The ESS Mandate

Today, there are several research facilities based on neutron sources in Europe, which raises the question, "So why do we need another neutron facility?" Most existing sources are based on nuclear reactors, an approach that has reached its maximum capability and cannot be developed further. It is time for a new approach to neutron science.
ABOVE: Single-pulse source brightness as a function of time at a wavelength of 1.5 A at ESS, ILL, SNS, J-PARC and ISIS target stations 1 and 2. In each case, the thermal moderator with the highest peak brightness is shown. IMAGE: ESS
Neutrons are excellent for probing materials on the molecular level—everything from motors and medicine, to plastics and proteins. Detailed studies are dependent on how many neutrons can be produced by a neutron source. This is a significant limitation for existing sources based on nuclear reactors. As a result, scientists and engineers have developed a new generation of neutron sources based on particle accelerators and spallation technology, a much more efficient approach. ESS will provide up to 100 times brighter neutron beams than existing facilities today. The difference between the current neutron sources and ESS is something like the difference between taking a picture in the glow of a candle, or doing it under flash lighting.
ESS Vision, Mission and Core Values statement. Click to enlarge.
Read more about the unique strengths of ESS.
Europe today has more than 5,000 researchers using neutrons. The limitations of reactor technology have long been know, and it is the concensus among neutron scientists that increased spallation capacity is a necessary step forward. With an improved source there is also the need for ESS to develop increasingly sophisticated instruments and detectors.
Better sources and better instruments means exponentially more data to collect and analyze. That means the scientists doing research at ESS must be positioned to take full advantage of the last decade of exponential growth in data management capacity and computational power. As a Greenfield project, built from the ground up not only physically, but organizationally and philosophically, ESS is positioned as the vanguard of the next century of experimental science.