Reference code: 50061323_2 - 2021/WP 3
Commencement date: as soon as possible
Application deadline: June 7th, 2021
The place of employment is Hamburg.
The Helmholtz-Zentrum Hereon operates an outstation at the Deutsches Elektronen-Synchrotron (DESY) in Hamburg in order to provide access to highly brilliant synchrotron radiation within its German Engineering Materials Science Center (GEMS). At the PETRA III synchrotron radiation source, Hereon jointly operates the High Energy Materials Science Beamline (HEMS, P07), the Imaging Beamline (IBL, P05) and the Nanofocus end station of the Micro- and Nanofocus X-ray Scattering Beamline (MINAXS, P03) along with supporting laboratory instrumentation.
The tomography end stations at IBL and HEMS regularly produce large amounts of challenging 3D and 4D imaging data. For soft tissues or to enhance the intensity signal when the attenuation contrast is low, propagation-based or grating interferometric phase contrast imaging techniques are employed. In situ/operando/vivo experiments further impose severe constraints on scan times and X-ray dose. In order to enhance image quality, reduce artefacts, accelerate data acquisition and extend the employed techniques beyond current limitations, advanced methods for tomographic reconstruction and phase retrieval will be implemented including algebraic, iterative, functional or learning-based approaches. Furthermore, we explore combined approaches for multi-task processing and strategies for the optimization of acquisition, processing and analysis of image data.
The advancement of equality at the Helmholtz-Zentrum Hereon goes without saying; in particular, we are striving to increase the percentage of women in the science sector.
Your tasks
• implementation of advanced reconstruction methods for tomographic reconstruction and phase retrieval
• mutual optimization of acquisition, processing and analysis of image data
• implementation of deep-learning approaches for tomographic reconstruction and phase retrieval
• development of combined approaches for tomographic reconstruction and phase retrieval
• implementation of image processing tasks (artefact reduction, denoising, movement correction, segmentation, etc.)
• application of developed algorithms to tomography user data
• support of users during tomography experiments (beamtimes) at our PETRA III beamlines
• close collaboration with colleagues and beamline staff
• publish and present scientific results at international conferences and workshops
Your profile
These qualifications are essential to fulfil the above-mentioned duties:
• PhD in physics, mathematics, computer science or equivalent
• working experience in X-ray tomography
• expertise in tomography, phase contrast imaging and image processing
• knowledge in the areas of deep learning
• proficient in a relevant programming language (python, Matlab, C/C++, CUDA, etc.)
• experience with data analysis and handling of large data sets
• team player with good communication skills
• ability to work in an interdisciplinary and international team
• excellent skills in oral and written English
These qualifications are considered assets:
• experience in software development
• experience in high performance, parallel and distributed computing
• experience with image enhancement, image segmentation, or image registration
• experience with working at a synchrotron beamline
• experience with simulation frameworks
• good communication skills in German
The position is initially limited to 3 years and may be extended. Informal enquiries can be directed to Dr. Julian Moosmann,
[email protected].
We offer you
• multinational work environment with over 1,100 colleagues from more than 50 nations
• extensive options of vocational training (i. a. expert seminars, language courses or leadership seminars)
• flexible working hours and various models to ensure the compatibility of family and career
• excellent infrastructure, including a scientific in-house library as well as modern work spaces
• remuneration according to the standards of the collective wage agreement TV-AVH including further social benefits
• Employee Assistance Program (EAP)
• Welcome office, guesthouses
The promotion of equal rights is a matter of course for us. Severely disabled persons and those equaling severely disabled persons who are equally suitable for the position will be considered preferentially within the framework of legal requirements.
Interested?
Then we are looking forward to receiving your comprehensive application documents indicating the reference number 2021/WP 3 including cover letter (short, concise, max. 1 page), CV, list of publications, letter of recommendation, copies/transcripts of certificates including grades, and (link to) pdf file of your dissertation. The application must not exceed 10 MB.
