2025
03/06
OPEN
Date
2025/03/06（Thu.）11:00 – 12:00
Venue
PF Research Build. 2nd floor conf. room + Zoom
Speaker
Dr. Oleg B. Malyshev (ASTeC, STFC Daresbury Laboratory)
Language
English
URL
Contact
Y. Tanimoto (PHS 4713)
Overview
Non-evaporable getter (NEG) coating is widely used in modern particle accelerators: colliders (ex.: LHC), Light sources (ESRF, ELETTRA, MAX-IV, Soleil, DLS, etc.), heavy ion machines (ex.: GSI), and many others. In designs of future machines, NEG coating is considered as possible or even as the only solution for meeting challenging vacuum specifications.
Such successful application is a good motivation for further ongoing development of NEG coating to address the following:
• NEG composition: use of transitional metals (Ti, Zr, Hf, V, Nb) in various combinations;
• NEG morphology: dense vs columnar;
• NEG structure: singe, dual and triple layer;
• Collecting experimental data: pumping properties, ESD, PSD, SEY and PEY;
• Data analysis, gas dynamics modelling, data application to a future machine design.
• NEG activation procedure vs multiple activations and long term performance
(pumping properties, ESD, PSD, SEY and PEY);
• NEG coating impact on beam energy spread (RF surface resistance) and new solutions.
The talk will overview the achieved results, lessons and directions of future developments.