MA Investigate the influence of multi-reflection in the borehole during UKP drilling

The Fraunhofer-Gesellschaft (www.fraunhofer.com) currently operates 76 institutes and research institutions throughout Germany and is the world’s leading applied research organization. Around 30 800 employees work with an annual research budget of 3.0 billion euros.

In cooperation with the Department Laser Technology LLT at RWTH Aachen University, the Fraunhofer Institute for Laser Technology ILT, Europe's leading centre for basic and contract research in the field of laser technology, is offering the opportunity to write a thesis in the field of "Laser Drilling" on the subject of "Drill Hole in USP Drilling Processes".

Laser beam drilling with ultrashort pulse lasers is a widely researched process that is used in many areas of industry. Hole geometries of several orders of magnitude and different shapes can be realised using various optical systems and process strategies. Nevertheless, one driving effect is not yet fully understood. The effect of multi-reflection of the laser light in the drill hole is known, but this effect has not yet been explained in detail.

In this work, you will eliminate the multi-reflection in the drill hole as far as possible by drilling exactly at the edge of a stainless steel foil. This means that only half of the hole will be drilled and all the radiation reflected and scattered in half the hole will be lost in the free half-space. The holes placed at the edge are then compared with holes drilled on solid material. The two cases are shown schematically in the figure above. For a meaningful comparison of the resulting drilling geometries, all other influencing factors are minimised as far as possible. This includes, above all, the thermal load, as the heat conduction is different in the two cases.

What you will do

Researching and recording the state of the art
Planning and carrying out tests
Documentation and discussion of the results

What you bring to the table

You are studying physics, engineering or a comparable degree programme
You are interested in practical work and machine operation
You work reliably and carefully for your own safety due to safety class 4

What you can expect

A professional and dynamic working atmosphere
A creative and interdisciplinary working environment in a highly motivated team
Excellent machinery and equipment
Exciting and challenging areas of work in applied research
Freedom to develop your own ideas, projects for your field of study
Flexible working hours that allow you to combine your studies and professional practice
Very good travel options (bus, car)
Exciting seminars, events and team-building measures

The position is limited to the end of the thesis.

We value and promote the diversity of our employees' skills and therefore welcome all applications - regardless of age, gender, nationality, ethnic and social origin, religion, ideology, disability, sexual orientation and identity. Severely disabled persons are given preference in the event of equal suitability.

With its focus on developing key technologies that are vital for the future and enabling the commercial utilization of this work by business and industry, Fraunhofer plays a central role in the innovation process. As a pioneer and catalyst for groundbreaking developments and scientific excellence, Fraunhofer helps shape society now and in the future.

Interested? Apply online now. We look forward to getting to know you!

If you have any questions about this position, please contact:

Philipp Bremer M. Sc.
Tel.: +49 241 8906-163

Fraunhofer Institute for Laser Technology ILT

www.ilt.fraunhofer.de

Requisition Number: 73151 Application Deadline: 06/14/2024

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