CAMEA--A novel multiplexing analyzer for neutron spectroscopy.

Area of Science:

• Condensed matter physics
• Materials science
• Neutron scattering

Background:

• Cold-neutron triple-axis spectrometers are crucial for materials research.
• Current instruments face limitations in efficiency and data acquisition speed.
• Optimizing spectrometers is key for studying complex materials and phenomena.

Purpose of the Study:

• To introduce the Continuous Angle Multiple Energy Analysis (CAMEA) system.
• To detail the novel design and specifications of CAMEA for the RITA-2 spectrometer.
• To highlight CAMEA's capabilities for efficient materials characterization.

Main Methods:

• Installation of CAMEA on the RITA-2 spectrometer at SINQ, PSI.
• Utilizing sequential upward scattering analyzer arcs, each set to a fixed final energy.
• Employing position-sensitive detectors for simultaneous data acquisition over a wide angular range.

Main Results:

• CAMEA enables simultaneous recording of neutrons across multiple final energies and a broad angular range.
• It facilitates rapid mapping of excitations in the horizontal scattering plane.
• Achieves quasi-continuous angular coverage of approximately 60° in a single acquisition.

Conclusions:

• CAMEA significantly enhances spectrometer efficiency for energy and momentum coverage.
• The system is particularly suited for parametric studies under restrictive sample environments.
• It will accelerate research on novel materials, especially those requiring small sample sizes.