WP13: TA8 – Trans-national Access to European XFEL
Provision of access to the following infrastructure(s): European XFEL
Description of the infrastructure
The European X-Ray Free-Electron Laser Facility GmbH (European XFEL) is an X-ray Research Infrastructure facility currently under construction. A wide range of scientific fields are expected to be served by the instruments of the European XFEL, including structural biology, hard condensed matter, soft matter, chemistry (femtochemistry, dynamics of photochemical reactions, inorganic coordination chemistry, gas phase chemistry), atomic and molecular physics, cluster and nanoparticle physics, ultrafast laser physics, ultrafast dynamics in condensed matter, strongly correlated materials, femtomagnetism, non-linear matter interactions, relativistic laser-plasma physics, matter at extreme pressures and density, planetary science, study of warm / hot dense matter, atomic and solid-state physics within highly excited solids, materials in strong magnetic fields.
The facility will generate high-intensity electromagnetic radiation by accelerating electrons to relativistic speeds and directing them through special magnetic structures. Planned parameters are as follows: Electron energy: 17.5 GeV, Nominal beam current: 30 μA (max. current of linear accelerator), Energy Range of Emitted Radiation: 0.25–25 keV. The European XFEL accelerator will operate at -271°C using superconductive technology which allows the creation of an electron beam of especially high quality, composed of many electron bunches lined up behind each other. This high number of electron bunches will make it possible to generate more X-ray flashes than other hard X-ray free-electron lasers.
Start of the experimental program has been September, 1st 2017 and it is expected that full performance and regular user operation at all instruments starts in Jan 2019.
|Name of the infrastructure (and
its installations, if applicable)
|European X-Ray Fee-Electron Laser Facility GmbH (European XFEL)|
|Location of the infrastructure||Schenefeld, GERMANY|
|Services currently offered by the infrastructure||The user office coordinates the logistic and practical details of the user groups’ visits and ensure smooth communication with the users from planning, preparing, and conducting experiments to publishing their results. This is in addition to technical/engineering user support coordinated by a local contact scientist.
The visiting groups will have access to all infrastructures of European XFEL such as experimental equipment, computing facilities, laboratories, library services. There are plans to build a guesthouse and a canteen on the new campus in Schenefeld.
Modality of access & application procedure
|Modality of access||In order to request access to the facility, users will be able to submit proposals for experiments via a user portal linked to the European XFEL homepage.
Preparatory work for the actual measurements will be assessed before the allocation of the proposal and overall time allocated will depend on this, too. At present only standard proposals are under consideration, different allocation schemes may come up later. However, even priority beamtime proposals submitted by User Consortia will have to be reviewed about their scientific merit and checked for feasibility/safety issues, like for all other public users.
Calls for proposal:
|Offered support||The European XFEL is a user facility and access by external users, the conduct of successful experiments and the publication of scientific results arising from these experiments are the main goals of the organisation.
|Outreach to new users||
|Review procedure||Proposals will be reviewd by review panels and first review panels. Their composition will reflect the expected representation of scientific fields/techniques on each single instrument (i.e. all proposals addressed to an instrument will be reviewed within the same committee). Ad hoc reviewers may also be involved in case a committee misses a specific expertise. This will enable ensurance of a straightforward transition from the outcome of the review about the scientific merit of the proposal to the actual allocation.
From the early user experiments on, the outcome of the review by the committees, and thus the scientific value of the proposals, will play a major role, although feasibility, safety considerations and availability of resources will also carry some weight in the final allocation, especially in early operation.
If a proposal will be rejected, adequate feedback will be given to the main proposer.