What question did this study set out to answer?

The aim is to understand gas desorption behavior in novel materials for accelerator applications.

February 2, 2026JACOW0 citationsOpen Access

Photon stimulated desorption beamline at NSLS-II

RTR. ToddUniversité Paris-Sud CHCharles Hetzel MFMarcelo Juni Ferreira

Key Points

The aim is to understand gas desorption behavior in novel materials for accelerator applications.
Construction and commissioning of a dedicated beamline at NSLS-II.
Measurement of desorption rates for materials such as stainless steel and coated copper.
Integration of measured rates into advanced modeling tools for vacuum predictions.
Established desorption rates for various materials were documented.
Future plans for the beamline were discussed, highlighting its role in accelerator upgrades.
Data will enhance the understanding of vacuum behavior, improving design efficiency.

Abstract

Understanding synchrotron induced gas desorption plays an important role in predicting vacuum behavior of accelerators. Investigations of new materials and coatings require careful study of their desorption yield for potential use in upgrading NSLS-II as well as other accelerator facilities. A beamline at NSLS-II, dedicated to the study of novel and proposed vacuum materials has been constructed and commissioned to advance further research into desorption behavior. The PSD of stainless steel, OFHC copper and NEG coated copper, some of which for use in the future Electron-Ion Collider at BNL, have been measured and will be presented. These newly established desorption rates will be used as inputs to advanced modeling tools such as MolFlow+ and SynRad+ for accurate predictions of vacuum behavior and design optimization. The existing layout and future plans for the beamline will be presented.

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