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To date, the BRISP spectrometer represents the state-of-the-art for every instrument aiming to perform Brillouin neutron scattering. Exploiting accurate ray-tracing McStas simulations, we investigate an improved configuration of the BRISP primary spectrometer to provide a higher flux at the sample position, while preserving all the present capabilities of the instrument. This configuration is based on a neutron guide system and is designed to fit the instrument platform with no modifications of the secondary spectrometer. These evaluations show that this setup can achieve a flux gain factor ranging from 3 to 6, depending on the wavelength. This can expand the experimental possibilities of BRISP towards smaller samples, possibly using also complex sample environments. [ABSTRACT FROM AUTHOR]

The new Time-of-Flight (TOF) Brillouin Spectrometer (BRISP) for inelastic neutron scattering has been developed and constructed at ILL's High Flux Reactor (HFR) for investigating a host of open scientific problems in the low-momentum region and relatively high incoming neutron energies with a dedicated instrument [1]. It studies the high-frequency dynamics of atomic nuclei and electron spins in disordered systems, ranging from liquids to compressed gases, including magnetic and biological systems. [ABSTRACT FROM AUTHOR]

The construction project of the novel thermal neutron Brillouin spectrometer (BRISP) is entering its commissioning period. After a brief review of the scientific motivation and the technical components of the instrument, we present here a historical overview of the installation steps that have gradually brought such a difficult project into the present important phase. [ABSTRACT FROM AUTHOR]

Abstract: We describe the main technical features of the novel thermal neutron small-angle time-of-flight spectrometer BRISP, which recently entered its commissioning phase at the High-Flux Reactor of the Institut Laue-Langevin in Grenoble (France). The state of art of the spectrometer development is described, and results of the first important calibration tests, such as the determination of the instrumental energy resolution, are reported. A general outline of possible future scientific topics to be addressed by the instrument is finally presented. [Copyright &y& Elsevier]