MEDSI2025 - 13th International Conference on Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation

Compact differential pumping system for windowless in-air sample environments beamline

FRO06

19 Sept 2025, 11:40

20m

The Loop

Contributed Oral Presentation Vacuum Core Technology Developments

Speaker

Cristian Maccarrone (European Synchrotron Radiation Facility)

Description

In this contribution we present a compact differential pumping chamber with apertures ≥ 500 μm. It allows windowless operation for in-air sample environments as well as to connect low-quality in-vacuum sample environments to the beamline UHV vacuum section. To simplify the design, it was decided not to integrate a positioning system and to rely on machining tolerances. In the end, the assembly consists of just 7 parts: 1 main aluminium body, 3 threaded cylinders with apertures and 3 covers with link to pumping units to be assembled with viton seals. The overall footprint is restricted to 368mm on the beam axis.