Neutron reflection spectrometer optical path structure capable of performing rapid switching between polarization mode and non-polarization mode

Abstract

The present invention relates to the technical field of neutron reflection, particularly to a neutron reflection spectrometer optical path structure capable of performing rapid switching between a polarization mode and a non-polarization mode. The optical path structure mainly comprises an incident arm, a sample table and a reflection arm, wherein the incident arm comprises a first slit, a second slit, a third slit, a focusing conduction pipe, a polarizer, a first translation table, a second translation table, a first platform, a second platform and an incident arm base, the sample table comprises a vertical electromagnet, a sample, a cryostat, a third platform, a sample attitude adjustment mechanism and a sample table base, and the reflection arm comprises a fourth slit, a lifting table, a polarization analyzer, a detector, a third translation table, a reflection arm base, a fourth platform and a reflection arm rotation drive mechanism. According to the present invention, the rapid switching between the polarization mode and the non-polarization mode can be achieved by simply controlling and adjusting the movements of the three translation tables and the lifting table, such that the structure is easily achieved, and the precision of the experiment is high.

Description

technical field [0001] The invention relates to the technical field of neutron reflection, in particular to an optical path structure of a neutron reflection spectrometer capable of rapidly switching polarization and non-polarization modes. Background technique [0002] Neutron reflection technology is an advanced material characterization technology that obtains information such as the structural composition of the interface in the range of 0.5-500nm by measuring the reflection of neutrons by the interface thin film material. The unique properties such as electrification make neutron reflection technology increasingly become an important research method for the film structure of thin film materials; The interaction between neutrons and the magnetic moments of magnetic materials can be recorded by the reflected neutrons, making the neutron reflection technique a powerful tool for obtaining the magnetic structure information of these magnetic thin film materials and measuring...

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Problems solved by technology

[0007] The inventor of the patent of the present invention disclosed a neutron can be used for neutron The structural design of the air bearing rotating platform of the reflectance spectrometer, the paper mainly discloses the structural design of the air bearing rotating platform and after theoretical analysis and data processing test methods, it is concluded that the structure of the air bearing plus friction wheel drive can meet the requirements of multifunctional reflectance spectroscopy. The movement requirements of the reflection arm of the instrument, although the air bearing rotating platform disclosed in this document can be applied to the movement and positioning of the detector of the neutron reflectance spectrometer, but it cannot realize the linkage between the sample and the detector, that is, in the technical inspiration of this document Under this condition, the optical path structure of the neutron reflectance spectrometer that can quickly switch between polarized and non-polarized modes is not available; in addition, the patent number is 201310081905.1, and the patent name is a precision body movement for high-resolution neutron powder diffraction spectrometer In the patent literature of the device, it is disclosed that the detector carrying unit is supported by air flotation, the friction wheel is driven by the driving motor to drive the detector carrying unit to rotate around the sample center, and the detector carrying unit is fed back through the circular grating set in the center. Rotation angle and positioning accuracy, the air-supported detector carrier unit can also be applied to the movement and positioning of the detector of the neutron reflectance spectrometer, but it is still impossible to realize the linkage between the sample and the detector, that is, under the technical inspiration of this document , it is impossible to obtain the optical path structure of the neutron reflectance spectrometer that can quickly switch between polarized and non-polarized modes

[0008] Another patent number is 201110091018.3, and the patent name is the patent document of the adjustment structure of the neutron optical path of the horizontal sample geometric neutron reflectance spectrometer, which discloses an incident lifting mechanism and a reflection lifting mechanism applied to the neutron reflectance spectrometer. By adjusting the position of the slit and the neutron flight tube, the linkage between the sample and the detector is realized, but its essence is to change the incident angle and reflection angle of the neutron beam at the same time, so as to satisfy the geometric relationship of reflection, which cannot be applied to flight The collimation adjustment of the flight distance of the time spectrometer, and only the non-polarized neutron reflection experiment of horizontally placed samples can be performed on this spectrometer, and the polarized neutron reflection experiment cannot be performed. Under the technical inspiration of this document, The optical path structure of the neutron reflectance spectrometer that can quickly switch between polarized and non-polarized modes is also not available

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