Trainee for a load-lock system for the travelling-wave RF photogun
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The Paul Scherrer Institute PSI is the largest research institute for natural and engineering sciences within Switzerland. We perform cutting‑edge research in the fields of future technologies, energy and climate, health innovation and fundamentals of nature. By performing fundamental and applied research, we work on sustainable solutions for major challenges facing society, science and economy. PSI is committed to the training of future generations. Therefore, about one quarter of our staff are post‑docs, post‑graduates or apprentices. Altogether, PSI employs 2,300 people.
For the PSI Center for Accelerator Science and Engineering we are looking for a trainee to develop a load‑lock system for the travelling‑wave RF photogun.
Date: 21.11.2025
Tasks
The travelling‑wave TW RF photogun has demonstrated excellent performance during high‑power testing. However, in the current design, there are areas to improve in the RF fingers and cathode alignment. The current system limits operational flexibility when operating with semiconductor photocathodes and also lacks reproducibility of the cathode alignment, which requires ~100 µm precision.
This project aims to develop an improved photocathode load‑lock system incorporating a new spring‑based design alignment system to enhance reproducibility and allow use of semiconductor cathode materials. The project is divided into two parts:
* Core Task: Develop a mechanical concept and simulation/model for the new load‑lock system.
* Advanced Task (for experienced students): Produce a system prototype and/or test concepts.
This work is vital to the further development of the feasibility of the TW photogun for use in SwissFEL where semiconductor photocathodes must be exchanged under vacuum.
Profile
* You are a student in mechanical engineering or a related field, and you are at least in your ultimate year of undergraduate study (minimum 4 semesters).
* Interest in vacuum, high‑power electronics or RF systems is advantageous.
* You have not yet completed your Master’s thesis.
Offer
The contract will be limited to 3 months.
Contact
For further information, please contact Reto Fortunati, phone +41 56 310 23 05, or Dr Thomas Lucas, phone +41 56 310 50 81.
Please submit your application online for the position as a trainee (index no. 8415-25721).
Paul Scherrer Institute, Human Resources Management, Lara Essig, 5232 Villigen PSI, Switzerland
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