This paper presents a comparative analysis of permanent-magnet force-coupling topologies for actuating a load through the wall of an ultra-high vacuum vessel. Active magnetic system generating flux with coils is avoided due to the extremely harsh environment of the target application. Classical geometries with tubular magnetic system are limiting integration into complex mechanisms. We present a planar solution that satisfies delivered force and high integration for a scientific instrument in particle accelerators. The topologies are benchmarked using finite-element analysis; the most promising candidate is then optimized and prototyped for a specific application.
