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Magnetic analysis system for high-density sample analysis

A sample analysis and magnetic analysis technology, applied in the direction of magnetic declination of separation tube, sample introduction/extraction, parts of particle separator tube, etc. High detection efficiency, simple structure, and strong flow are achieved

Pending Publication Date: 2020-08-14
LANZHOU UNIVERSITY
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Problems solved by technology

However, the stability and uniformity of its magnetic field strength is not as good as that of permanent magnets, and it is larger and consumes more energy.

Method used

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  • Magnetic analysis system for high-density sample analysis

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Embodiment Construction

[0023] Such as figure 1 As shown, the present invention discloses a magnetic analysis system for high-density sample analysis, including a cesium sputterer 1, a cesium sputtering target 2, an extraction and focusing electrode 3, an accelerating electrode 4, a magnetic deflection mass analyzer 5, a free drift Zone 6. Microchannel plate detector 7.

[0024] The degree of vacuum in the cesium sputterer 1, the cesium sputtering target 2, the extracting and focusing electrode 3, the accelerating electrode 4, and the magnetic deflection mass analyzer 5 is less than 10 -8 Pa, using a cesium pot to heat the alkali metal cesium to form cesium vapor, the cesium vapor enters the reaction chamber, that is, the cesium sputterer 1 through the cesium vapor inlet shown in the figure, and part of the cesium vapor passed in is adsorbed on the cesium sputtering target 2 surface to reduce the work function of the cesium sputtering target 2 surface. Secondly, the electrons from the heating filam...

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Abstract

The invention discloses a magnetic analysis system for high-density sample analysis. The magnetic analysis system comprises a cesium sputter, a cesium sputtering target, an extraction and focusing electrode, an acceleration electrode, a magnetic deflection mass analyzer, a free drift region, a micro-channel plate and a data acquisition card. The system has the advantages of being relatively simplein structure, safe and simple to operate and convenient to repair and maintain; and the beam is high in flow intensity, stable in beam output, high in detection efficiency and high in instrument stability. The system is a modular system, is flexible in use, even can be divided into a plurality of parts to be used independently, and is very convenient to replace and modify modules when equipment is out of service or updated. According to the system, the content of trace (one million) 54Mn, 55Fe, 60Co, 63Ni, 90Sr and 152Eu radionuclides can be measured, high-precision separation of related nuclides can be realized, and the system can be used for measuring nuclide activity and specific activity.

Description

technical field [0001] The invention belongs to the technical field of mass spectrometry equipment, and in particular relates to a magnetic analysis system for high-density sample analysis. Background technique [0002] As early as 1912, J.J. Thomson and others built the world's first mass spectrometer. Subsequently, people perfected its design and carried out the determination of element isotope abundance. In the 1930s, scientists completed the measurement of natural isotope abundance. In 1940, A.O.Nier and others successfully designed the 60° sector magnetic field mass spectrometer for the first time, which became the basis of modern mass spectrometers. In the early days, mass spectrometry was mainly used to explore isotopes and the measurement of atomic weights of elements, and was subsequently applied to isotope fractionation. This technology has played an extremely important role in the artificial separation of isotopes and its enrichment process, and has made great ...

Claims

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Application Information

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IPC IPC(8): H01J49/04H01J49/20H01J49/30
CPCH01J49/0422H01J49/20H01J49/30
Inventor 向昱霖史国强苏容波刘作业孙少华
Owner LANZHOU UNIVERSITY
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