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The extensive use of SAES Getters NEG-based pumping systems for particle accelerators and other large vacuum systems was pioneered by CERN at the time of the design phase of the Large Electron Positron (LEP) collider. The need to provide UHV conditions along the low-conductance accelerator vacuum chamber in order to guarantee the required beam lifetime has prompted the widespread use of Non-Evaporable Getter strip. Mounted in a side chamber along the main beam chamber, the NEG strip runs along the entire circumference of the storage ring providing vacuum conditions in the range of 10-12 Torr.
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Since that pioneering and most successful application, SAES NEG pumps have provided the best working solution for those machines that require the highest vacuum levels, such as Storage Rings, both for particle physics experiments and for the production of Synchrotron radiation and low energy heavy ion rings, as well as for related equipment such as front ends, beam lines, insertion-device vacuum chambers, electron sources, and systems requiring high differential pumping such as electron-cooling and gas-jet targets.
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In all these machines SAES Getters NEGs have been used extensively either in their original configuration of strips or in more sophisticated configurations such as the Getter pumps both of the Cartridge Pumps and of the CapaciTorr families.
Recently, the use of NEGs in particle accelerators has reached a further level of sophistication with the development of the IntegraTorr. A coating technique is used to deposit NEG film directly onto the surface of accelerator vacuum chambers, changing the chamber walls from a gas source to a gas trap.
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The use of NEG pumping devices in particle accelerators has also prompted their use in other large-size experimental physics machines such as Nuclear Fusion equipment (Tokamak). In this application SAES NEG pumps, primarily in the form of Getter Wafer Modules and Panels, have been used mainly for their high efficiency to pump hydrogen and hydrogen isotopes.
NEGs are used either directly inside the main vacuum chamber or, more often, in conjunction with ancillary equipment such as divertors or pumped limiters, or in some kinds of diagnostic devices.
SAES Getters NEG-based pumping devices have also been proposed as a candidate for Gravitational Wave Detectors. |
Boost your product performance with SAES Getters solutions:
- CapaciTorr Pumps
- SORB-AC Cartridge Pumps
- SORB-AC Getter Wafer Module
- IntegraTorr - NEG Coating
- St707 Strip
Browse the Product Box for further details.
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