradiation is typically lower compared to the theoretical maximum value in the focal plane for normal incidence.…”

Section: Comparison Of Laser Turning With Normal Incidence Machining ...mentioning

confidence: 99%

X‐ray emissions during laser machining of cylindrical micro‐components

Giedl‐Wagner

Lang²

2023

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Ultrashort pulse lasers are the perfect tool for the micromachining of components for a wide range of applications. Even hard and brittle materials can be processed with high precision in state‐of‐the‐art machines like the GL.smart from GFH. With pulse lengths in the pico and femtosecond range, an irradiation >1012 W/cm2 is incident on the workpiece with the potential to generate ionizing radiation. This article deals with the x‐ray emissions recorded during laser turning operations and the corresponding safety measures.

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Section: Comparison Of Laser Turning With Normal Incidence Machining ...mentioning

confidence: 99%

X‐ray emissions during laser machining of cylindrical micro‐components

Giedl‐Wagner

Lang²

2023

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“…It features high electron temperatures that depend on the laser intensity, the pulse duration, the target material and the specific processing conditions. Within the plasma, X-ray photons can be generated due to Bremsstrahlung and characteristic line emission [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

X-ray emission during the ablative processing of biological materials by ultrashort laser pulses

et al. 2023

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The ablative laser processing with ultrashort pulsed laser beams may cause secondary emission of hazardous X-rays. While the effect has recently been proven to be considered in working safety regulations when processing technical materials, such as metals, the X-ray emission rates during the ablative processing of biological tissue materials are widely unexplored yet. Therefore, biological materials like water, isotonic saline solution, pig eyes, and human teeth were ablated with ultrashort laser pulses of 1030 nm wavelength, 600 fs pulse duration and 5 kHz pulse repetition rate, aiming to mimic typical surgery situations. Simultaneously, in-situ X-ray dose rate measurements were performed at a short distance from the plasma to display potential X-ray emission. For all four studied biological materials, our measurements prove the secondary emission of laser-induced X-rays.

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