PhD student position (all genders) in Accelerator Physics

Helmholtz Association of German Research Centres; Deutschland; Vor Ort; EUR 40.000 - 60.000; Teilzeit

Zusammenfassung

A leading research center in Germany is seeking a PhD student in Accelerator Physics. The role involves designing re-buncher cavities, working with RF systems, and participating in beam operation. Ideal candidates hold a Master's degree in physics, possess knowledge in RF technologies, and have good communication skills in English and German. This 65% part-time position offers competitive benefits and opportunities for professional development.

Leistungen

Mobile working

Company health management services

Supplementary pension benefits

Personal training opportunities

Qualifikationen

• Master's Degree in physics required.
• Interest in working with RF-systems and accelerator installations.
• Knowledge in rf-technics, accelerator physics, or computational physics.

Aufgaben

• Design and manufacture re-buncher cavities using additive manufacturing.
• Responsibility for RF design and simulation of the re-buncher cavity.
• Development of a dedicated test stand for high-power RF testing.

Kenntnisse

RF-systems knowledge

Team-oriented

Structured approach to work

Good English skills

Good German skills

Ausbildung

University Master Degree in physics

Tools

CST Studio

Python

Jobbeschreibung

Area of research:

Technik

Starting date:

17.11.2025

Job description:

The GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt operates one of the leading particle accelerators for science. Currently, the new FAIR (Facility for Antiproton and Ion Research) one of the world’s largest research projects, is under construction through international cooperation. GSI and FAIR offer the opportunity to work in this international environment with a team of employees committed to world‑class science.

In cooperation with the Johannes Gutenberg-Universität Mainz the LINAC department offers a PhD student position (all genders) in Accelerator Physics

Reference number: 25.139-6680

for a contract starting at the earliest possible date.

Our project / Your tasks

The position is embedded in the development program for the superconducting linear accelerator HELIAC (Helmholtz LInear ACcelerator).

HELIAC consists of a normal‑converting injector LINAC and a superconducting section comprising up to four cryogenic modules.

The candidate will work on the development of the Medium Energy Beam Transport (MEBT) line. In particular, normal‑converting radio frequency (rf) re‑buncher cavities must be designed and manufactured using additive manufacturing technologies, and subsequently tested with high RF power and ion beam.

The successful candidate will be responsible for:

• The beam dynamics design of the re‑buncher cavity
• The RF design and simulation of the re‑buncher cavity using CST Studio
• The thermal and mechanical design of the cavity, taking into account compatibility with additive manufacturing methods
• The development of a dedicated test stand for high‑power RF testing of the normal‑converting cavities.

Other tasks include:

• Participation in operation of first cryogenic module of HELIAC
• Participation in beam times
• Operation of cryogenic infrastructure.

Your qualifications and skills

• University Master Degree in physics
• Ability and interest to work with RF‑systems and accelerator installations
• Knowledge in one or more of these fields: rf‑technics, accelerator physics, computational physics
• Team‑oriented, a structured approach to work and safe working methods
• Good language skills in English and German.

The following qualifications and skills are desirable

• Experience in Python programming
• Experience with analog and digital electronics

You may expect

a multifaceted and interesting position within an internationally leading research institution. Teamwork and the willingness to undergo further training are essential for us. GSI also offers various options for balancing family and career, mobile working, company health management services, company social counselling services, personal training and qualification opportunities, a job ticket, supplementary pension benefits, additional company leisure time and a company sports club ‘Schnelle Ionen’.

The position (65% part‑time) is limited until 31.08.2028. Salary is as specified in the collective agreement for public employees (TVöD Bund), effective at GSI.

GSI promotes the professional development of women and expressly welcomes applications from women. Handicapped persons will be preferentially considered when equally qualified.

Further information about FAIR and GSI is available at www.gsi.de and www.fair-center.eu.

If you find this position interesting and challenging and would like to work in an exceptional, international, strongly technical environment, please send your full application documents with information of your earliest possible starting date and the reference number 25.139-6680 above by 01.12.2025 at the latest via the online portal on our job site.

Online‑Bewerbungsportal

GSI Helmholtzzentrum für Schwerionenforschung GmbH

Human Resources Department

Planckstrasse 1

64291 Darmstadt

GERMANY

This research center is part of the Helmholtz Association of German Research Centers. With more than 42,000 employees and an annual budget of over € 5 billion, the Helmholtz Association is Germany's largest scientific organisation.