Science Seminar: Eddy Lelievre-Berna and Fabienne Duc: Next-generation high-field magnets for neutron scattering

Tuesday 26 Sept 2023, 10:00 → 11:00 Europe/Stockholm

Universe (ESS, Lund)

Abstract:

Studies of magnetism, superconductivity and quantum systems with neutrons is a vibrant research area underpinning a new generation of devices as well as leading to a deeper understanding of nature at a fundamental level.

Many experiments require high magnetic fields and very low temperatures but the community cannot apply fields greater than 15 T vertically and 17 T horizontally down to 100 mK or less despite tremendous efforts over two decades:

• HZB colleagues have built with NHMFL (USA) an impressive horizontal 26 T magnet equipped with a dilution refrigerator. Among the 80 proposed experiments, many were carried out with great success from 2015 until the shutdown of the source in 2019.
• In parallel, looking for a cheap solution for elucidating long standing scientific questions, ILL and LNCMI have built an horizontal 40 T pulsed field magnet which is regularly used to investigate samples down to 2 K.
• In November 2022, after discussing the most relevant scientific subjects, scientific and technical experts have identified ways to develop modern high-field generators for neutron scattering facilities. Time has come to push the limits and build innovative magnets which will put European neutron research centres at an unprecedented level and collect data that will better complement those collected at the EMFL facilities:
• a 40 T pulsed-field magnet allowing a better exploitation of the beamtime and capable of cooling samples to temperatures required by quantum spin systems,
• a 20 T steady-state magnet built from high-Tc superconducting tapes and hosting dilution refrigerators.

After a quick overview of the scientific motivations, we will present the EMFL - LENS project we propose to submit to the European Commission to finance their construction.

Eddy Lelievre-Berna and Fabienne Du are from the ILL in Grenbole, France. The research team feature on this website:

https://www.ill.eu/users/support-labs-infrastructure/sample-environment/services-for-advanced-neutron-environments

Date: 26 September, 2023

Time: 10:00-11:00

Venue: Universe, B01, ESS, Lund

Coffee/tea and a biscuit will be provided.

If you would like a zoom link, please contact useroffice@ess.eu and this can be provided.

If you are an external visitor to ESS, please arrive between 09:45 and 09:55 to give time to collect your visitor badge and be guided to the event. Please bring your passport or national ID card to identify yourself at security reception.

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