ESS Shutter Switches

The mandate of the European Spallation Source ERIC is to design, plan, construct, commission, operate and decommission the European Spallation Source (ESS).

It is located in Lund, Sweden, co-hosted by Sweden and Denmark and has more than 22 Partner Countries, including the UK. The UK contribution is coordinated by STFC. The facility will deliver its first neutrons in 2019 and is expected to be fully operational by 2025.

The European Spallation Source (ESS) will be one of the largest infrastructures in Europe and will be used for neutron production for materials research. It will use a long pulsed superconducting linac and accelerate a 62.5 mA proton beam current to the energy of 2000 MeV. Peak beam power to the target will be 125 MW, 7 times more than the highest power existing facility.

STFC are providing a number of goods and services on behalf of the ESS. This tender is for the procurement of shutter switches for the RF distribution system (RFDS) for the cold linac (for the Spoke and Medium Beta (MB) elliptical cavities).

All the components shall follow EIA standards, unless specified. Insulating materials shall be selfextinguishing and not release any toxic or corrosive products when subjected to fire.

All the components shall operate in pulsed mode with high reliability for at least 20 years and shall be able to withstand frequent stoppages without affecting performance and reliability.

The Shutter Switches and their flanges are to be made of aluminium alloy. Aluminium 6061-T6 alloy (ISO Al Mg Si Cu) or equivalent is recommended by ESS. The following alloys are acceptable: 6061-T6, 6082-T6, etc.

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