HU Ze; YUAN Yuan; LI Lisi; REN Qingyong; FENG Yu; SHEN Junying; LUO Wei; TONG Xin

doi:10.7498/aps.74.20241412

Abstract

Inelastic neutron scattering is a pivotal technique in materials science and physics research, revealing the microscopic dynamic properties of materials by observing the changes in energy and momentum of neutrons interacting with matter. This technique provides important information for quantitatively describing the phonon dispersion and magnetic excitation of materials. Inelastic neutron scattering spectrometers can be divided into triple-axis spectrometers and time-of-flight spectrometers, according to the method of selecting monochromatic neutrons. The former has high signal-to-noise ratio, flexibility, and precise tracking capabilities for specific measurement points, while the latter significantly improves experimental efficiency through various measures. The application of inelastic neutron scattering spectrometers is quite extensive, playing an indispensable role in advancing frontier scientific research in the study of mechanisms in various materials such as magnetism, superconductivity, thermoelectrics, and catalysis. The high-energy inelastic spectrometer at the China Spallation Neutron Source is the first time-of-flight neutron inelastic spectrometer in China, achieving high resolution and multi-energy coexistence with its innovative Fermi chopper design. Additionally, the number of available single neutron beams in the experiment of this facility has reached the international leading level.

Keywords:

Authors and contacts

Corresponding author: LUO Wei, luowei@ihep.ac.cn ; TONG Xin, tongxin@ihep.ac.cn

Funds: Project supported by the Sun Yat-sen University Technology Development (Commission) Contract, China (Grant No. SYSU-74130-20191017-0001), the National Key Research and Development Program of China (Grant No. 2020YFA0406000), and the National Science Fund for Distinguished Young Scholars of China (Grant No. 12425512).

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Cited By

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谱仪	HRC	4SEASONS	SEQUOIA	ARCS	MERLIN	HD
中子源	J-PARC	J-PARC	SNS	SNS	ISIS	CSNS
慢化器	DHM	CHM	DWM	DWM	DWM	DWM
E_i/meV	1—2000	5—300	8—2000	10—1500	7—2000	10—1500
Q/Å^–1	—	—	—	0.15—22	—	0.1—41.5
水平角度	–31°—62°	–35°—130°	–30°—60°	–28°—135°	–45°—135°	–30—130° 前期(–30°—60°)
垂直角度	20°—20°	–25°—27°	–18°—18°	–27°—26°	–30°—30°	–30—30°
分辨率	>2%	>5%	1%—5%	3%—5%	4%—7%	3%—10%
L₁/L₂/L₃	14/1/4	16.3/1.7/2.5	18/2/5.53	11.6/2/3—3.4	10/1.8/2.5	16/2/2.5
样品尺寸	5 cm×5 cm	4.5 cm×4.5 cm or 2 cm×2 cm	5 cm×5 cm	5 cm×5 cm	5 cm×5 cm	5 cm×5 cm or 3 cm×3 cm

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