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Archiv-Übersicht     Angebot Nr. 14899

Angebotsdatum: 28. Juni 2023
Art der Stelle: Doktorarbeit / Diplomarbeit
Fachgebiet: Physik > Sonstiges
Titel des Themas: Doctoral Project Opportunity – Lattice Damage by Hydrogen at Sub-Threshold Ion Energies

Institut: Forschungszentrum Jülich GmbH
Frau Michalski
52428 Jülich bei Köln
Tel.:    Fax.:
Bundesland: Nordrhein-Westfalen
Homepage: https://www.fz-juelich.de/de/karriere/stellenangebote/2023D-058?apply
E-Mail Kontakt: mail

Beschreibung: Conducting research for a changing society: This is what drives us at Forschungs­zentrum Jülich. As a member of the Helm­holtz Asso­ciation, we aim to tackle the grand societal challenges of our time and conduct research into the possi­bilities of a digitized society, a climate-friendly energy system, and a resource-efficient economy. Work together with around 7,250 employees in one of Europe’s biggest research centres and help us to shape change!

Would you like to work on an interdisciplinary doctoral project for four years bridging different research topics and disciplines while benefiting from the expertise and supervision of experienced scientists from different institutes at Forschungszentrum Jülich? Then a project within the Jülich Program for Collaborative Doctoral Projects is just right for you. Research at Forschungszentrum Jülich addresses the very latest issues that impact our society, combining basic research with application. Being one of Europe’s biggest and most multidisciplinary research centers with a strong research infrastructure, Forschungszentrum Jülich offers unique opportunities for interdisciplinary projects. Support us researching and developing new ideas and solutions for a changing society. For more information on the Jülich Program for Collaborative Doctoral Projects, please visit: https://go.fzj.de/collaborative-doctoral-projects.

We are offering a four year

Doctoral Project Opportunity – Lattice Damage by Hydrogen at Sub-Threshold Ion Energies
Your Job:
Hydrogen (H), the most prospective carbon-neutral energy carrier, is a ubiquitous impurity in crystalline solids exhibiting many unique properties upon interactions with lattice atoms and/or crystal defects. One such unique property is the unexpected formation of lattice damage and in turn H-supersaturated surface layers (HSSL) in metals exposed to H plasma / ion irradiation with sub-threshold ion energies. Sophisticated experimental design and advanced techniques are available to “see” H retained at defect microstructures in the nanometer-thick HSSL and to further explore its formation mechanism, microstructure evolution process, including but not limited to transmission electron microscopy (TEM), nuclear reaction analysis (NRA), and atom probe tomography (APT). The project will be jointly supervised by experts from the Institute of Energy and Climate Research (IEK-4: Plasma Physics) and the Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons (ER-C-2: Materials Science and Technology).
We are looking for a doctoral researcher who will:

Perform TEM characterization of defects microstructure in HSSL on plasma-exposed tungsten (W)
Measure and compare H distribution in HSSL on W using NRA and APT
Track the defects microstructure evolution in HSSL upon in situ annealing in TEM
Explore the formation mechanism of HSSL by H ions at sub-threshold energies
Extrapolate the mechanism from W to other metals with potential of catalytical application
Specific tasks you may come across are:

Tungsten (W) samples preparation with different dimensions for different techniques (needle-like samples for APT, ⌀ 3 mm discs for TEM, bulk samples for NRA)
Low-energy plasma exposure of W samples for HSSL at different exposure conditions (H particle fluences, temperature, etc.)
Detailed TEM characterization of HSSL formed at different plasma exposure conditions
In situ TEM characterization of HSSL microstructure evolution upon post-exposure annealing at different temperatures
APT characterization of the three-dimensional H distribution in the HSSL on W
NRA measurements on H depth profile in the HSSL via established external collaboration
Physical model building-up to interpret the lattice damage formed by sub-threshold H ions
Extrapolation from W to other metals, including Fe, Ni, etc.
Further information about the institutes is available at https://www.fz-juelich.de/en/iek/iek-4 and https://www.fz-juelich.de/en/er-c/er-c-2.

Your Profile:
Physics or material science as the major for master study, strong background on crystal defects is highly preferred
Basic knowledge or operating experience on transmission / scanning electron microscopy
Fluent English: oral and scientific writing, German enhances the priority
Team-work spirit and an open mind in science
Acceptance of business trips due to international conference participation or external collaborations
Strong motivation for pursuing a doctoral degree within four years in an ambitious but rewarding interdisciplinary project related to H economy implementation towards carbon neutrality in the 21st century
Our Offer:
We offer ideal conditions for you to work on a doctoral project at the leading edge of science, including:

Excellent scientific and technical infrastructure
Continuous supervision by a team of experts
A vibrant international work environment on an attractive research campus, ideally situated between the cities of Cologne, Düsseldorf, and Aachen
Further development of your personal strengths, e.g. through an extensive range of training courses; a structured program of continuing education and networking opportunities specifically for doctoral researchers via JuDocS, the Jülich Center for Doctoral Researchers and Supervisors: https://www.fz-juelich.de/en/judocs
Extensive company health management, as well as social security and health insurance
30 days of annual leave and provision for days off between public holidays and weekends (e.g. between Christmas and New Year)
Targeted services for international employees, e.g. through our International Advisory Service
Place of employment: Jülich

In addition to exciting tasks and a collaborative working atmosphere at Jülich, we have a lot more to offer: https://go.fzj.de/benefits.

The PhD position is fixed for a term of four years. Pay will be in line with the Collective Agreement for the Public Service (TVöD-Bund).

We welcome applications from people with diverse backgrounds, e.g. in terms of age, gender, disability, sexual orientation / identity, and social, ethnic and religious origin. A diverse and inclusive working environment with equal opportunities, in which everyone can realize their potential, is important to us.

For this program it is mandatory to use and upload our CV template: https://go.fzj.de/collaborative-doctoral-projects.

We look forward to receiving your application by August 7, 2023, via our Online Recruitment System!

Questions about the Offer?
Please feel free to contact us via our contact form. Please note that for technical reasons we cannot accept applications via email.


Anfangsdatum: 8. August 2023
Geschätzte Dauer: 4 Jahre