FisMat2017 - Submission - View

Abstract's title: Italian activities at ILL
Submitting author: Francesca Natali
Affiliation: CNR-IOM c/o Institut Laue Langevin
Affiliation Address: 71, Avenue des Martyrs 38000 Grenoble (France)
Country: France
Oral presentation/Poster (Author's request): Oral presentation
Other authors and affiliations: Francesca Natali (CNR-IOM c/o OGG-Institut Laue Langevin, Grenoble, France) Ferdinando Formisano (CNR-IOM c/o OGG-Institut Laue Langevin, Grenoble, France)

Thanks to the partnership established 20 years ago uniting Italy and ILL, it was possible to set and develop two CRG instruments among the instrument suite of ILL. This was an incredible opportunity for italian scientific community especially considering the lack of a neutron source in our country. The two spectrometers not only allowed a dedicated access to the Italian neutron scattering community and a progressive expansion of it during the years but represented a sort of permanent school for a huge amount of people both in the field of neutron spectroscopy and physics of matter, and in the field of research and development for neutron instrumentation. It is worth noting how the two Italian spectrometers which will be installed at the new European Neutron Source are the results of the long-time experience matured by several researchers at ISIS and of course at ILL.

In this short talk we will briefly account for the two Italian CRG instruments at ILL.

IN13 originates from the collaboration settled in 1998 between the Italian INFM (now CNR) and the French CEA/CNRS/UJF (now UGA). It is a backscattering spectrometer which operates at thermal neutrons (l=2.23Å) providing a remarkable high energy resolution (8µeV) and unique momentum transfer range (Q < 4.9Å-1). Scientific applications are found in biology, medical science, chemistry, physics and cultural heritage. Currently, in the framework of the ILL Endurance project, a major technical upgrade is under progress in order to increase the neutron flux. It mainly includes two major issues: 1) the refurbishment of the H24 neutron guide and consequent relocation of the IN13 spectrometer and 2) the conception of a temperature gradient monochromator.

BRISP is a NBS spectrometer. The BRISP project started at the beginning of 2000 thanks to the initiative of a German-Italian consortium, at a time where there was no spectrometer dedicated to NBS. Accessing small Qs at thermal energies allowed BRISP to represent an innovation in the worldwide neutron spectrometer panorama and for a long time and still at the present is the only instrument in the world specifically dedicated to NBS. The core activity covered at the instrument is the study of the collective dynamics in disordered systems; among them molecular and quantum liquids, liquid metals, glasses, systems of biological interest, aqueous solutions, water under confinement and high pressure systems. At the end of 2017 the BRISP contract will end. This should be the right time to promote possible upgrades of the instrument aiming to update its performance and likely enlarge its scientific case. That’s why a renovated BRISP spectrometer has been submitted in the frame of ILL Endurance Project. The new project envisages the displacement of the spectrometer in the Guide Hall ILL7 which has as a major healthy consequence a significant increase of the signal to noise ratio with respect to the present location of the instrument.