Mar 20 – 23, 2023
Campus Garching
Europe/Berlin timezone

SANS-LLB, the new small-angle instrument at SINQ, PSI

Mar 21, 2023, 4:00 PM
Yards 4 - 6 (Fakultät für Maschinenwesen)

Yards 4 - 6

Fakultät für Maschinenwesen

Board: TU-074
Poster Neutron Instrumentation, Optics, Sample Environment, Detectors, and Software Poster session TUESDAY


Urs Gasser (Paul Scherrer Institut)


In 2023, the user program at SINQ, Paul Scherrer Institut (PSI), will again offer two small-angle instruments, the new SANS-LLB and as before SANS-I. SANS-LLB is the adapted and optimised PA20 SANS instrument from the Laboratoire Léon-Brillouin (LLB) that was transferred to PSI after the shutdown of the Orphée reactor in 2019 and will be operated by LLB and PSI. SANS-LLB is a general-purpose SANS instrument with a flight path of up to 18 meters, a wavelength range from 3 to 20 Angstroms, with option for polarized neutrons, a versatile collimation section, and two 3He detectors - the central main detector and an L-shaped detector at a lower distance to increase the q-range covered with a single setting of the instrument. As SINQ obtained a neutron-guide upgrade in 2019-2020, SANS-LLB will become available with a new 45 mm x 45 mm guide system that is optimized from the SINQ source to the sample position. Various sample environments covering soft and hard matter research are available and are mostly shared with SANS-I. A novel semi-transparent beamstop will allow to take transmission data continuously without dedicated transmission measurements, thus shortening measurement times and increasing sample throughput. A new detector electronics developed at PSI will be installed in 2023 and will allow for time-resolved measurements. The neutron flux on SANS-LLB is expected to be comparable although somewhat lower than on SANS-I due to the smaller cross section of the guide and the larger distance from the source. With SANS-LLB, the number of SANS beam days offered at SINQ will be doubled.

Primary author

Urs Gasser (Paul Scherrer Institut)

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