Device and method for adjusting sample scattered plane of cold neutron triple-axis spectrometer

Abstract

The invention relates to a device and a method for adjusting the sample scattered plane of a cold neutron triple-axis spectrometer. The device comprises a rotary table, a lifting table, an upper tilt table, a lower tilt table, round pins, a circular support plate and an upper computer, wherein the rotary table is fixed on the lifting table through one round pin; the lifting table is fixed on the upper tilt table through one round pin; the upper tilt table is fixed on the lower tilt table through one round pin; the lower tilt table is fixed on the circular support plate through one round pin; the circular support plate is fixed on the sample table of the cold neutron triple-axis spectrometer through a location round pin and a screw; the location round pin ensures the superposition of the central axis EE' of the circular support plate and the z-directional central axis of the sample table; the sample table provides a theta rotary table and a 2theta rotary table rotating around the central axis EE' of the circular support plate; the theta rotary table drives the circular support plate to rotate, the 2theta rotary table drives a detector to rotate, and the detector is used for recording the intensity of the outgoing neutrons of a sample and sending the recorded result to the upper computer.

Description

technical field [0001] The invention relates to the technical field of neutron scattering, in particular to a device and method for adjusting a sample scattering plane of a cold neutron triple axis spectrometer. Background technique [0002] Neutron scattering techniques are fully realized by different types of neutron scattering spectrometers. Neutron scattering follows the Ewald sphere in reciprocal vector space, satisfying in, is the incident neutron beam vector, is the outgoing neutron beam vector, is the scattering wave vector. By changing with the size of and direction can be measured and Scattering wave vectors of different sizes and directions in the formed plane all measurable The composed plane is called the scattering plane. For a cold neutron triaxial spectrometer, with are vectors in the horizontal plane, so It must also be located in the horizontal plane, which means that only the scattering vector in the horizontal plane can be mea...

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Problems solved by technology

[0003] The first cold neutron triaxial spectrometer in China is built on the cold neutron beamline of the reactor of the Chinese Academy of Engineering. Like the sample stage of the existing international cold neutron triaxial spectrometer, it provides two The rotary θ rotation stage and 2θ rotation stage, and two tilting stages are installed on the sample stage, which lacks accuracy and efficiency in terms of the adjustment of the sample scattering plane, resulting in the sample being placed behind the two inclined stages on the sample stage for the first time. , it is necessary to manually adjust or re-fix the sample near the sample stage by experience, and gradually adjust the scattering plane of the sample to an acceptable error range, which not only wastes a lot of neutron beam time, but also makes the experiment Personnel were repeatedly exposed to residual radiation

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